| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical transmission module which can be set easily in an optical transmission system by suppressing a variation in the light receiving current of a light receiving element. <P>SOLUTION: The optical transmission module comprises a lens 20 for converting laser light emitted from the other end face of a light emitting element 16 into pseudo-parallel light, a beam splitter 22 for branching the laser light, a first light receiving element 23 for receiving the one branched laser light, a second light receiving element 24 for receiving the other branched laser light, a first optical filter 25 disposed between the beam splitter 22 and the first light receiving element 23 and passing only a laser light of a specified wavelength band, and a second optical filter 26 disposed between the beam splitter 22 and the first light receiving element 23 and passing only a laser light of a specified intensity. A light receiving current of the first light receiving element 23 having a specified level regulated by the second optical filter 26 is supplied to a means 27 for controlling the wavelength of the laser light. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
