COOLING OF OPTICAL TRANSMITTER MODULES

摘要

This invention relates to an arrangement for efficient cooling of an optical transmitter module (200). This is achieved by separating the cooling of the laser unit (220) from the cooling of the driver unit (210). According to a first embodiment of the invention, two separate heat sinks (271, 272) which are thermally insulated from each other are used. At least one first heat sink (271) cools the driver unit (210) and operates at a rather high temperature, and at least one second heat sink (272) cools the laser unit (220) and operates at a much lower temperature. In a second embodiment of the invention, the driver unit and the laser unit are mounted on the same carrier, the laser unit being separated from the carrier by at least one thermal insulator.