| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength multiplexed light coupler that has a high isolation and that can be used for separation of multi-wavelength of three or more wavelengths, in an optical coupler in which a bandpass filter is inserted between a double-core collimator composed of two optical fibers and a collimator lens and a single-core collimator composed of one optical fiber and a collimator lens. SOLUTION: Between the first face of a lens 31 and each end face of a set of outgoing light optical fibers 24, 25, in which light reflected by each optical filter of first optical filter groups 41, 42 is coupled, there are arranged second optical filter groups 43, 44 that transmit a prescribed range of wavelengths. COPYRIGHT: (C)2005,JPO&NCIPI |
