Control polarization the precise way

Polarization-dependent effects often have undesirable effects in fiber-optic systems, such as polarization-dependent losses (PDL) in components and devices or the amplifier’s polarization dependence in EDFAs. You can control the polarization in two ways:

  • With “scrambling”, the polarization state of the light with high frequency changes. In other words, the light is more or less depolarized
  • Use polarization controllers if you would like a specific, fixed polarization state.

Polarization Controller (Motorized) – Bench-Top

The Properties:

  • All-fiber configuration
  • Low insertion loss <1 dB
  • Large wavelength range of 1,400 – 1,650 nm
  • Two and four-channel version
  • Automatic scan mode

 

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Specifications

   

 Single-Channel ModeTwo-Cascaded-Channels Mode
 2 Quarter-Wave Plates4 Quarter-Wave Plates

Wavelength range

1520 ~ 1620 nm1400 ~ 1650 nm

Insertion Loss

< 0.5 dB (< 0.23 dB typical)< 1.0 dB

Insertion Loss Variation

< ± 0.02 dB< ± 0.03 dB

Polarization Extinction Ratio

> 20 dB (> 25 dB typical)> 50 dB

Back Reflection

< -60 dB< -60 dB

Rotational Resolution

0.225°/step or 0.225° position0.225°/step or 0.225° position

Rotational Accuracy

± 0.225°± 0.225°

Rotational Speed

< 6000 steps per sec (1350°/sec)< 6000 steps per sec (1350°/sec)

 

Polarization Controller (Motorized) – Modules

The Properties:

  • All-fiber configuration
  • Low insertion loss <1 dB/li>
  • Automatic scan mode
  • Very compact
  • RS 232 interface

 

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Specifications

Operating Wavelength Range

1520 ~ 1620 nm

Insertion Loss

> 0.5 dB (<0.3 dB typical)

Insertion Loss Variation (during rotation)

< ±0.02 dB

Polarization Extinction Ratio

> 20 dB (> 25 dB typical)

Back Reflection

< -60 dB (without connector)

Rotational Resolution

0.225°/step

Rotational Accuracy

± 0.225°/step or 0.225°/position

Rotational Speed

< 7000 steps per sec. (1575°/sec)

Power Supply

12 V

 

Polarization Controller (Manual) – Miniature

The Properties:

  • All-fiber concept
  • Patented principle without squeezing the fiber
  • Super-compact
  • Easy to integrate
  • Low loss

 

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Specifications

 IPCMiniature IPC

Operating Wavelength Range

1520 ~ 1620 nm1520 ~ 1620 nm

Insertion Loss

< 0.5 dB (< 0.3 dB typical)< 0.5 dB (< 0.3 dB typical)

Polarization Extinction Ratio

> 20 dB (> 25 dB typical)> 20 dB (> 25 dB typical)

Back Reflection

< -60 dB (without connector)< -60 dB (without connector)

Dimensions (W x H x D)

88 x 17 x 19.5 mm88 x 6 x 10 mm

 

Polarization Controller (Manual) – Paddles

The Properties:

  • All-fiber configuration
  • Classic paddle set-up (“pig’s ears”)
  • Wavelengths: 830, 1,310, 1,550 nm
  • Simple
  • Affordable

 

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Polarization Scrambler – Bench-Top

The Properties:

  • All-fiber configuration
  • Swift scrambling at > 1 MHz
  • Central wavelengths: 980, 1,310, 1,480, 1,550, 1,570, 1,590 nm
  • Wide bandwidth > 40 nm
  • Low loss < 0.7 dB
  • Rack or module version optional

 

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Models 

 PS3000PS3100PS3200

Output DOP

< 5%< 5%< 5%

Polarization modulation frequencies

1310, 1480, 1550, 1590 nm1550, 1590 nm980, 1570 nm

Operating wavelength range

> 40 nm> 40 nm each> 80 nm

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