Title:
WAVELENGTH CONVERSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/218646
Kind Code:
A1
Abstract:
Through the present invention, polarization-multiplexed incident light is wavelength converted collectively without an increase in the number of PPLN waveguide-type wavelength conversion means. Provided is a wavelength conversion system that has wavelength conversion means (203X, 203Y) comprising a nonlinear optical material and having a periodic polarization inversion structure, and that performs wavelength conversion collectively of polarization-multiplexed incident light in which a plurality of signal lights are included in each of an upper band and a lower band, the wavelength conversion system comprising a polarization separation means (201) for separating the incident light for each polarization and causing the separated incident light to be incident on the plurality of wavelength conversion means, and a polarization multiplexing means (205) for multiplexing the output from the plurality of wavelength conversion means, signal light and excitation light having orthogonal polarization axes being incident on the wavelength conversion means and turned back by difference frequency generation with a wavelength that is twice that of the excitation light as a center axis, and idler light having different polarization than the signal light before conversion being outputted.
Inventors:
KASHIWAZAKI TAKAHIRO (JP)
UMEKI TAKESHI (JP)
UMEKI TAKESHI (JP)
Application Number:
PCT/JP2022/020240
Publication Date:
November 16, 2023
Filing Date:
May 13, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G02F1/377
Foreign References:
| JP2000241841A | 2000-09-08 | |||
| JPH0933962A | 1997-02-07 | |||
| JP2016218173A | 2016-12-22 | |||
| US20020171913A1 | 2002-11-21 |
Other References:
UMEKI TAKESHI; KOBAYASHI TAKAYUKI; SANO AKIHIDE; IKUTA TAKUYA; ABE MASASHI; KAZAMA TAKUSHI; ENBUTSU KOJI; KASAHARA RYOICHI; MIYAMO: "Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty", 2019 24TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) AND 2019 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING AND COMPUTING (PSC), THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS (IEICE), 7 July 2019 (2019-07-07), pages 1 - 3, XP033608011, DOI: 10.23919/PS.2019.8818012
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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