| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crosstalk improved module capable of easily obtaining the high stability of light output by improving crosstalk at a final stage where crosstalk deterioration is found in a light measuring device for polarization holding fiber (PMF) output or a light source. <P>SOLUTION: The crosstalk module intervening between a 1st polarization holding fiber 1 and a 2nd polarization holding fiber 2 is equipped with a 1st lens 3 changing an output light beam from the fiber 1 to parallel beams, a polarizer 4 segmenting the parallel beams to a linearly polarized light beam, a branching element 6 branching the output light beam from the polarizer, a 2nd lens 5 condensing either branched light beam branched by the branching element and outputting it to the fiber 2, and a photodetector 7 receiving the other branched light beam branched by the branching element. <P>COPYRIGHT: (C)2004,JPO |
