| 摘要 |
PROBLEM TO BE SOLVED: To provide a small and strong multiplexer/demultiplexer. SOLUTION: The retro-reflective multi-part optic fiber device 100 is composed of three input/output optical fibers, which consists of a common input pigtail fiber 18, a retro-reflective transmission output fiber 22 and a reflection output fiber 20, a triple-fiber ferrule 10 for storing these three fibers, a GRIN rod lens 12, a WDM filter 14 and a reflection mirror 16. Coupled-in light from the common input pigtail fiber 18 is collimated and transmitted to the WDM filter 14. In this case, a part of the in-pass-band light with regard to the WDM filter 14 transmits through the WDM filter 14, is retro-reflected by the mirror 16 and transmitted through the WDM filter 14 again. The retro-reflected in-pass- band light is coupled to the retro-reflective transmission output fiber (port) of the triple-fiber ferrule 10 as a demultiplexed channel.
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