| 摘要 |
The invention provides an optical transmitter module which is smaller and has a higher performance, which can improve the reliability and which can be manufactured at lower costs and allows for stable laser transmission of an optical semiconductor element. The optical transmitter module comprises an optical semiconductor element (1), an optical fiber (3) optically coupled to the optical semiconductor element (1), an inline optical isolator (4) provided for the optical fiber (3), and a package case (7) containing the optical semiconductor element (1) and the optical fiber (3), includes a substrate member (5) with one end of the optical fiber (3) on the light incident side fixed thereon to be optically coupled to the optical semiconductor element (1), a thermoelectric cooler (6) with the substrate member (5) joined to the top surface thereof, and a pipe-like support member (10) projecting from the side face of the package case (7) for fixing the optical isolator (4). <IMAGE>
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