Design, fabrication, and test of wide‐angle low‐loss Y‐junction hybrid polymer couplers

Optical couplers are key components for signal distribution in optoelectronic transmitter/receiver modules. A new low‐loss large‐angle Y‐junction hybrid polymer optical coupler incorporating an integrated microprism has been fabricated and demonstrated experimentally for use in a mixed‐signal module environment. The results show that the radiation loss is small with relatively wide branching angle as compared to a conventional Y‐junction coupler.