Optical Sinc-Shaped Nyquist Pulses Generation From Frequency-Quadrupled Rectangular Frequency Comb

被引：3

作者：

Chen, Hongyao ^{[1
]}

Ning, Tigang ^{[1
]}

Li, Jing ^{[1
]}

Pei, Li ^{[1
]}

Zheng, Jingjing ^{[1
]}

Liu, Ling ^{[1
]}

Yuan, Jin ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Inst Lightwave Technol, Key Lab All Opt Network & Adv Telecommun Network, Beijing 100044, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2017年 / 9卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Fiber optics and optical communications; modulation; pulses; TDM TRANSMISSION;

D O I：

10.1109/JPHOT.2017.2761814

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Frequency-quadrupled rectangular optical frequency comb (OFC) generation with Nyquist temporal waveforms using a dual-parallel Mach-Zehnder modulator (DP-MZM) and a remodulation structure is proposed. The remodulation structure is formed by a coupler, a photodiode, and an intensity modulator. Its function is similar to optical carrier suppression (OCS) modulation index amplifier, which can achieve the modulation index improve of approximately 77.9% in the OCS modulation. This result in no special modulation index is needed in the proposed scheme. By using a 4 GHz sinusoid signal, a 4-tones frequency-quadrupled OFC with sideband spacing of 16 GHz and flatness within 0.5 dB is experimentally generated. The temporal waveform is sinc-shaped Nyquist pulse with duty cycle 23% and the repetition rate is quadrupling that of the local oscillator frequency, which shows great potential in generating a cost-effective pulses. Moreover, being benefited from the filter-free structure, the high flexibility of the generated Nyquist pulse has also been demonstrated.

引用

页数：7