论文标题
宽带超高分辨率扫描扫描扫描扫描式双弯曲光谱
Broadband Ultrahigh-Resolution chip-scale Scanning Soliton Dual-Comb Spectroscopy
论文作者
论文摘要
我们提出了用于宽带超高分辨率采集的芯片尺度扫描双弯曲光谱（SDC）方法。 SDC使用SI3N4微孔谐振器，从单个1550 nm激光器的同一芯片上生成两个跨越37 THz（300 nm）的单孤子微型剂量，形成了高弹性双重双弯曲。我们使用基于集成的微热器的波长跟踪器，在整个37.5 THz的整个光学跨度中连续调整双弯曲系统。通过同时调整激光频率和两个单个孤子微型振体，在Microrings的完整游离光谱范围内同时调整激光频率和两个单型孤子微型弹药，从而实现了这种连续的波长调谐。我们测量SDCS分辨率为319+-4.6 kHz。使用此SDCS系统，我们在其2.3 THz（18 nm）范围内的泛音带上执行了H13C14N的分子吸收光谱，并表明双弯曲提供的大量平行异质范围扩大了有效的光谱调谐速度，该速度有效地通过一阶通过一阶激光。我们的芯片尺度SDC为宽带光谱法打开了大门，并通过超高光谱分辨率进行了大规模平行感测。
We present a chip-scale scanning dual-comb spectroscopy (SDCS) approach for broadband ultrahigh-resolution spectral acquisition. SDCS uses Si3N4 microring resonators that generate two single soliton micro-combs spanning 37 THz (300 nm) on the same chip from a single 1550-nm laser, forming a high-mutual-coherence dual-comb. We realize continuous tuning of the dual-comb system over the entire optical span of 37.5 THz with high precision using integrated microheater-based wavelength trackers. This continuous wavelength tuning is enabled by simultaneous tuning of the laser frequency and the two single soliton micro-combs over a full free spectral range of the microrings. We measure the SDCS resolution to be 319+-4.6 kHz. Using this SDCS system, we perform the molecular absorption spectroscopy of H13C14N over its 2.3 THz (18 nm)-wide overtone band, and show that the massively parallel heterodyning offered by the dual-comb expands the effective spectroscopic tuning speed of the laser by one order of magnitude. Our chip-scale SDCS opens the door to broadband spectrometry and massively parallel sensing with ultrahigh spectral resolution.
