The polarization independent optical isolator is a one-way fiber transmission line. It permits the flow of optical power in only one direction preventing reflections in the backward direction. Applications include protection of a transmitting laser diode from back reflections. Such reflections increase the noise in the system by disrupting the diode’s operation. The 1064-nm polarization independent optical isolator also improves the stability of fiber amplifiers by minimizing the possibility of feedback, which causes unwanted oscillations in such devices. Related Products ↓

Both PM and non-PM versions of these 1064nm fiber optical Isolators are available. For more details about the PM version, visit 1064nm polarization maintaining (PM) Isolator.

Basics of Polarization Independent Optical Isolator (1064nm)

The 1064nm polarization independent optical isolator is based on the nonreciprocal Faraday effect: a longitudinal magnetic field creates a circular birefringence that rotates the orientation of the incoming polarization.
 
Generally, 1064nm polarization independent optical isolator is placed at the output of the optical source in order to avoid reflections of light from returning back to the source avoiding in this way instabilities. Furthermore, 1064nm fiber optic isolators are used by the Doped Fiber Amplifiers with the aim of avoiding an oscillating behavior.
 

Fiber-Coupled 1064nm Polarization Independent Optical Isolator

A fiber-coupled optical isolator (1064nm) is a device that acts like an optical diode: it transmits well in one direction while blocking light in the other direction. Such isolators are also available in fiber-coupled form, i.e., with input and output coupled to single-mode fibers.
 
In contrast to most bulk devices, fiber-coupled isolators are often polarization-insensitive, i.e., they work for any polarization direction of the input. (This is particularly important for telecom applications, which usually require polarization-independent components.) Input light is split into two polarization components, which travel through the isolator on different paths but are combined again at the end.

 

Polarization Independent Optical Isolator (1064nm, up to 2W)

 

Polarization Independent Optical Isolator
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FEATURES OF POLARIZATION INDEPENDENT OPTICAL ISOLATOR

  • Polarization-Insensitive
  • Low Insertion Loss
  • High Isolation and Return Loss
  • High Reliability and Stability

APPLICATIONS OF POLARIZATION INDEPENDENT OPTICAL ISOLATOR

  • Fiber Amplifier
  • Fiber Laser
  • Testing Instruments
  • Mopa Fiber Laser

 

Specifications of Polarization Independent Optical Isolator
Center Wavelength (nm)1064
Operating Wavelength Range (nm)±5
Typ. Peak Isolation at 23 ℃ (dB)35
Min. Isolation at 23 ℃ (dB)28
Max. Insertion Loss at 23 ℃ (dB)1.7
Max. Insertion Loss at 23 ℃ and Input Power 300 mW (dB)2
Max. Insertion Loss at 23 ℃ and Input Power 1 W (dB)2.5
Max. Insertion Loss at 23 ℃ and Input Power 2 W (dB)3
Max. Polarization Dependent Loss at 23 ℃ (dB)0.2
Min. Return Loss (Input /Output) (dB)45
Max. Average Optical Power (W)2
Max. Peak Power for ns Pulse (kW)10
Max. Tensile Load (N)5
Operating Temperature (°C)+10 to +50
Storage Temperature (°C)0 to +60

Notes:

  • The polarization independent optical isolator is customizable, and the above specifications are subject to change without notice.
  • For device with connectors, IL is 0.3dB higher, RL is 5.0dB lower.
  • Bare fiber should not support the weight of the connector. So that if you need any connectors, it’s better to choose the 900μm loose tube jacket instead of the 250μm bare fiber.
  • For product customization, please contact our sales department for availability.

 

Package Dimensions

 

Polarization Independent Insensitive Fiber Optical Isolator

 

 

 

Ordering Information for Polarization Independent Optical Isolator
WavelengthFiber TypePackage DimensionPigtail TypeFiber LengthConnectorsAverage PowerPeak Power
1064nmHI106033x17x11.5 mm250μm bare fiber0.5 MeterNone1W10kW
SMF-28eSpecified900μm loose tube0.8 MeterFC/UPC2W20kW
1.0 MeterFC/APC
　 SpecifiedSC/UPC
SC/APC
LC/UPC
LC/APC
Others