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THORLABS HRP350, Operating Manual

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THORLABS HRP350 Operating Manual Download Page 2

 

Red HeNe Laser System 

 

12112-S01 Rev CB, August 31, 2010 

Page 2 

www.thorlabs.com 

Table of Contents

 

Part 1.

 

Safety ............................................................................................................................................4

 

CE Compliance .......................................................................................................................................................... 5

 

Part 2.

 

Description ...................................................................................................................................6

 

Laser Head ................................................................................................................................................................. 6

 

Laser Power Supply ................................................................................................................................................... 7

 

HeNe Laser Overview ................................................................................................................................................ 7

 

HeNe Applications ..................................................................................................................................................... 7

 

HeNe Linewidth ......................................................................................................................................................... 8

 

HeNe Polarization .................................................................................................................................................... 10

 

Part 3.

 

Unpacking ..................................................................................................................................11

 

3.1.

 

Unpacking ............................................................................................................................................... 11

 

Shipping Inventory .................................................................................................................................................. 11

 

Part 4.

 

Set-up ..........................................................................................................................................12

 

4.1.

 

Mounting the Laser Head ...................................................................................................................... 12

 

4.2.

 

Assembly ................................................................................................................................................. 12

 

Part 5.

 

Operation ....................................................................................................................................13

 

5.1.

 

Alignment Procedure ............................................................................................................................. 14

 

Tools Required ......................................................................................................................................................... 14

 

Procedure ................................................................................................................................................................. 14

 

Part 6.

 

Troubleshooting .........................................................................................................................15

 

6.1.

 

Technical Failures .................................................................................................................................. 15

 

6.2.

 

Application Trouble Shooting ............................................................................................................... 15

 

Noise, Oscillations, and Fluctuation Sources ........................................................................................................... 16

 

Part 7.

 

Specifications .............................................................................................................................17

 

7.1.

 

Mechanical Drawing .............................................................................................................................. 17

 

Part 8.

 

Regulatory ..................................................................................................................................18

 

Part 9.

 

Thorlabs Worldwide Contacts ...................................................................................................19

 

 

 

 

Summary of Contents for HRP350

Page 1: ...HRP350 HRP350 EC High Power HeNe Laser Systems Operating Manual ...

Page 2: ...zation 10 Part 3 Unpacking 11 3 1 Unpacking 11 Shipping Inventory 11 Part 4 Set up 12 4 1 Mounting the Laser Head 12 4 2 Assembly 12 Part 5 Operation 13 5 1 Alignment Procedure 14 Tools Required 14 Procedure 14 Part 6 Troubleshooting 15 6 1 Technical Failures 15 6 2 Application Trouble Shooting 15 Noise Oscillations and Fluctuation Sources 16 Part 7 Specifications 17 7 1 Mechanical Drawing 17 Part...

Page 3: ...gure 2 Power Supply 7 Figure 3 Optical Resonator Cavity 8 Figure 4 HeNe Gain Curve Showing Cavity Modes 9 Figure 5 HeNe Energy Levels 9 Figure 6 HeNe Visible Laser Lines 10 Figure 7 Laser System 11 Figure 8 Laser Rear Panel 13 Figure 9 Laser Shutter Control Picture shows the Shutter CLOSED 13 Figure 10 Dimensional Drawing 17 ...

Page 4: ...r this type of laser High voltage is present at all times when the key switch on the control box is in the ON position Ensure that the laser head is securely connected to the power supply To prevent faulty operation be sure that the male connector is fully seated in the back of the power supply The power cord and plug are provided with a ground line To avoid possible shock ensure that the plug is ...

Page 5: ...y on an annual basis or if the product has been subjected to adverse environmental conditions such as fire flood mechanical mishandling or solvent spillage that your system s safety features listed above are available and operational For further information and assistance on laser safety contact the following agencies Laser Institute of America 13501 Ingenuity Drive Suite 128 Orlando FL 32826 Safe...

Page 6: ...pped with a manual shutter installed in the front bezel of the laser housing see Figure 1 below The front bezel has four 4 40 UNC holes to secure the optional accessory mounting ring and other industry standard HeNe accessories This laser also comes with a 3 ft long high voltage cable for connecting to the power supply This particular laser head is designed to operate at an optimum performance lev...

Page 7: ...typically called a HeNe laser is a small gas laser with many industrial and scientific uses The primary wavelength they are used at is 632 8 nm in the red portion of the visible spectrum The gain medium of the laser is a mixture of helium and neon gases in a 5 1 to 20 1 ratio that is contained at low pressure in a sealed glass tube The excitation source for these lasers is a high voltage electrica...

Page 8: ... longitudinal modes that fluctuate within the range due to thermal expansion of the cavity and other external factors The linewidth of a HeNe laser is specific to the application The axial mode structure of the HeNe laser is characterized by the number of modes the free spectral range FSR and the Doppler width see Figure 4 below The linewidth of individual axial modes is usually small kHz and is p...

