分类： 光学 >> 量子光学 提交时间： 2023-02-19
Yanhong Guo
Zhaoyu Li
Ning An
Yongzheng Guo
Yuchen Wang
Yusen Yuan
Hao Zhang
Teng Tan
Caihao Wu
Bo Peng
Giancarlo Soavi
Yunjiang Rao
Baicheng Yao
摘要： Optical microcavity enhanced light-matter interaction offers a powerful tool to develop fast and precise sensing techniques, spurring applications in the detection of biochemical targets ranging from cells, nanoparticles, and large molecules. However, the intrinsic inertness of such pristine microresonators limits their spread in new fields such as gas detection. Here, a functionalized microlaser sensor is realized by depositing graphene in an erbium-doped over-modal microsphere. By using a 980 nm pump, multiple laser lines excited in different mode families of the microresonator are co-generated in a single device. The interference between these splitting mode lasers produce beat notes in the electrical domain (0.2-1.1 MHz) with sub-kHz accuracy, thanks to the graphene-induced intracavity backward scattering. This allows for multispecies gas identification from a mixture, and ultrasensitive gas detection down to individual molecule.
分类： 光学 >> 量子光学 提交时间： 2023-02-19
Yong Geng
Yanlan Xiao
Qingsong Bai
Xinjie Han
Wenchan Dong
Wenting Wang
Jinggu Xue
Baicheng Yao
Guangwei Deng
Qiang Zhou
Kun Qiu
Jing Xu
Heng Zhou
摘要： In this Letter, we investigate the feasibility and performance of wavelength division multiplexed (WDM) optical communications using an integrated dissipative Kerr soliton micro-comb as the multi-channel laser source. First, we confirm that soliton microcomb pumped directly by a DFB laser self-injection locked to the host micro-cavity has sufficiently low frequency and amplitude noises to encode advanced data formats. Second, perfect soliton crystals are exploited to boost the power level of each microcomb line, so that they can be directly used for data modulation excluding pre-amplification. Third, in a proof-of-concept experiment we demonstrate 7-channel 16-QAM data transmissions using an integrated perfect soliton microcomb as the laser carriers, excellent data receiving performances are obtained under various fiber link distances and amplifier configurations. Our study reveals that fully integrated Kerr soliton microcombs are viable and advantageous for optical data communications.
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