Generation of multi-carrier based on a recirculating frequency shifter with delay interferometer

Recirculating frequency shifter （RFS） can generate stable multi-carder, but the carder-to-noise-ratio （CNR） is limited because noise is accumulated round by round in the recirculation loop structure. A modified RFS with a delay inter- ferometer （DI） is proposed in this paper. The DI can suppress the...

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Bibliographic Details
Published in:Optoelectronics letters 2013-11, Vol.9 (6), p.418-420
Main Author: 成虹桥 席丽霞 林嘉川 张晓光 张霞 李建蕊
Format: Article
Language:English
Subjects:
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
RFS
基础
多载波
干涉仪
延迟
循环回路
抑制噪声
频移
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Summary:Recirculating frequency shifter （RFS） can generate stable multi-carder, but the carder-to-noise-ratio （CNR） is limited because noise is accumulated round by round in the recirculation loop structure. A modified RFS with a delay inter- ferometer （DI） is proposed in this paper. The DI can suppress the accumulated noise, and enhance the CNR of multi-carrier. The principle of the generation of high quality multi-carrier based on an RFS with DI is analyzed theoretically. 50 stable carriers with spacing of 10.7 GHz are successfully generated. The flatness of 50 stable carriers is 3 dB, and the CNR is 43 dB which is increased by 3 dB compared with the structure without DI.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-013-3124-1