Fish & Richardson P.C.
Low-coherence reflectometer with polarization control
A photocoupler 3 splits the light from a low-coherence light source 1 into measuring light DL and local oscillator light KL. A photocoupler 5 receives measuring light DL arid is input to an optical circuit 7 to be measured. The photocoupler 5 splits the reflected light RL. A polarization controller 9 controls the state of polarization of the reflected light RL as split by the photocoupler 5. A photocoupler 13 allows local oscillator light KL to be incident on a reflector mirror 16 and splits local oscillator light KL. A photocoupler 11 combines the reflected light RL as controlled in the state of polarization by the polarization controller 9, with the local oscillator light KL.
Nippon Telegraph and Telephone Corporation Ando Electric Co., Ltd.
G
G01M
inventional
Kazumasa Tohru Tetsuo Shoichi Fumio
Takada Mori Yano Aoki Akikuni