| 摘要 |
<p>A light source module and an optical amplifier used the light source module which prevents an internal optical oscillation being an unstable cause by making the reflection factor for the light of the same wavelength band as the signal light to be amplified low, at the optical amplification used a rare-earth doped optical fiber. The light of the signal light band to be amplified except a pumping light inputted from an optical fiber is reflected by an optical filter film coated at the end face of the optical fiber. The end face of the optical fiber is polished on a slant, therefore this reflected light becomes an emission mode and is emitted to the outside of the core of the optical fiber. Therefore, the reflection factor of the light of the signal light band to be amplified except the pumping light inputted from the optical fiber in the inside of the core of the optical fiber becomes much lower than the case that the optical fiber is simply polished on a slant and the inputting light to the rare-earth doped optical fiber becomes only the pumping light substantially and the stable amplification is able to be implemented. <IMAGE></p> |
