| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical transmission module in which the transmission quality of an optical signal is easily ensured regardless the wavelength intervals of the light emitted from respective lasers. SOLUTION: The optical transmission module 1 includes: a first semiconductor laser 22-1 which emits light having a first wavelength; a second semiconductor laser 22-2 which emits light having a second wavelength; and an optical filter 31-1. The optical filter 31-1 reflects the light having the first wavelength in a first polarization direction and transmits the light having the second wavelength in a second polarization direction. At least a portion of the light emitted from the first semiconductor laser 22-1 is made incident to the optical filter 31-1 in the first polarization direction and at least a portion of the light emitted from the second semiconductor laser 22-2 is made incident to the optical filter 31-1 in the second polarization direction. COPYRIGHT: (C)2010,JPO&INPIT
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