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Electro-Optic Phase Modulator

 

 

Page 13

 

15952-D02 Rev.B, 1/26/2012

 

Chapter 7  Regulatory 

As required by the WEEE (Waste Electrical and Electronic Equipment Directive) 
of the European Community and the corresponding national laws, Thorlabs offers 
all end users in the EC the possi

bility to return “end of life” units without incurring 

disposal charges. 

 

This offer is valid for Thorlabs electrical and electronic equipment: 

 

Sold after August 13, 2005  

 

Marked  correspondingly  with  the  crossed  out 
“wheelie bin” logo (see right) 

 

Sold to a company or institute within the EC  

 

Currently  owned  by  a  company  or  institute 
within the EC  

 

Still  complete,  not  disassembled  and  not 
contaminated 

As  the  WEEE  directive  applies  to  self-contained 
operational electrical and electronic products, this end of 
life take back service does not refer to other Thorlabs products, such as: 

 

Pure OEM products, that means assemblies to be built into a unit by the 
user (e.g. OEM laser driver cards)  

 

Components  

 

Mechanics and optics  

 

L

eft over parts of units disassembled by the user (PCB’s, housings etc.).   

If you wish to return a Thorlabs unit for waste recovery, please contact Thorlabs 
or your nearest dealer for further information. 

7.1.  Waste Treatment is Your Own Responsibility 

If  you 

do  not  return  an  “end  of  life”  unit  to  Thorlabs,  you  must  hand  it  to  a 

company specialized in waste recovery. Do not dispose of the unit in a litter bin 
or at a public waste disposal site. 

7.2.  Ecological Background 

It is well known that WEEE pollutes the environment by releasing toxic products 
during decomposition. The aim of the European RoHS directive is to reduce the 
content of toxic substances in electronic products in the future. 

The  intent  of  the  WEEE  directive  is  to  enforce  the  recycling  of  WEEE.  A 
controlled recycling of end of life products will thereby avoid negative impacts on 
the environment.  

Wheelie Bin Logo 

Summary of Contents for EO-PM-NR-Cx

Page 1: ...EO PM NR Cx EO PM R 20 Cx Electro Optic Phase Modulator Operating Manual ...

Page 2: ...and Maintenance 9 4 1 Cleaning the Optics 9 4 2 Cleaning the Modulator Housing 9 Chapter 5 Mechanical Drawings 10 Chapter 6 Warranty Information 11 6 1 General Product Warranty 11 6 2 Opto Mechanics 11 6 3 Optical Tables and Breadboards 11 6 4 Lasers and Imaging Systems 11 6 5 Opto Electronics Control Electronics Optics and Non Positioning Product Lines 11 6 6 Warranty Exclusions 12 Chapter 7 Regu...

Page 3: ...ill also occur but with approximately 30 less efficiency than for vertical polarization r13 r33 30 for Lithium Niobate If the input polarization is at 45 the output polarization will undergo a change from linear to elliptical In this mode the modulator can be considered an electronically tunable waveplate 1 2 EO Phase Modulator Versions Thorlabs offers the EO phase modulators in two basic versions...

Page 4: ...ed mounting holes on bottom Custom OEM versions available 1 4 EO PM Specifications Specification Value Modulator Crystal MgO Doped Lithium Niobate LiNbO3 Wavelength Range C1 600 to 900 nm C2 900 to 1250 nm C3 1250 to 1650 nm C4 400 to 600 nm Clear Aperture 2 mm diameter Input Connector SMA Female Halfwave Voltage V Non Resonant 135 V 633 nm See Figure 1 Halfwave Voltage V Resonant 15 V 633 nm Inpu...

Page 5: ...r 1 Description Page 4 0 50 100 150 200 250 300 350 400 450 400 600 800 1000 1200 1400 1600 Half Wave Voltage Wavelength nm EO PM Halfwave Votage vs Wavelength Non Resonant Resonant Figure 1 Halfwave Voltage ...

Page 6: ...e frequency as the modulating signal This phase modulation will result in a frequency modulation of the optical signal If the frequency modulated signal is viewed with a spectrum analyzer i e with Thorlabs Scanning Fabry Perot Interferometer a series of sidebands can be easily observed These sidebands are an infinite series with each pair of sidebands spaced symmetrically about the fundamental wit...

Page 7: ...is transferred from the fundamental to the sidebands Figure 3 Typical Setup for Sideband Generation Showing FM Sidebands Thorlabs Fabry Perot NOVA PHASE Electro Optic Phase Modulator Laser Glan Thompson Polarizer EO Phase Modulator RF Drive Signal Interferometer Spectrum Analyzer Output THORLABS Electro Optic Phase Modulator ...

Page 8: ...l oscilloscope trace from the output of a scanning Fabry Perot spectrum analyzer The modulator was a resonant mode EO PM operating at 30 MHz and being driven from 8 Vpeak sine wave Note the suppression of the fundamental center band indicating a very good depth of modulation 2 1 rad Figure 4 Sideband Generation Sample ...

Page 9: ...ractive effects which lead to color center formation and progressively increasing absorption Photorefractive damage is noted by increase scattering and absorption in the optical path along with gray appearance in the crystal gray tracking Photorefractive limits are a concern in the visible region 400 700 nm particularly with frequency doubled lasers The lithium niobate crystals in Thorlabs EO modu...

Page 10: ...tle stream of compressed air dry nitrogen under low pressure or a can of compressed air made specifically for cleaning optics WARNING Damage may result from excessive cleaning air pressure or if condensation is allowed to build up from using a stream of compressed air from an inverted can 4 2 Cleaning the Modulator Housing The housing can be wiped clean with a lint free rag wetted with propanol or...

Page 11: ...Chapter 5 Mechanical Drawings Page 10 Chapter 5 Mechanical Drawings ...

Page 12: ...be free from defects in workmanship including de lamination of the skins under normal use and handling 6 4 Lasers and Imaging Systems Thorlabs offers a one year warranty on all lasers and imaging systems with the exceptions of laser diodes Some products are warranted for the number of hours specified in the operating manual of each laser 6 5 Opto Electronics Control Electronics Optics and Non Posi...

Page 13: ... sensitive items whose static protection packaging has been opened c items repaired modified or altered by any party other than Thorlabs d items used in conjunction with equipment not provided by or acknowledged as compatible by Thorlabs subjected to unusual physical thermal or electrical stress f damaged due to improper installation misuse abuse or storage g damaged due to accident or negligence ...

Page 14: ...s products such as Pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards Components Mechanics and optics Left over parts of units disassembled by the user PCB s housings etc If you wish to return a Thorlabs unit for waste recovery please contact Thorlabs or your nearest dealer for further information 7 1 Waste Treatment is Your Own Responsibility If...

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Page 16: ...www thorlabs com ...

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