Analysis of performance of RFS-based optical comb influenced by linewidth of laser source

• 作 者: 李建蕊 席丽霞 唐先锋 林嘉川 张霞 成虹桥 张晓光
• 机 构: State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts
• 出 处: Chinese Optics Letters
• 发表日期: 2014年02期
• 关键词: flatness crosstalk choice modulator EDFA multiplexing have coherent listed moret

The laser source is an important element whose properties have influence on the output performance of single sideband(SSB) optical comb based on recirculating frequency shifter(RFS).The theoretical and experimental results show that the tone-to-noise ratio(TNR),flatness,and stability of optical comb improve using laser source with narrower linewidth.In order to obtain the optical comb with TNR larger than 42 dB and degree of stability(DOS) smaller than-6.7 dB,external cavity laser(ECL) with linewidth from 100 kHz to 1 MHz is a trade-off choice.

The laser source is an important element whose properties have influence on the output performance of single sideband (SSB) optical comb based on recirculating frequency shifter (RFS). The theoretical and experimental results show that the tone-to-noise ratio (TNR), flatness, and stability of optical comb improve using laser source with narrower linewidth. order to obtain the optical comb with TNR larger than 42 dB and degree of stability (DOS) smaller than-6.7 dB, external cavity laser (ECL) with linewidth from 100 kHz to 1 MHz is a trade-off choice.