Polarization Maintaining Couplers

Evanescent Optics Inc. offers low loss (<0.1dB), high isolation (<-25dB) PM fiber-optic couplers in both fixed ratio and variable models. Our small footprint couplers, splitter/combiners and other components can be configured as NxM port, splice free coupler arrays and as custom assemblies fabricated for high ER and low loss. Operating wavelengths of 488nm to 2um and custom pigtail lengths available.


NxM Arrays, WDM's, Taps, Polarization Splitters, Variable Couplers
  • Ultra-low loss (<0.1dB excess loss, -70dB typical return loss)
  • High isolation (-22db to >-30dB, typical -25dB)
  • High power-handling (approaching that of the fiber itself)
  • Wavelengths of 0.488 to 2 microns
  • Zero PDL Coupling Ratio the same on fast and slow axis
  • Any ratio possible, as well as Variable-ratio model
  • Available in cascaded arrays, splice free

Our Manufacturing techniques allow multiple coupler halves to be produced along a single fiber so that splices are not required for many applications. Cross coupling of polarization modes in the fast and slow axes in PM fiber components (ER) is a major cause of performance deterioration using coherent lasers and can be minimized by eliminating the contribution of splices.

Other products include Piezoelectric fiber stretchers, electronic and opto-electronic controllers and non-contact linear displacement metrology - PD-1001

Applications are varied and include Laser light delivery systems, Interferometers, Amplifiers, Quantum Optics, Magneto Optical Trapping, Fiber Gyros, Polarization Diversity Receivers and Laser Radar