针对产生光频率梳需要锁模激光种子源的难题, 创新性提出了用连续光源产生光频率梳, 应用色散平坦高非线性光纤解决了宽光谱范围四波混频和级联四波混频效应的相位失配问题。通过实验展示了近40 nm带宽的光频率梳的形成, 光频率梳由低功耗, 低成本, 连续波种子(法布里-珀罗激光器)生成, 无需脉冲激光源。连续光频率梳是由在420 m零色散色散平坦高非线性光纤中的四波混频和级联四波混频效应产生的, 频谱带宽扩展了近10倍, 频率梳的线宽为4.3 MHz。

In order to solve the problem of generating optical frequency comb by mode-locked laser seed source, a new method to generate optical frequency comb by continuous light source was presented and the problem of phase mismatch in four-wave mixing and cascaded four-wave mixing with wide spectral range was solved by using dispersion-flattened highly nonlinear optical fiber. We experimentally demonstrated efficient generation of an equalized optical comb with nearly 40 nm bandwidth. The comb was generated by low-power, low-cost, continuous-wave seeds(FP-LDs) without needing for pulsed laser sources. The CW frequency comb were generated by four-wave mixing(FWM) and cascaded FWM whose bandwidth of the spectrum was expanded by nearly 10 times and the linewidth of the frequency comb was 4.3 MHz with 420 m zero-slope dispersion dispersion-flattened HNLF.