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Chapter Seven: Troubleshooting

© 2018 Cutting Edge Optronics, Inc.

54

Patara I and II Laser User Manual

Figure 7-1 – Typical Beam Profile at Beam Waist, Farfield at Operating Current

If the beam profile is abnormal, such as a roundness below 90%, a split beam or
alternate beam structure, follow the steps below to improve beam quality:



Not Operating at Correct Parameters:

Verify that all operating parameters

match the values on the ATP Test Report Data Summary. If all settings are
correct, proceed to

Misalignment

.



Misalignment:

If the laser is misaligned, the output power will be low. The

beam profile may be distorted. The threshold will be higher. Perform the laser
power optimization procedures as described in the

Optimize Laser

Performance

section in

Chapter 5: Maintenance

to optimize laser output

power and beam profile. After optimization, the beam profile and laser output
power may be restored at a higher operating current and the laser threshold
may be higher, as well. This is normal for aging laser diodes (see the

Optimize

Laser Performance

section of

Chapter 5: Maintenance

).



Failed Laser Diode Bar:

If the output power is similar to the ATP Test

Report Data Summary value, but the beam profile is still distorted, this could
be caused by an uneven pumping light distribution. This could be due to a
failed laser diode bar. Measure the voltage at the output of the diode current
source compared to the diode module voltage on the ATP Test Report Data
Summary.



Contaminated Coolant

: Indications that the coolant is contaminated are the

operating current is higher and the beam profile may be distorted. Refer to
SVC-FSB-0001 for chiller cleaning procedures.



Damaged Optics:

Optimization will not recover laser output power lost due

to damaged optics. Internal and external damaged optics can both cause
distortion of the output laser beam, but only damaged optics inside the laser
cavity will increase the threshold current. Verify laser output window and all
external optics are clean and free of damage. If no damage is found, move the

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Содержание PA-020-QTGP

Страница 1: ...1 Patara Laser Model PA 020 QTGP Gen I and II User Manual JANUARY 2018 CEO UMAN 0092 Rev A ...

Страница 2: ... p m Central time Technical Support 636 916 4900 follow prompts for department directory Email ngceoservice ngc com Cutting Edge Optronics Headquarters 20 Point West Blvd St Charles MO 63301 USA Sales Support 636 916 4900 follow prompts for department directory After office hours please leave a voice mail message Outside North America contact a Cutting Edge Optronics sales office or distributor se...

Страница 3: ...luding photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of Cutting Edge Optronics Patara I and II Patents Northrop Grumman Corporation products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price ch...

Страница 4: ...t properly transferred according to local regulations concerning WEEE equipment Contact Northrop Grumman or a local distributor for shipping instructions Please package the products as directed for a return for repair ROC ROHS Declaration In accordance with the Clause 6 2 of Marking for Control of Pollution Caused by Electronic Information Products SJ T11364 2006 for Measures for the Administratio...

Страница 5: ... a sequence of button pushes e g MENU CHANNEL SETUP PULSE WIDTH means pushing the MENU button then push the CHANNEL SETUP soft key and then push the PULSE WIDTH soft key italic Italic text denotes references to other resources that may be helpful or to bring attention to important information This icon denotes a note which indicates important information I O Power Switch Position Symbols I On O Of...

Страница 6: ... 2018 Cutting Edge Optronics Inc vi Patara I and II Laser User Manual Laser Emission Use caution Shock Hazard Use caution Caution Risk of danger Refer to manual Chassis Ground ...

Страница 7: ...plete operation manual For any questions on the product that have not been discussed sufficiently in this manual contact the manufacturer for complete instructions Failure to heed this warning may result in the destruction or serious damage to the device and will void the product warranty The trouble shooting section is intended to help guide the user to the source of problems Do not attempt repai...

Страница 8: ...ation Chapter 4 Installation and Operation discusses how to unpack setup and powering on the system for the first time Chapter 5 Maintenance provides information on proper maintenance of the laser system Chapter 6 Customer Service provides resources to help fix problems with the Patara laser Chapter 7 Troubleshooting provides possible solutions to the most commonly reported issues with the Patara ...

