| 摘要 |
PROBLEM TO BE SOLVED: To provide an ASE light source that is composed of a pumping light source of 1,480 nm band, an erbium-added optical fiber which generates ASE light of 1,580 nm band when the pumping light is made incident to the fiber, a reflecting means which is positioned to one end of the erbium-added optical fiber and reflects part or all of ASE light radiated from the erbium-added optical fiber, an optical multiplexer/demultiplexer which multiplexes and demultiplexes the pumping light and ASE light, and an optical isolator which removes the light returning to the erbium-added optical fiber and is increased in output and widened in range than the conventional ASE light source. SOLUTION: The optical multiplexer/demultiplexer is a fiber-fused extended type multiplexer/demultiplexer, and the central wavelength of the pumping light incident end of the multiplexer/demultiplexer is adjusted to≤1,480 nm. COPYRIGHT: (C)2006,JPO&NCIPI |
