期刊
IEEE ACCESS
卷 9, 期 -, 页码 92367-92373出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3091872
关键词
Semiconductor lasers; Radio frequency; Optical receivers; Optical pulses; Gas lasers; Spectroscopy; Measurement by laser beam; Dual-comb spectroscopy; optical frequency comb; semiconductor lasers; software defined radio
资金
- Ministerio de Economia y Competitividad of Spain, LIDERA [RTI2018-094118-B-C21]
- Universidad Politecnica de Madrid/Comunidad de Madrid, MULTI-GAS-PIC [APOYO-JOVENES-KXHJ8C-16-VCKM78]
- Comunidad de Madrid
- FEDER Program [P2018/NMT-4326]
Dual-comb spectroscopy is a promising technique with advantages in frequency resolution, accuracy, and acquisition speed. This paper demonstrates the use of a low-cost software defined radio platform as a receiver for accurate signal acquisition in a dual-comb spectrometer.
Dual-comb spectroscopy has become a topic of growing interest in recent years due to the advantages it offers in terms of frequency resolution, accuracy, acquisition speed, and signal-to-noise ratio, with respect to other existing spectroscopic techniques. In addition, its characteristic of mapping the optical frequencies into radio-frequency ranges opens up the possibility of using non-demanding digitizers. In this paper, we show that a low-cost software defined radio platform can be used as a receiver to obtain such signals accurately using a dual-comb spectrometer based on gain-switched semiconductor lasers. We compare its performance with that of a real-time digital oscilloscope, finding similar results for both digitizers. We measure an absorption line of a (HCN)-C-13-N-14 cell and obtain that for an integration time of 1 s, the deviation obtained between the experimental data and the Voigt profile fitted to these data is around 0.97% using the low-cost digitizer while it is around 0.84% when using the high-end digitizer. The use of both technologies, semiconductor lasers and low-cost software defined radio platforms, can pave the way towards the development of cost-efficient dual-comb spectrometers.
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