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The coupler is a 1x2 780 nm 10/90 PM fused coupler
They create stress-induced birefringence within SM fiber by mechanically compressing the fiber
then useλ/2 is adjust polarization direction
Receiver Protection
It provides wide operating wavelength range
1x2 780 nm PM Filter Coupler, 10/90 Fiber Optic Isolator with PM Fiber The coupler is a 1x2The coupler offers very low insertion loss, high return loss and high extinction ratio. It can be used for fiber sensor, fiber optical instrument, EDFA & raman amplifier. FEATURES Low Insertion LossHigh Return LossHigh Extinction Ratio USE IN EDFA & Raman AmplifierFiber SensorFiber Optical Instrument Lead Time: 3 4 WeeksDatasheet
