Polarization Maintaining Long Period Gratings

Band-rejection filters based on polarization-maintaining long-period gratings have low insertion loss for transmission band and minimum polarization extinction ratio of 20 dB. Their central wavelength and rejection bandwidth can be precisely adjusted. Their applications includes lasers and amplifiers, where the pump wavelength and effects such as ASE noise can be blocked while allowing the emitted signal to pass unchanged, or in telecommunications.

Technical Data