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

Abstract

The invention belongs to the technical field of multi-channel optical transceiver. A thermally shielded multi-channel transmitter optical subassembly (TOSA) may be used in the 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. A plurality of laser array thermal shields are thermally coupled to a temperature control device, such as a thermoelectric cooler (TEC), and thermally shield the respective lasers in the laser array in separate thermally shielded compartments. Each of the lasers may also be individually thermally controlled to provide a desired wavelength, for example, using a heater and / or cooler located in each thermally shielded compartment. 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).

Description

[0001] Cross References to Related Patent Applications [0002] This application is a partial continuation of the US patent application (Application Serial No. 13 / 708,569) filed on December 7, 2012. The entire content disclosed in this US patent application will be fully incorporated by reference into this application. technical field [0003] The present invention relates to a multi-channel optical transmitter or transceiver, in particular to a multi-channel optical transmitting sub-module (TOSA) with thermal shielding function. Background technique [0004] With the advent of optical communication networks, it was once common to use "point-to-point" networks comprising transmitters and receivers connected via optical fibers. This kind of network is relatively easy to build, but it needs to deploy a large number of optical fibers to connect multiple users. As the number of users accessing the network increases, the number of optical fibers required also increases rapidly, m...

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Problems solved by technology

[0007] The above-mentioned optical line terminal transceiver module is faced with the following problems, how to control the temperature of the laser array and arrayed waveguide grating in a small space, and how to prevent the adverse effect of external heat on the laser wavelength under the condition of low energy consumption

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