Free Space Optical Isolator-U Type

Free Space optical isolator is a passive magneto-optic device which transmits light in a certain direction while blocking light in the opposite direction. Faraday Isolators are based on Faraday rotators and Faraday effect and constitute the technologically most important type of optical isolator. Optical isolator is widely used in applications that to avoid unwanted light feedback.

The simplest type of Polarization-sensitive Faraday Isolators is comprised of a Faraday rotator with magnet, input polarizer and output polarizer. The input polarizer is arranged to act as a filter and only allows linearly polarized light into the rotator. The rotator then rotates the polarization of the input light by 45 degrees and is allowed to exit through the output polarizer.


  • High Isolation
  • Low Insertion Loss
  • High Reliability
  • RoHS complaint
  • Compact Size
  • Optimized for different wavelengths


  • Transmitter Optical Sub Assembly(TOSA)
  • Bi-Directional Optical Sub Assembly(BOSA)
  • GPON/EPON OLT Module
  • Optical transmitters and transceivers
  • Optical sensor
  • Laser diode packaging
  • Tunable Laser Module


Product Center Wavelength (λc)(nm) Isolation (λc 23℃)(dB) Insertion Loss (λc 23℃)(dB) Clear Aperture(mm) Operating Temperature
Storage Temperature
Max. Optical Power
Single Stage Dual Stage Single Stage Dual Stage
Free Space Isolator 1270-1650 >35 >55 <0.3 <0.5 Φ0.4~3.0 -40 to 85 -40 to 85 300
SMT Free Space Isolator >35 >50 <0.3 <0.6 Φ0.4~3.0 -40 to 85 -40 to 85 300
Latching Isolator Core >30 >50 <0.3 <0.6 Φ0.4~1.0 -40 to 85 -40 to 85 300

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