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Title:
OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/223550
Kind Code:
A1
Abstract:
Provided is an optical device having a long life and high reliability. An optical device (200) according to one embodiment comprises at least one Mach-Zehnder (MZ) type modulator (201) and a redundant semiconductor optical amplifier (SOA) (202). The redundant SOA (202) is connected to the at least one MZ-type modulator (201) through a 2-input 2-output coupler (203). The redundant SOA (202) includes two SOAs (206a, 206b) arranged in parallel, and the two SOAs (206a, 206b) are arranged in two waveguides (205a, 205b), respectively, that are connected to the 2-input 2-output coupler (203). The redundant SOA (202) is configured to switch between the two SOAs (206a, 206b) to amplify light modulated or non-modulated by the at least one MZ-type modulator (201).

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Inventors:
KIKUCHI KIYOFUMI (JP)
NASU YUSUKE (JP)
KAWAMURA YURIKO (JP)
Application Number:
PCT/JP2022/020971
Publication Date:
November 23, 2023
Filing Date:
May 20, 2022
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G02F1/025; G02F1/313
Foreign References:
JP2006259600A2006-09-28
JPH06313819A1994-11-08
JP2019074642A2019-05-16
JP2012058696A2012-03-22
JP2009198881A2009-09-03
JP2017026988A2017-02-02
US20030002117A12003-01-02
US20200403705A12020-12-24
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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