Страница 9: ...r Devices and Radiological Health Compliance 9 Chapter 3 System Details 11 Patara Laser 12 Closed Loop Chiller 13 eDrive Nitro 19 Chapter 4 Installation and Operation 20 Laser System Components 21 Unpacking the Laser System 22 Laser Head Setup 23 eDrive Setup 24 Chiller Setup 25 Connecting the Chiller 26 Connections to the Laser Head 27 PolyScience 6000 Power Up Procedure 32 First Time Laser Power...

Страница 10: ... 41 Maintain Chiller 43 Check Hold Off 43 Extend Lifetime of Laser Diodes 44 Optimize Laser Performance 44 Chapter 6 Customer Service 49 Contacting Customer Service 50 Module Replacement 50 Return the Instrument for Repair 50 Chapter 7 Troubleshooting 51 Initial Checklist 52 Laser Output Power 52 Laser Beam Quality 53 eDrive Operation 55 Appendix A Customer Service 57 Questions 58 Appendix B Syste...

Страница 11: ...ling System Requirements 14 Table 3 3 Avoid with Chillers 14 Figure 3 4 Constant Dew Point Lines for Ambient Temp and Relative Humidity 17 Table 3 4 Air Condensation Temp 18 Figure 3 5 eDrive Nitro Control Panel 19 Figure 4 1 Components for the Patara Laser 21 Figure 4 2 Basic setup for the laser power test 23 Table 4 4 Recommended Fuse Ratings 24 Figure 4 3 Water Hoses and Filter Connections 26 F...

Страница 12: ...Figure 4 13 Signal Connection 32 Figure 4 14 First Giant Pulse with FPS Disabled 38 Figure 5 1 Desiccant Cartridge 42 Figure 5 2 Gram Desiccant Bottom 42 Figure 5 3 Gram Refill and Refill Tool 42 Figure 5 4 Example of Power Dependence and Pulse to Pulse 45 Figure 5 5 Example of Laser Performance Dependence on the Operating Current 46 Figure 5 6 Accessible Holes for HR and HM Cavity Mirror Adjustme...

Страница 13: ...1 2018 Cutting Edge Optronics Inc 1 Patara I and II Laser User Manual Chapter 1 Introduction This introduction provides the following information Theory of operation System description ...

Страница 14: ...erted outside the cavity However if the nonlinear conversion is completed inside the oscillator cavity the leftover fundamental simply returns to the oscillator and is conserved amplified and returned to the nonlinear frequency converter As a result nearly all the power which could have been optimally coupled out of the cavity by a semi transparent mirror is now converted to another wavelength pro...

Страница 15: ...n intensity profile mode which is of the smallest lateral extent and divergence in the set The aperture in the oscillator path limits the laser beam s transverse spatial extent To achieve maximum power and efficiency this aperture should coincide with the aperture of the amplifier medium so that the oscillating beam fills the gain medium to the maximum extent Laser beam quality will degrade if the...

Страница 16: ...added functionality of accepting and executing power level commands is built into the accompanying eDrive electronic system System Description The Patara laser consists of three interconnected subsystems The optics subsystem contains the laser oscillator the eDrive electronic subsystem provides power and control for the laser transmitter and the chiller provides thermal control The user must suppl...

Страница 17: ...9 kHz 1 5 rms Output Stability Over 8 hours 9 kHz 3 rms Table 1 2 Other Specifications Table Parameter Performance Electrical Inputs Auto ranging 100 250 VAC 47 63 Hz Drawing 7A Cooling Closed Loop Recirculating Chiller1 Coolant Opti Shield Plus Operating Temperature 18 30 C Laser head size 24 L x 6 H x 8 W eDrive Nitro Size 7 H x 19 W x 17 D 1 Chiller must be able to circulate water at the approx...

Страница 18: ...d controlled by a TEC controller inside the eDrive Refer to the Check the eDrive section of this manual in Chapter 4 Installation and Operation for TEC Controller settings Thermal Control Subsystem Thermal control and heat removal from the laser transmitter is accomplished by the chiller The laser s integral flow switch will interrupt drive current to the amplifier module and power to the Q switch...

Страница 19: ...y before installing or operating the laser A Northrop Grumman trained service engineer should perform all service and repair operations If planning to service the laser please follow the procedures in Chapter 5 Maintenance Sections included in this chapter include Safety Overview Precautions for Safe Operation CDRH Compliance ...

