Thermally isolated multi-channel transmitter optical subassembly and optical transceiver module including same

摘要

A thermally isolated multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The multi-channel TOSA generally includes an array of lasers optically coupled to an arrayed waveguide grating (AWG) to combine multiple optical signals at different channel wavelengths. The lasers, and possibly other components, are wire bonded to a thermal isolation bar. The thermal isolation bar provides an electrical connection to external circuitry and is thermally coupled to a temperature control device, such as a thermoelectric cooler (TEC). Thus, the thermal isolation bar electrically connects the lasers to the circuitry while preventing external heat from being conducted to the lasers from outside the TOSA. The optical transceiver may be used in a wavelength division multiplexed (WDM) optical system, for example, in an optical line terminal (OLT) in a WDM passive optical network (PON).

主权项

1. A multi-channel transceiver module comprising:
a transceiver housing; a thermally isolated multi-channel transmitter optical subassembly (TOSA) located in the transceiver housing, the TOSA being configured to transmit a wavelength division multiplexed (WDM) optical signal on multiple channel wavelengths, the TOSA comprising:
an array of lasers configured to generate laser light, wherein each of the lasers is associated with different respective optical channels;a temperature control device; anda thermal isolation bar thermally coupled to the temperature control device, wherein the thermal isolation bar is wire bonded to the lasers and electrically connected to circuitry outside of the TOSA such that the thermal isolation bar electrically connects the lasers to the circuitry outside of the TOSA while preventing external heat from being conducted to the lasers from outside the TOSA; and a multi-channel receiver optical subassembly (ROSA) located in the transceiver housing, the ROSA being configured to receive a wavelength division multiplexed (WDM) optical signal on multiple channel wavelengths.