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Manual Fiber Polarization Controllers

 

Chapter 3: Setup 

Page 10 

 

1167-D02

 

Chapter 3  Setup 

3.1.  Loading the Fiber 

3.1.1. 

3-Paddle Fiber Polarization Controllers 

The FPC030 and FPC560 do not come with fiber and we recommend using 
at least 2 m of fiber. The controller can accept bare fiber or a jacket up to 
Ø900 µm. 

1.  Loosen the spool covers on each paddle. Each end of the fiber 

polarization controller (FPC) also has a rectangular clamp held in place 
by two phillips head screws (Figure 7).  Remove one screw and loosen 
the other.  This should allow a jacketed fiber to be slipped into the clamp. 

2.  Position the Paddles horizontally so that the groove loops are facing up. 

The straight parts of the grooves in the paddles should be aligned with 
the grooves in the top of the paddle supports of the base. 

3.  Lay the fiber in one end of the FPC and continue to lay the fiber along the 

grooved path, with the number of desired loops per paddle, until the fiber 
is through the other end of the FPC. The fiber should be in contact with 
the inside of the groove loops, but not be pulled too snug against the 
groove as this will cause optical losses due to induced birefringence as 
the paddles are rotated with respect to each other. 

4.  Make sure that the fiber is sitting in the groove inside each clamp, replace 

the second screw, and gently tighten the clamp to hold the fiber in place. 

NOTE: The ends of the FPC are designed to ‘clamp’ onto 900 µm 
diameter protective tubing.  If the fiber placed into the FPC does not have 
a protective jacket, pieces of a soft material, such as foam, can be 
inserted into the end clamps to prevent the fiber from loosening in the 
paddles.  The fiber should be held ‘gently’ enough so that the fiber is not 
drawn into the FPC, but there should be minimal force applied to the fiber 
such that additional birefringence is not induced. 

5.  Gently tighten the screws that hold the spool covers in place. 

 

Figure 7  Top View of FPC030 

Spool Cover 

Clamp 

Содержание FPC020

Страница 1: ...Manual Fiber Polarization Controllers User Guide ...

Страница 2: ...ntrollers 6 2 3 Recommended Number of Loops 8 Chapter 3 Setup 10 3 1 Loading the Fiber 10 3 1 1 3 Paddle Fiber Polarization Controllers 10 3 1 2 Miniature 2 Paddle Fiber Polarization Controllers 11 3 2 Removing the Fiber All Models 11 Chapter 4 Specifications 12 4 1 3 Paddle Polarization Controllers 12 4 2 Miniature 2 Paddle Polarization Controllers 14 Chapter 5 Regulatory 16 Chapter 6 Thorlabs Wo...

Страница 3: ...ice Symbol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or Chassis Terminal Equipotentiality On Supply Off Supply In Position of a Bi Stable Push Control Out Position of a Bi Stable Push Control Caution Risk of Electric Shock Caution Hot Surface Caution Risk of Danger Warning Laser Radiation Caution Spi...

Страница 4: ... arbitrary input polarization state into an arbitrary output polarization state a combination of three paddles a quarter wave plate a half wave plate and a quarter wave plate or two paddles quarter wave plate and a quarter wave plate is used The retardance of each paddle may be estimated from the following equation 2 Here φ is the retardance a is a constant 0 133 for silica fiber N is the number o...

Страница 5: ...te and the last quarter wave plate would transform the linear state into an arbitrary polarization state Therefore adjusting each of the three paddles fiber retarders allows complete control of the output polarization state over a broad range of wavelengths from 300 to 2100 nm The 3 paddle polarization controllers are available with paddles that support either Ø27 mm loops or Ø56 mm loops Using FP...

Страница 6: ...Manual Fiber Polarization Controllers Chapter 2 General Description Page 4 1167 D02 Figure 1 Figure 2 ...

Страница 7: ...September 11 2018 Page 5 Figure 3 and Figure 4 show the results for Ø80 µm and Ø125 µm clad fiber respectively for the FPC560 controller which has three paddles with a loop diameter of 56 mm The larger loop diameter is ideal for fibers with higher bend loss Figure 3 Figure 4 ...

Страница 8: ...e polarization will be coupled between the two paddles These controllers allow complete control of the output polarization state over a broad range of wavelengths 300 to 2100 nm The retardation per paddle is a function of loop number and the cladding diameter of the fiber if the loop diameter is fixed The retardation in radians is plotted for 1 2 3 and 4 loops per paddle for a fiber with cladding ...

Страница 9: ...Manual Fiber Polarization Controllers Chapter 2 General Description Rev H September 11 2018 Page 7 Figure 5 Figure 6 ...