Page 9: ...Spontaneous and stimulated emission between the states results in emission of 632 82 nm light along with other emission wavelengths From these states the electrons quickly decay to the ground state The HeNe laser s power output is limited because the neon upper level saturates with higher current while the lower level varies linearly with current Neon Gain Curve FWHM 1 5 GHz Frequency Gain Output ...

Page 10: ...r gain compared to other wavelengths such as the 1 15 μm and 3 39 μm lines Figure 6 HeNe Visible Laser Lines HeNe Polarization Unpolarized Randomly Polarized Beam The output of an unpolarized HeNe laser consists of a rapidly fluctuating linearly polarized beam whose polarization orientation changes on a nanosecond time scale Unpolarized lasers are ideal for applications where there are no polarizi...

Page 11: ... be anything rattling around inside the laser head Rarely during shipping the glass tube may break Figure 7 Laser System Shipping Inventory The equipment included in this shipment should match the packing slip attached to the box Verify that the correct product was shipped to you by matching the item number on the box If the shipment is incomplete or if an incorrect item was shipped to you please ...

Page 12: ... respectively The power supply does not need to be manually set for the appropriate regional current but the correct mains voltage cord must be used 2 Plug the three hole high voltage cable from the laser into the front of the power supply Confirm that the plug is well seated Failure to plug the connector all the way in can result in the laser failing to lase or arcing and damaging the power suppl...

Page 13: ... There is a 3 to 5 second CDRH safety delay before the voltage turns on Figure 8 Laser Rear Panel 3 Open the aperture by sliding the lever left so the ON label is visible Figure 9 Laser Shutter Control Picture shows the Shutter CLOSED 3 Port High Power Connector Power On Off Key Power ON OFF safety key Lever Slides Off On Power Mains Phono Plug Power On LED Lights when key switch is turned not whe...

Page 14: ...ole and set up the optical power meter to monitor the laser output power Carefully tighten one of the adjustment screws only enough to produce a measurable change in the laser output power If the laser power increases continue to tighten the screw until a maximum in the laser output is observed If the laser power decreases loosen the screw until the laser is at a maximum power Repeat this procedur...

Page 15: ... your local tech support office immediately The laser has low output power The laser requires 30 minutes to meet published specifications Make sure to let it warm up Make sure the laser is mounted correctly See page 12 for proper mounting techniques 6 2 Application Trouble Shooting Some sources of trouble for a HeNe laser do not come from the laser failing or being out of spec Instead these lasers...

Page 16: ... length is required Noise Oscillations and Fluctuation Sources There are many sources of noise oscillations and fluctuations of the output of a HeNe laser One of the most common is from longitudinal modes drifting into and out of the gain curve The frequency of these fluctuations vary from very slow less than a hertz to as much as several kHz depending on the stability of the environment Other mor...

Page 17: ...t1 0 2 mrad Long Term Beam Drift 0 05 mrad Longitudinal Mode Spacing 163 MHz Starting Voltage 10 kV DC Operating Voltage DC 3200 V Operating Current 9 00 mA Series Resistors in Housing 94 KΩ Shock 15 g for 11 msec CDRH CE Classification IIb 3B Weight 5400 g Fuse ACG 5 5 amp Listed 448H Min Fuse IR 10kA 125 VAC ACG 5 5 amp Listed 448H Min Fuse IR 200A 250 VAC 7 1 Mechanical Drawing Figure 10 Dimens...

Page 18: ... Electrical national law incurring dis bs electrical h the crossed te within the any or institu bled and not elf contained fer to other T eans assemb sembled by t it for waste r Your Own unit to Thorl in a litter bin nd s the environ irective is t to enforce t ative impacts Page 18 and Electro s Thorlabs sposal charg and electron d out wheel EC ute within the contaminate d operationa Thorlabs prod...

Page 19: ...A Canada and South America Thorlabs Inc sales thorlabs com techsupport thorlabs com Europe Thorlabs GmbH europe thorlabs com France Thorlabs SAS sales fr thorlabs com Japan Thorlabs Japan Inc sales thorlabs jp UK and Ireland Thorlabs Ltd sales uk thorlabs com techsupport uk thorlabs com Scandinavia Thorlabs Sweden AB scandinavia thorlabs com Brazil Thorlabs Vendas de Fotônicos Ltda brasil thorlabs...

Page 20: ...Thorlabs I 435 Route 20 Newton NJ 0 Phone 973 www thorlab Inc 06N 07860 USA 579 7227 F bs com ax 973 300 3600 ...

Page 21: ...fully and fully turning the plug counterclockwise 4 Turning on the Laser a Make sure the laser is pointing safely away from people and is securly on your work surface b Inert the safety key into the key hole and turn the switch on There is a 4 to 5 sec CDRH safety delay before the power supply comes on c Slide the shutter lever open d Some models may take up to 60 seconds to begin lasing After 20 ...

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