Title:
POLARIZATION MULTIPLEXED LIGHT TRANSMISSION/RECEPTION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/196216
Kind Code:
A1
Abstract:
Provided is a polarization multiplexed light transmission/reception circuit with which it is possible to compensate for PDL on the transmission side having mitigated a decrease in transmission power, and to make variable the branching ratio of light from a light source with respect to a transmission side and a reception side, depending on the system used. The polarization multiplexed light transmission/reception circuit is provided with: a light variable branching circuit (202) which branches light output from a light source; a light fixed symmetric branching circuit (204) connected to one output of the variable light branching circuit and a light fixed asymmetric branching circuit (206) connected to the other output thereof; optical receivers (106, 108) respectively connected to two outputs of the light fixed symmetric branching circuit; optical transmitters (156, 158) connected to two outputs of the light fixed asymmetric branching circuit; a polarization rotator (164) connected to one of the optical transmitters; and a polarization combiner (166) which polarization-combines the outputs of the optical transmitters.
Inventors:
NASU YUSUKE (JP)
YAMANAKA SHOGO (JP)
IKUMA YUICHIRO (JP)
YAMANAKA SHOGO (JP)
IKUMA YUICHIRO (JP)
Application Number:
PCT/JP2020/012172
Publication Date:
October 01, 2020
Filing Date:
March 19, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/40; G02F1/225; G02F2/00; H04J14/06
Domestic Patent References:
| WO2016166971A1 | 2016-10-20 |
Foreign References:
| JP2017098362A | 2017-06-01 | |||
| JP2018186414A | 2018-11-22 | |||
| JP2018116199A | 2018-07-26 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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