Страница 20: ...times during installation operation maintenance or service of the laser avoid exposure to laser or collateral radiation exceeding the accessible emission limits listed in Performance Standards for Laser Products U S Code of Federal Regulations 21 CFR 1040 10 d Precautions for Safe Operation Avoid looking directly into the laser beam or at specular reflection even with protective eyewear on Wear la...

Страница 21: ...ded from accidental touch Do not smoke eat or drink in laser areas Avoid leaving an operating laser unattended Center for Devices and Radiological Health Compliance This laser product complies with Title 21 of the U S Code of Federal Regulations Chapter 1 Subchapter J Part 1040 10 and 1040 11 as applicable To maintain compliance with these regulations once a year or whenever the product has been s...

Страница 22: ...Chapter 2 Laser Safety 2018 Cutting Edge Optronics Inc 10 Patara I and II Laser User Manual Figure 2 1 Radiation Labels and Location ...

Страница 23: ...3 2018 Cutting Edge Optronics Inc 11 Patara I and II Laser User Manual Chapter 3 System Details This chapter discusses the operation of the Patara laser Patara laser Closed loop chiller eDrive Nitro ...

Страница 24: ... the Patara laser and 99 7 mm 3 93 from the side with the emission indicator Figure 3 1 Patara Front View The rear panel of the Patara laser has connectors for the cable connection to the eDrive Nitro The coolant in and coolant out ports are also found on the back panel Gen I Gen II Figure 3 2 Patara Rear View The alignment openings are located on both front and back panels and are sealed by screw...

Страница 25: ...damage to the mirrors and crystals inside the laser All the holes on the laser enclosure should be sealed all times to prevent moisture penetration Moisture in the enclosure can degrade the lifetime of SHG crystal as well as the coatings on all optical components Figure 3 3 Patara II Top View Closed Loop Chiller The single most common cause of a laser returned for repair involves customer damage M...

Страница 26: ...erse City Mich 231 946 2931 3 The filter should be capable of removing particles 5 µm or larger The filter and coolant should be replaced each month or more frequently if the pH drops below 9 or the filter or coolant show any discoloration 4 When not using NG drive electronics verify that flow sensor interrupts current to diodes less than 500 ms after a low flow condition occurs Table 3 3 Avoid wi...

Страница 27: ...This interlock interrupts drive current to the diodes when coolant flow rate drops below a set point When setting up the laser system for the first time Northrop Grumman recommends testing the flow interlock before firing Turn the eDrive on without current applied to the laser and then turn the chiller off A coolant interlock fault should appear on the screen By testing the interlock with no curre...

Страница 28: ... near the laser is 28 C 82 F Referring to Figure 3 4 and Table 3 4 find the intersection of the 28 C air temperature and the curve for the 22 C diode temperature At a relative humidity of 70 or greater condensation will form on the laser diodes Controlling the humidity level inside the laser is important to extend the lifetime of the SHG crystal The desiccant cartridge on the top cover can help to...

Страница 29: ...Chapter 3 System Details 2018 Cutting Edge Optronics Inc 17 Patara I and II Laser User Manual Figure 3 4 Constant Dew Point Lines for Ambient Temp and Relative Humidity ...

Страница 30: ...1 13 9 16 3 18 4 20 3 22 0 24 35 4 9 5 0 4 5 3 9 6 12 9 15 7 18 2 20 3 22 3 24 0 26 34 2 8 0 1 3 7 1 11 3 14 8 17 6 20 1 22 3 24 2 26 0 28 33 0 6 5 2 9 8 8 13 1 16 6 19 5 22 0 24 2 26 2 28 0 30 31 8 4 9 4 6 10 5 14 9 18 4 21 4 23 9 26 2 28 2 30 0 32 30 6 3 4 6 2 12 2 16 7 20 3 23 2 25 8 28 1 30 1 32 0 34 29 5 1 9 7 8 13 9 18 5 22 1 25 1 27 7 30 0 32 1 34 0 36 28 3 0 4 9 5 15 7 20 2 23 9 27 0 29 6 ...

