Redding Brandon, McKinney Jason D, Schermer Ross T, Murray Joseph B
Opt Express. 2022 Jun 6;30(12):22097-22106. doi: 10.1364/OE.457796.
We introduce a technique to manipulate an optical frequency comb on a line-by-line basis using stimulated Brillouin scattering (SBS). The narrow-linewidth SBS process has been used to address individual lines in optical frequency combs, but previous demonstrations required a dedicated laser to modulate each comb tooth, prohibiting complete comb control. Here, we use a pair of frequency shifting fiber optic loops to generate both an optical frequency comb and a train of frequency-locked pulses that can be used to manipulate the comb via SBS. This approach enables control of the entire frequency comb using a single seed laser without active frequency locking. To demonstrate the versatility of this technique, we generate and manipulate a comb consisting of 50 lines with 200 MHz spacing. By using polarization pulling assisted SBS, we achieve a modulation depth of 30 dB. This represents a scalable approach to control large numbers of comb teeth with high resolution using standard fiber-optic components.
我们介绍了一种利用受激布里渊散射（SBS）逐行操纵光学频率梳的技术。窄线宽SBS过程已被用于处理光学频率梳中的各个谱线，但先前的演示需要专用激光器来调制每个梳齿，这使得无法实现对整个频率梳的完全控制。在此，我们使用一对移频光纤环来生成光学频率梳和一列频率锁定脉冲，这些脉冲可用于通过SBS操纵频率梳。这种方法能够使用单个种子激光器在无需主动频率锁定的情况下控制整个频率梳。为了证明该技术的通用性，我们生成并操纵了一个由50条谱线组成、间隔为200 MHz的频率梳。通过使用偏振牵引辅助SBS，我们实现了30 dB的调制深度。这代表了一种使用标准光纤组件以高分辨率控制大量梳齿的可扩展方法。
