Abstract: An integrated and compact multifunctional optical isolator (i.e., a combined splitter, isolator, and spot-size converter), which is suitable for use in a TOSA, includes input optics including a first polarizer, a Faraday rotator, and a second polarizer. The input optics include a wedge having a partially reflective coating disposed on a first face thereof. The input beam is incident on the first face at a non-normal angle of incidence such light passing through the wedge is refracted to a second face of the wedge, which is tilted relative to the first face by a predetermined wedge angle. At least one of the non-normal angle of incidence and the predetermined wedge angle is determined dependence upon a refractive index of the wedge material and a target anamorphic magnification of the input beam of light.

Abstract: An integrated and compact multifunctional optical isolator (i.e., a combined splitter, isolator, and spot-size converter), which is suitable for use in a TOSA, includes input optics including a first polarizer, a Faraday rotator, and a second polarizer. The input optics include a wedge having a partially reflective coating disposed on a first face thereof. The input beam is incident on the first face at a non-normal angle of incidence such light passing through the wedge is refracted to a second face of the wedge, which is tilted relative to the first face by a predetermined wedge angle. At least one of the non-normal angle of incidence and the predetermined wedge angle is determined dependence upon a refractive index of the wedge material and a target anamorphic magnification of the input beam of light.

Abstract: A compact PD unidirectivity solution for an optical tap monitor, which reduces the overall size of optical tap module, is provided. The solution is to use lensing to separate the light from the input and output fibers, and then add a mask or spacer in front of the monitor PD to prevent any of the light from the output fiber from entering the photodetector package.

Abstract: A compact PD unidirectivity solution for an optical tap monitor, which reduces the overall size of optical tap module, is provided. The solution is to use lensing to separate the light from the input and output fibres, and then add a mask or spacer in front of the monitor PD to prevent any of the light from the output fiber from entering the photodetector package.