Страница 31: ...O Q switch pulses controls the temperature of the SHG crystal and monitors the various interlocks The front panel provides an emergency stop button to halt laser output WARNING The emergency stop should only be used in an emergency situation For normal operation use the shutter or emission buttons to halt laser output Additional information about the eDrive Nitro can be found in the eDrive User Ma...

Страница 32: ...Unpacking the laser system Laser head setup eDrive setup Chiller setup Connecting the chiller PolyScience 6000 power up procedure First Time Laser Power up procedure Daily operation Output power control External triggering and FPS The purchaser is responsible for any loss and injury during installation and use of the laser system Northrop Grumman recommends that a qualified service technician inst...

Страница 33: ...ser System Components Before installing the laser be familiar with the components of the laser system see Figure 4 1 Laser head Chiller eDrive Laser Signal Cable Diode Power Cable Q Switch RF Cable AC Power Cables Hose for Chiller Filter housing and Filter Filter Wrench Figure 4 1 Components for the Patara Laser ...

Страница 34: ...y NG representative NG will arrange for repair without waiting for settlement of the claim Keep the shipping container If filing a damage claim it may be needed to demonstrate that the damage occurred as a result of shipping If returning the unit for service the specially designed carton assures adequate protection A Patara laser system consists of Laser head eDrive Laser signal cable Diode power ...

Страница 35: ...mately 1 5 feet away from the laser in the direction of the laser output beam To protect the power meter a negative lens f 100 mm with an anti reflective AR coating at 532 nm should be installed in front of the power meter as shown in Figure 4 2 below If a negative lens is not available the power meter should be at least 2 m away from the laser so that the beam size is larger and the power density...

Страница 36: ...ncy Fuse Ratings F1 F2 120 V 15 A 47 63 Hz 15 A 240 V 7 A 47 63 Hz 8 A Mounting The front panel of the eDrive is designed with four holes to mount into an EIA 310D compliant rack If this option is used the eDrive s weight requires extra side supports If the eDrive is to be used on a desktop or table top it is recommended that the eDrive be equipped with feet to prevent the driver from marring the ...

Страница 37: ...els can be locked to keep the chiller in place while in use To help prevent voltage drops position the chiller as close as possible to the power distribution panel Avoid voltage drops by using a properly grounded power outlet wired with 14 gauge or larger diameter wire The use of an extension cord is not recommended NOTE The chiller may be located at a level below that of the equipment being coole...

Страница 38: ...e it is connected to the laser head These procedures are listed on the CD compact disc shipped with the unit They are also available through Northrop Grumman customer service WARNING Make sure that the chiller will not contaminate the laser head Connecting the Chiller Water Hoses and Filter Connections The required water hoses filters and fittings are included in the plumbing kit that was shipped ...

Страница 39: ...ng the provided L bracket NOTE Threaded hose barbs and adapters should have threads wrapped 3 4 times with Teflon tape Figure 4 4 depicts the chiller with connected water hoses on a Patara II laser Figure 4 4 Chiller Assembled with Water Hoses and Filter Connections to the Laser Head Figure 4 5 depicts the connectors on the rear panel of the Patara Laser All of the connectors are clearly labeled ...

Страница 40: ...n and coolant out ports by following the flow path direction Wetting the o rings of the quick disconnect fittings and receptacles can prevent the o ring from being damaged Make sure that the quick disconnect fittings are locked by listening for a clicking sound Gen I Gen II Figure 4 6 Plumbing Connection 2 Connect RF Cable Connect the Q switch RF cable to the BNC connector on the laser head see Fi...

Страница 41: ...ser head see Figure 4 8 Once it is aligned the connector can be pushed in Turn the locking ring of the connector in the clockwise direction until it is locked Gen I Gen II Figure 4 8 Diode Power Connection 4 Connect laser signal Align the female connector of the laser signal cable to the J1 connector on the laser head Once it is aligned the connector can be pushed in Turn the locking ring of the c...

Страница 42: ...Patara I and II Laser User Manual Gen I Gen II Figure 4 9 Signal Connection Connections on eDrive Figure 4 10 depicts the rear panel of the eDrive Figure 4 10 Rear Panel of the eDrive 1 Connect RF cable Connect the QS RF cable to the RF OUT 1 connector as shown in Figure 4 11 ...