Страница 10: ... several solutions to the equations Order m Quarter Wave Plate Retardation Half Wave Plate Retardation Zero 0 2 1 57 3 14 1st 1 3 2 4 71 3 9 42 2nd 2 5 2 7 85 5 15 71 3rd 3 7 2 11 00 7 21 99 4th 4 9 2 14 14 9 28 27 5th 5 11 2 17 28 11 35 56 The retardation of each paddle should be close to any number above The paddle rotation sensitivity should also be taken into consideration when determining the...

Страница 11: ...3 loops 6 loops 2 loops 780HP SM800 5 6 980 nm 2 loops 3 loops 2 loops 980HP HI1060 J9 HI980 J9 1060 nm 2 loops 3 loops 2 loops 980HP HI1060 J9 HI980 J9 1310 nm 3 loops 2 loops 3 loops SMF28e and CCC1310 J9 These combinations come close to the desired half wave retardation Wavelength of Loops for 1 2λ Retardation Recommended Fiber Ø18 mm Ø27 mm Ø56 mm 480 nm 2 loops 3 loops 2 loops 460HP S450 S460...

Страница 12: ...grooved path with the number of desired loops per paddle until the fiber is through the other end of the FPC The fiber should be in contact with the inside of the groove loops but not be pulled too snug against the groove as this will cause optical losses due to induced birefringence as the paddles are rotated with respect to each other 4 Make sure that the fiber is sitting in the groove inside ea...

Страница 13: ...into each paddle End by bringing the fiber out the other end of the FPC Make sure to wind the fiber snuggly against the inner wall of each spool but do not make the fiber taught 4 Making sure the fiber is seated in the groove tighten the clamp screws a at each end Be careful not to clamp too tightly or make the fiber too taught as this will introduce extra loss into the fiber Tighten the paddle sc...

Страница 14: ...talled Item FPC030 FPC031 FPC032 Paddle Material Black Delrin Number of Paddles 3 Loop Diameter 1 06 27 mm Paddle Rotation 117 5 Foot Print L x W 8 5 x 1 0 215 9 mm x 25 4 mm Fiber None CCC1310 J9 Operating Wavelength Rangea N A 1260 1625 nm Design Wavelengthb N A 1310 nm Mode Field Diameter N A 8 6 0 4 µm 1310 nm 9 7 0 5 µm 1550 nm Cladding Diameter N A 125 0 7 µm Coating Diameter N A 242 5 µm Tu...

Страница 15: ...61 FPC562 Paddle Material Black Delrin Number of Paddles 3 Loop Diameter 2 2 56 mm Paddle Rotation 117 5 Foot Print L x W 12 5 x 1 0 317 5 mm x 25 4 mm Fiber None SMF 28 J9 Operating Wavelength Rangea N A 1260 1625 nm Design Wavelengthb N A 1310 nm Mode Field Diameter N A 9 2 0 4 µm 1310 nm 10 4 0 5 µm 1550 nm Cladding Diameter N A 125 0 7 µm Coating Diameter N A 242 5 µm Tubing Diameter N A Ø900 ...

Страница 16: ...C022 Paddle Material Black Delrin Number of Paddles 2 Loop Diameter 0 71 18 mm Paddle Rotation 143 Foot Print L x W 3 06 x 0 5 77 72 mm x 12 70 mm Fiber None SM450 SM600 Operating Wavelength Rangea N A 450 600 nm 600 800 nm Design Wavelengthb N A 488 nm 633 nm Mode Field Diameter N A 3 3 µm 488 nm 3 4 µm 514 nm 4 3 µm 633 nm 4 6 µm 680 nm Cladding Diameter N A 125 1 0 µm Coating Diameter N A 245 1...

Страница 17: ...ter 0 71 18 mm Paddle Rotation 143 Foot Print L x W 3 06 x 0 5 77 72 mm x 12 70 mm Fiber 780HP HI1060 CCC1310 Operating Wavelength Rangea 780 970 nm 980 1650 nm 1260 1625 nm Design Wavelengthb 780 nm and 850 nm 980 nm 1310 nm Mode Field Diameter 5 0 0 5 µm 850 nm 5 9 0 3 µm 980 nm 6 2 0 3 µm 1060 nm 8 6 0 4 µm 1310 nm 9 7 0 5 µm 1550 nm Cladding Diameter 125 1 5 µm 125 0 5 µm 125 0 7 µm Coating Di...

Страница 18: ...er 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 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 Waste Treatment is Your Own Responsibil...

Страница 19: ... 99 www thorlabs de Email europe thorlabs com Scandinavia Thorlabs Sweden AB Bergfotsgatan 7 431 35 Mölndal Sweden Tel 46 31 733 30 00 Fax 46 31 703 40 45 www thorlabs com Email scandinavia thorlabs com France Thorlabs SAS 109 rue des Côtes 78600 Maisons Laffitte France Tel 33 0 970 444 844 Fax 33 0 825 744 800 www thorlabs com Email sales fr thorlabs com Brazil Thorlabs Vendas de Fotônicos Ltda R...

Страница 20: ...www thorlabs com ...

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