Hybrid integration of 1.3-μm transmitter and 1.55-μm receiver with fiber-embedded circuit

The high cost of manufacturing multiwavelength optical transmitter and receiver components is one of the biggest hindrances to widespread acceptance of wavelength-division multiplexing (WDM) optical subscriber loop networks for broadband multimedia systems. One proposed solution is to passively align laser diodes and photodiodes to waveguides in a circuit-like structure. We have previously proposed the use of a fiber-embedded circuit for a WDM receiver module. Because the fiber-embedded circuit is an in-line device, as opposed to a line-terminating device, this approach can be extended to include a passively aligned LD for the transmitter function. We demonstrate a novel WDM transceiver module with a hybridly integrated 1.3-μm laser diode and 1.55-μm PIN photodiode, which were passively aligned to a fiber-embedded circuit. Transmission output power >1.5 mW and detector responsivity of 0.8 A/W were obtained