Страница 43: ... is aligned the connector can be pushed in Turn the locking ring of the connector in the clockwise direction until it is locked Figure 4 12 Diode Power Connection 3 Connect laser signal Connect the male connector of laser signal cable to the receptacle labeled laser interface on the back of eDrive see Figure 4 13 Once it is aligned the connector can be pushed in Turn the locking ring of the connec...

Страница 44: ...edure The following steps indicate how to turn on the PolyScience 6000 series for the first time 1 Fill the reservoir Remove the filler cap from the reservoir and using a funnel add fill the reservoir with a mixture of 10 Optishield Plus and distilled water until it reaches the MAX line on the reservoir s fluid level gauge When full remove the funnel but do not replace the cap at this time WARNING...

Страница 45: ...dd fluid as needed to bring liquid levels in the bath and reservoir up to the desired level Make sure the fluid level in the bath is above the opening on the chiller s inlet hose 5 Replace reservoir cap First Time Laser Power Up Procedure Remove the cap that protects laser output window and make sure the window is clean If not gently clean it with a lens tissue and methanol Turn on the chiller and...

Страница 46: ...ions will help locate the settings Use the following values for the Patara laser Menu 1 Menu 2 Menu 3 Parameter Setting or Value Channel Setup Internal Trigger Enabled Channel Setup Q Switch Q Switch QS Enabled Set Frequency refer to test report Set Window Width 5 µs Set Q Switch Power 100 Channel Setup Q Switch Set FPS Settings FPS Enabled FPS Mode Standard FPS Delay 250 µs Start Power refer to t...

Страница 47: ...e High Interface Setup Shutter Setup Shutter FPS Enabled Shutter Speed 5 ms Closed to Standby Disabled Interface Setup Marking Mode Setup LM Active Low Gate Active High FPS Active High Utility Functions Manual Lockout Disabled Utility Functions Humidity Options Measured Current Humidity reads out measured humidity Adjust Humidity Threshold 29 5 4 Verify that there are no objects in the laser beam ...

Страница 48: ...ver a wide range However operating protocols must be observed to assure operation without risking internal damage to optical components Table 1 1 summarizes laser performance Turn On Procedure 1 Switch the chiller to the ON position Verify correct flow rate and temperature setting to value specified on laser test report Wait until chiller has achieved proper temperature which may take five to ten ...

Страница 49: ...fic laser power settings for the best results In some cases the output power has to be changed at different stages even in the same laser process Typically the output power of a laser can be varied by changing the operating current However the active laser crystals can exhibit strong thermal lensing which is related to the operating current Variation of the operating current results in the change ...

Страница 50: ...umping light is still on during the laser processing cycle The amplitude of the giant pulse is dependent on the non lasing duration as well as the operating current Figure 4 14 First Giant Pulse with FPS Disabled CAUTION The FPS has to be enabled and parameters for FPS have to be set properly Failure to suppress the first giant pulse may cause the internal optical damage as well as damage to the w...

Страница 51: ...al Chapter 5 Maintenance The chapter contains information in these sections Required Tools and Consumable Parts List Prepare for shipment Purge housing Replace desiccant cartridge Maintain chiller Check hold off Extend lifetime of laser diodes Optimize laser performance ...

Страница 52: ...tion for draining the system Oil free dry filtered air or N2 is recommended 2 Remove coolant connections from back of laser housing 3 Connect a dry gas line to the COOLANT OUT connector on housing Coolant lines must be purged in the proper direction or trapped water may remain in the lines inside the laser If this trapped water freezes it can cause lines to leak water when operation is resumed 4 C...

Страница 53: ...t Northrop Grumman before attempting this procedure CAUTION The clean dry air input line must be on a pressure regulator and the line must be filtered Replace Desiccant Cartridge The desiccant cartridge shown in Figure 5 1 removes excess moisture from inside the laser head It is located on the lid of the Patara laser head The desiccant cartridge must be replaced regularly so it should be checked a...

Страница 54: ...idge Figure 5 2 Gram Desiccant Bottom Figure 5 3 Gram Refill and Refill Tool To replace an exhausted cartridge unscrew the old cartridge and screw in a new one Tighten with a quarter turn of a wrench to form a good seal The desiccant cartridge used in the Patara laser head is an industry standard part part number 42 228 ...

