发明名称 |
Suppression of cladding mode loss in fiber amplifiers with distributed suppression of amplified spontaneous emission (ASE) |
摘要 |
A fiber amplifier in which the active core is surrounded by a cladding and coupling of radiation between a core mode and cladding modes is suppressed to minimize cladding mode losses in a short wavelength range. An index profile is established in the active core and in the cladding such that the core exhibits a loss above a cutoff wavelength lambda<SUB>c </SUB>and positive gains in the short wavelength range below the cutoff wavelength lambda<SUB>c</SUB>. Suppression of cladding mode losses is achieved by an arrangement for suppressing the coupling of radiation in the short wavelength range between a core mode supported the active core and a cladding mode supported by the cladding. The arrangement for suppressing can include an absorbing material or a scattering material distributed in the cladding. The arrangement for suppressing can include a non-phase-matched length section of the fiber amplifier in which the core mode and the cladding modes are not phase matched.
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申请公布号 |
US6970631(B2) |
申请公布日期 |
2005.11.29 |
申请号 |
US20020163557 |
申请日期 |
2002.06.05 |
申请人 |
LIGHTWAVE ELECTRONICS |
发明人 |
ARBORE MARK A. |
分类号 |
H01S3/067;H01S3/08;H01S3/16;(IPC1-7):G02B6/16 |
主分类号 |
H01S3/067 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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