Chinese Optics Letters, 2015, 13 (1): 010605, Published Online: Jan. 6, 2015
Scheme for generation of flat top and high signal-to-noise ratio optical frequency comb 
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060.0060 Fiber optics and optical communications 060.5060 Phase modulation 350.2460 Filters, interference
Abstract
We demonstrate a new scheme for generation of optical frequency comb (OFC) based on cascade modulators, 23 comb lines within 0.5 dB spectral power variation are obtained. An optical finite impulse response (FIR) filter is introduced for suppression of amplified spontaneous emission noise. It is shown that carrier-to-noise-ratio of the OFC generated by this scheme can be as high as 38.8 dB with 12 dB improvement by using a 16-tap FIR filter, and the error vector magnitude performances of loaded Nyquist-16 quadrature amplitude -modulation signal is improved from 14.20% to 7.44%.
Jianrui Li, Jiachuan Lin, Xiaoguang Zhang, Lixia Xi, Xianfeng Tang, Yaojun Qiao. Scheme for generation of flat top and high signal-to-noise ratio optical frequency comb[J]. Chinese Optics Letters, 2015, 13(1): 010605.
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