Страница 55: ...refill the chiller per the chiller and coolant manufacturer s instructions The filter used is a Hydronix pleated 5µm polyester filter part number SPC 25 1005 available at multiple online retailers Check Hold Off Checking hold off is a technique needed to verify proper operation of the laser To check hold off perform the following steps 1 Turn on the laser and run for at least 20 minutes 2 Lower th...

Страница 56: ...an be found on the Knowledge Center http www ngceoservice com Level_1_PA 020 QTGP For this procedure a green light should be visible from the laser In the absence of any visible output please review Chapter 7 Troubleshooting or contact Northrop Grumman for assistance To obtain the best performance small adjustments may optimize the laser To optimize the laser follow these steps 1 Wait for the lase...

Страница 57: ... by the TEC controller inside the eDrive Figure 5 4 illustrates an example of the dependences of power and pulse to pulse instability of the laser to the SHG crystal temperature As shown in the example the mid point of the temperature band is around 28 5 C The laser may have peak power at 29 3 C in this example but a small temperature change on the SHG could result in a power fluctuation Figure 5 ...

Страница 58: ...versible Do this step only when all the steps above have been completed and the laser does not meet the specifications with the correct settings a Locate the access holes for high reflection mirror HR and harmonic mirror HM Notice the positions of HR and HM mirrors with respect to the direction of the laser output in Figure 5 6 b Remove screws from access holes only in a dust free environment c Us...

Страница 59: ...ximize power Repeat the optimization steps with both the HR and HM until there is no significant performance improvement If Laser is still not within 5 of the original power or not stable repeat the steps of TEC optimization eDrive current optimization and HM HR adjustment until there is no significant performance improvement If the laser power can t be restored to the specification or the laser i...

Страница 60: ...nt is noted If there is no improvement try the opposite direction Perform the same procedure with the vertical adjustments of the HM and HR mount Typically SHG temperature adjustment is not needed when adjusting vertically Periodically check for hold off when making these adjustments see in the Check Hold Off section in Chapter 5 Maintenance If laser power is within 5 percent of nominal typical po...

Страница 61: ... Customer Service When calling for service in the U S dial 636 916 4900 To phone for service in other countries contact the sales agent This chapter provides reference to types of customer service needs Contacting customer service Module replacement Return the instrument for repair ...

Страница 62: ...ctions about module replacement Return the Instrument for Repair A return merchandise authorization RMA is required prior to shipping any instruments to Northrop Grumman Contact Northrop Grumman or the local distributor for RMA and shipping instructions CAUTION Failure to obtain proper shipping instructions may result in damage to the instrument Use the packing boxes supplied by Northrop Grumman t...

Страница 63: ...laser during normal use For more information please see the troubleshooting guide that is on the owner s manual CD supplied with the laser WARNING Do not attempt repairs while the unit is under warranty Complete the form in Appendix A and report problems to Northrop Grumman for repair The following sections can be found in this chapter Initial checklist Laser output power eDrive Laser Beam Quality...

Страница 64: ...low rate are correct Operate the laser and for at least 20 minutes to reach full power and stability before making any adjustments Only after verifying these conditions should adjustments to the laser system be attempted Laser Output Power Low Output Power 0 01 W 20 W Low Q switch power Check the setting of the Q switch power in the eDrive Verify that it is set to 100 Problem with power meter Use ...

Страница 65: ...nt panel of the eDrive is turned on indicating that laser shutter is open Verify there are no interlock warning messages on the eDrive and that the eDrive is supplying the correct current Verify the eDrive is not gated off externally and not commanded to low or 0 percent Q Switch power Laser Flicker When the external perturbations are applied to the laser system the laser exhibits flickering Verif...

Страница 66: ...g current and the laser threshold may be higher as well This is normal for aging laser diodes see the Optimize Laser Performance section of Chapter 5 Maintenance Failed Laser Diode Bar If the output power is similar to the ATP Test Report Data Summary value but the beam profile is still distorted this could be caused by an uneven pumping light distribution This could be due to a failed laser diode...

