中国激光, 2012, 39 (12): 1205006, 网络出版: 2012-11-06
基于光频梳的超短光脉冲的产生及其在光模数转换中的应用
Ultra-Short Optical Pulse Generation Based on Optical Frequency Comb and Application in Optical Analog-to-Digital Conversion
超快光学 信号处理 光脉冲 光频梳 相位调制 光模数转换 ultrafast optics signal processing optical pulse optical frequency comb phase modulation optical analog-to-digital conversion
摘要
提出并实验验证了一种基于光频梳的超短光脉冲的产生方法。使用强度调制器和相位调制器级联直接调制直流激光得到了29条顶部功率变化小于1.5 dB的光频梳。利用单模光纤色散将光频梳整形成重复频率为10 GHz,脉宽为2.68 ps 的光脉冲。并成功用于对1~4 GHz信号采样,系统的信噪比可达33.83 dB,等效于5.33 bit的有效比特数。
Abstract
A scheme for the generation of ultra-short optical pulse, based on optical frequency comb (OFC), is proposed and demonstrated experimentally. An OFC with 29 comb lines within 1.5 dB spectral power variation is obtained by cascading intensity and phase modulators modulating a continuous wave laser. The OFC is dispersed by a segment of single mode fiber (SMF). Ultra-short optical pulses with 10 GHz repetition rate and 2.68 ps pulse width are demonstrated. The pulses are used for sampling 1~4 GHz radio frequency signals. The signal-to-noise ratio of this scheme is 33.83 dB, equivalent to effective bit number of 5.33 bit.
窦玉杰, 张洪明, 姚敏玉. 基于光频梳的超短光脉冲的产生及其在光模数转换中的应用[J]. 中国激光, 2012, 39(12): 1205006. Dou Yujie, Zhang Hongming, Yao Minyu. Ultra-Short Optical Pulse Generation Based on Optical Frequency Comb and Application in Optical Analog-to-Digital Conversion[J]. Chinese Journal of Lasers, 2012, 39(12): 1205006.