We report a method of precise chemical sensing by using on-chip external cavity lasing technology, in which a photonic micro-disk resonator acting as a sensing element is embedded into a laser’s external cavity. The bandwidth of resonance peak of the passive resonator is greatly reduced. The lasing technology improves the quality factor of the system and the detection limitation in chemical sensing by 1-order of magnitude comparing with conventional passive devices.

中文翻译：

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通过外腔激光技术实现精确的化学传感

我们报告了一种通过使用片上外腔激光技术进行精确化学传感的方法，其中将充当传感元件的光子微盘谐振器嵌入到激光器的外腔中。无源谐振器的谐振峰带宽大大降低。与传统无源器件相比，激光技术将系统的品质因数和化学传感中的检测限制提高了 1 个数量级。