Страница 67: ... initial check on system This problem can be Q switch low power fault on the eDrive Refer to the eDrive Operation section in Chapter 7 Troubleshooting for procedures and details Hold off failure can be caused by a failing Q switch This requires the internal laser be repaired Occasionally a re tuned laser can suffer from hold off loss To remedy change the angle of the QSW Since QSW angle cannot be ...

Страница 68: ...RF driver has had time to cool down Q Switch HVSWR Fault Check RF cable connection to laser Perform RF output power check The Q switch has failed if the measured RF power is around 20 W with 50 Ω RF dummy load Contact Northrop Grumman for repair Q Switch Low Power Fault Perform RF output power check Verify voltage to RF driver Adjust RF power if needed Channel Over Temperature Fault Verify the eDr...

Страница 69: ...erienced while using the Northrop Grumman instruments or user manuals Call or write the customer service department to bring attention to problems that you may not have personally experienced Date Name Company or Institution Department Address Laser Model Number Serial Number Chiller Model Number Serial Number eDrive Model Number Serial Number Laser Manufacture Date Total Laser Lifetime hours ...

Страница 70: ...ller oC What are the set current and actual current from eDrive A Is Q switch enabled yes no Is Q switch triggered internally or externally What is the Q switch power percent Is FPS enabled yes no What are the FPS parameters What is the pulse repetition frequency kHz Is the output power measured directly from the laser yes no What is the measured power W When did the problem happen Have you change...

Страница 71: ...are the changes made recently to the system Please describe the problem or laser behavior as detailed as possible Suggestions Email or fax to Northrop Grumman Cutting Edge Optronics Inc 20 Point West Boulevard Saint Charles MO 63301 USA Phone 636 916 4900 Fax 636 916 4994 Email st ceolaser info ngc com ...

Страница 72: ...mass gram g tera 1012 T length meter m giga 109 G time second s mega 106 M frequency Hertz Hz kilo 103 k force Newton N deci 10 1 d energy Joule J centi 10 2 c power Watt W milli 10 3 m electric current Ampere A micro 10 6 µ electric charge Coulomb C nano 10 9 n electric potential Volt V pico 10 12 p resistance ohm Ω femto 10 15 f inductance Henry H atto 10 18 a magnetic flux Weber Wb magnetic flu...

Страница 73: ...sto optic AR Anti Reflective ATP Acceptance Test Procedure CDRH Center for Devices and Radiological Health CW Continuous Wave FPS First Pulse Suppression HeNe Helium Neon HM Harmonic Mirror HR High Reflection IEC International Electrotechnical Commission LBO Lithium Triborate N2 Nitrogen Nd YAG Neodymium Doped Yttrium Aluminum Garnet nm Nanometer OSHA Occupational Safety and Health Administration ...

Страница 74: ...nual Acronym Description PSI Pounds per Square Inch RF Radio Frequency RH Relative Humidity RMS Root Mean Square SHG Second Harmonic Generator TEC Thermal Electric Cooler TEM00 Transverse Electromagnetic Mode TTL Transistor Transistor Logic UV Ultraviolet VAC Volts Alternating Current ...

Страница 75: ...25 32 33 Temperature 33 36 52 Condensation 15 16 18 25 33 34 41 43 Contact Customer Service 50 Sales Support ii Technical Support ii Customer Service 49 D Daily Operation 36 Desiccant 16 18 40 41 42 43 Diode Module 55 E eDrive 4 5 6 12 15 19 21 22 24 30 31 32 34 36 38 43 44 47 52 53 55 56 Clearance 24 Dimensions 24 Fuses 24 Mounting 24 Rear Panel 31 32 Rear Panel 30 31 Emergency Stop Button 19 34 ...

Страница 76: ...perating Current 36 37 46 52 Optics Damage 55 Optic Subsystem 4 6 Oscillator 2 3 4 Output Power 37 45 52 53 Output Window 12 33 P Power Meter 23 35 36 43 48 52 Negative Lens 23 35 Q Q Switch 3 6 19 28 36 37 38 43 52 53 55 56 S SHG Crystal 2 6 13 16 34 38 41 45 47 48 52 Shipment 22 40 50 Shutter 35 36 37 53 T TEC Controller 3 4 6 34 35 36 45 47 52 Troubleshooting 52 Misalignment 54 ...

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