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Chin. Opt. Lett.
 Home  List of Issues    Issue 09 , Vol. 15 , 2017    10.3788/COL201715.090603

Frequency-doubled triangular shape lightwave generation with a flexible modulation index
Jing Li1;2, Ze Hao1;2, Li Pei1;2, Tigang Ning1;2, and Jingjing Zheng1;2
1 Key Lab of All Optical Network &
Advanced Telecommunication Network of EMC, [Beijing Jiaotong University], Beijing 1 00044, China
2 Institute of Lightwave Technology, [Beijing Jiaotong University], Beijing 100044, China

Chin. Opt. Lett., 2017, 15(09): pp.090603

Topic:Fiber optics and optical communication
Keywords(OCIS Code): 060.1155  060.5625  060.4080  

An approach for full duty frequency-doubled triangle shape lightwave generation is proposed and demonstrated. It requires a dual-parallel Mach–Zehnder modulator (DP-MZM) driven by a sinusoidal signal. A stop band filter is coupled to filter out two undesired sidebands. By tuning the bias voltage applied to the DP-MZM, the output optical intensity with a full duty cycle triangle shape profile can be obtained. It is found that the required modulation index is no longer a fixed one. It can vary within a range, without degrading the target waveform. The principle is analyzed by theory and evaluated by simulation. A proof-of-concept experiment is also conducted. Good agreements between theoretical prediction and experimental results have been found. This approach might be attractive due to the feature of a variable modulation index, which insures simple operation in practice.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Posted online:2017/7/3

Get Citation: Jing Li, Ze Hao, Li Pei, Tigang Ning, and Jingjing Zheng, "Frequency-doubled triangular shape lightwave generation with a flexible modulation index," Chin. Opt. Lett. 15(09), 090603(2017)

Note: This work was supported in part by the National Natural Science Foundation of China under Grant No. 61405007.


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