Invention Application
- Patent Title: OPTICAL AMPLIFIER
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Application No.: US17760697Application Date: 2019-09-26
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Publication No.: US20220337016A1Publication Date: 2022-10-20
- Inventor: Shinichi AOZASA , Taiji SAKAMOTO , Kazuhide NAKAJIMA , Masaki WADA
- Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Current Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Current Assignee Address: JP Tokyo
- International Application: PCT/JP2019/037907 WO 20190926
- Main IPC: H01S3/067
- IPC: H01S3/067

Abstract:
An objective is to provide an optical amplifier having a core excitation configuration that improves amplification efficiency. An optical amplifier according to the present invention includes an excitation light conversion fiber 11 that absorbs first excitation light L1 propagating in a cladding and having a first wavelength and emits, into a core, spontaneous emission light having a second wavelength, an oscillator 12 for causing the spontaneous emission light to be reflected on two reflectors 15 to reciprocate the light within the core of the excitation light conversion fiber 11 and laser-oscillating second excitation light L2 having the second wavelength, and an amplification fiber 13 that is connected to the excitation light conversion fiber 11 and amplifies signal light with the second excitation light L2 supplied from the excitation light conversion fiber 11 to the core.
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