Bi-directional and multi-channel optical module with single cavity accommodating both optical transmitter and receiver assemblies

A bi-directional and multi-channel optical module, comprising:

• a casing;
• an optical transmitter assembly disposed in an accommodation space of the casing, wherein the optical transmitter assembly comprises a plurality of light emission units, a wavelength division multiplexer disposed corresponding to the plurality of light emission units, and a lithium niobate modulator disposed corresponding to at least one of the plurality of light emission units;
• an optical receiver assembly, disposed in the accommodation space, wherein the optical receiver assembly comprises a plurality of light receiving units and a wavelength demultiplexer disposed corresponding to the plurality of light receiving units;
• and
• an optical fiber adaptor disposed on the casing;
• wherein the plurality of light emission units comprises an electro-absorption modulated laser emitter (EML), a direct modulated laser emitter (DML) and a continuous wave (CW) laser emitter, and the lithium niobate modulator is disposed corresponding to the CW laser emitter.