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Combining all the benefits of Fourier transform infrared (FTIR) spectroscopy in a chip scale spectroscopic sensor looks promising for mobile and wearable platform development. Dual-comb spectroscopy enables downconversion of optical absorption spectra into the RF range for fast measurement using single photodetector [1] . Some cases of dual-comb spectroscopy based on laser-pumped MRs were successfully demonstrated [2] – [4] . The early attempts at combining LD-pumped integrated frequency combs into dual-comb were also reported [5] . However, to demonstrate viability of the technology for applications, it is important to integrate LD and SiN-chip with the MR into the compact autonomously operated device generating at least one optical frequency comb.
Sylvie Roke, Saranya Pullanchery Sankara Narayanan, Lei Zhang, Sergey Kulik
Camille Sophie Brès, Jianqi Hu, Ivan Cardea