Patent ID: 9195015
Filing Date: 2015-11-24
Classification: G02B

Abstract:
1. An optical transceiver, comprising: a) a laser diode; b) a photodiode; c) a first lens in an optical path of the optical transceiver; d) a second lens in the optical path of the optical transceiver, wherein the photodiode is at a focal point of the second lens; e) an optical splitter between the first lens and the second lens, having a first surface facing the laser diode, and a second surface facing the photodiode, wherein the first lens, the second lens, the laser diode, and the optical splitter share a common linear optical axis; f) a transmission increasing film on the first surface or the first lens; g) a reflection increasing film on the second surface or the second lens; and h) a housing with (i) a photodiode mounting hole configured to receive the photodiode and (ii) an internal cavity configured to house the first lens, the second lens and the optical splitter, wherein the housing has upper and lower walls defining the internal cavity, the upper wall has fillets at an interface with a passage between the internal cavity and the photodiode mounting hole, the fillets being configured to secure the second lens in place in the internal cavity, the lower wall has at least one slot or fillet configured to mount the first lens thereon, and a distance between the upper and lower walls is less than or equal to a diameter of each of the first and second lenses.