Title:
EXCITATION LIGHT GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/240643
Kind Code:
A1
Abstract:
The present invention discloses a configuration of an excitation light generation device in which excitation light having an excellent SN ratio is provided to a PSA. Furthermore, the present invention also discloses a configuration of a relay amplifier of a PSA including an excitation light generation device. The disclosures below include an excitation light generation device, and a light amplification device and a light transmission system that include the excitation light generation device. More specifically, the present invention discloses an excitation light generation device that retains the SN ratio of excitation light in a high state, relative to excitation light produced using an optical phase-locked loop (OPLL), by using a photo-responsive amplification function. Due to this excitation light generation device, producing locally oscillated excitation light having a sufficiently high SN ratio in which an OPLL is used enables a low-noise operation essential to a PSA even with respect to signal light having a high SN ratio in a relay-type PSA. This excitation light generation device expands the range of application of PSA, which serves as a key to improving the SN ratio necessary for transmitting high-capacity light.
Inventors:
KAZAMA TAKUSHI (JP)
KASHIWAZAKI TAKAHIRO (JP)
TADANAGA OSAMU (JP)
EMBUTSU KOJI (JP)
KASAHARA RYOICHI (JP)
UMEKI TAKESHI (JP)
KOSHOBU NOBUTATSU (JP)
KASHIWAZAKI TAKAHIRO (JP)
TADANAGA OSAMU (JP)
EMBUTSU KOJI (JP)
KASAHARA RYOICHI (JP)
UMEKI TAKESHI (JP)
KOSHOBU NOBUTATSU (JP)
Application Number:
PCT/JP2019/020823
Publication Date:
December 03, 2020
Filing Date:
May 27, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S3/10; G02F1/377; G02F1/39
Foreign References:
JP2019004253A | 2019-01-10 | |||
JP2019002975A | 2019-01-10 | |||
JP2018207362A | 2018-12-27 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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