光学
四波混频
频率梳
材料科学
平坦度(宇宙学)
色散位移光纤
光纤
光放大器
保偏光纤
非线性光学
物理
激光器
光纤传感器
宇宙学
量子力学
作者
Vishal Sharma,Surinder Singh,Lovkesh,Elena A. Anashkina,Alexey V. Andrianov
出处
期刊:Optik
[Elsevier]
日期:2021-09-01
卷期号:241: 166948-166948
被引量:10
标识
DOI:10.1016/j.ijleo.2021.166948
摘要
We demonstrate a broad and flat optical frequency comb (OFC) by exploiting the four-wave mixing experienced by optical signals propagating through the highly nonlinear fiber. We modulate two 50 GHz spaced continuous wave laser signals using single mach-zehnder modulator controlled by 25 GHz periodic radiofrequency signal which results in a broad but non flat and non-coherent OFC. 400 m long highly nonlinear fiber (HNLF) is used to initialize the four wave mixing and induce the coherency between the OFC frequency lines. The flatness and broadness of optical frequency comb further enhanced by passing it through a 500 m long fiber. By managing a highly nonlinear fiber length compared to the coherence length, nonlinear coefficient, and injected optical power inside two-stage cascaded erbium-doped fiber amplifier (EDFA) and HNLF, an optical frequency comb of 55 frequency lines with 3 dB maximum power deviation is realized.
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