United Optronics optical isolators enhance the performance of fiber optic systems by conveniently and effectively reducing optical feedback. They are a combination of a linear polarizer and a quarter wave retardation plate. Incident light is linearly polarized by the polarizer and converted to circular polarization by the quarter waveplate. If any portion of the emerging beam is reflected back into the isolator, the quarter wave plate produces a beam, which is linearly polarized perpendicular to the input beam. This beam is blocked by the linear polarizer and not returned to the input side of the system.

  • Wide operating wavelength range
  • Low insertion loss
  • High isolation
  • Ultra low PDL
  • Epoxy-free optical path


  • Long haul metropolitan and access networks
  • EDFAs
  • Fiber optic instruments
  • WDM and DWDM optical systems
  • Transmitters and fiber lasers
  • CATV fiber optic links

About Us

UOI’s Coarse Wavelength Division Multiplexer/Demultiplexer (CWDM) module is designed for low-cost multi-wavelength networks applications. With a pass-band of 13 nm and channel spacing of 20 nm

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1323 Great Mall Dr. Milpitas, CA 95035,