| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photodetector module at low cost wherein the range of an optical signal intensity which can be acted is wide. <P>SOLUTION: The photodetector module is provided with a first connector with which a first optical fiber is connected, a first attenuator which attenuates a light from the first optical fiber and leads a part of it to a light receiving element, a second connector with which a second optical fiber is connected, a second attenuator which attenuates a light of the second optical fiber and leads a part of it to the first attenuator, and an amplifier which is connected with the light receiving element. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
