Optimization of a frequency comb-based calibration of a tunable laser

Ramzil R. Galiev; Nikita M. Kondratiev; Valery E. Lobanov; Igor A. Bilenko

doi:10.1117/12.2574592

16 October 2020 Optimization of a frequency comb-based calibration of a tunable laser

Ramzil R. Galiev, Nikita M. Kondratiev, Valery E. Lobanov, Igor A. Bilenko

Proceedings Volume 11552, Optical Metrology and Inspection for Industrial Applications VII; 115521J (2020) https://doi.org/10.1117/12.2574592
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

We analyze in detail a scheme of the comb-calibrated frequency-modulated continuous-wave (FMCW) laser and study the accuracy of the laser frequency measurements. In this scheme the moment when the tunable laser frequency crosses the reference comb lines is obtained by filtering the heterodyne signal between the frequency comb and the tunable laser with a narrow band-pass filter. We show that the accuracy of the measured instantaneous frequency depends on the frequency sweep speed, bandwidth filter parameters and total phase noise of the laser and applied frequency comb. In this work we present the optimal ratio of frequency sweep and filter bandwidth for the given total phase noise and type of narrowband filter providing the highest frequency calibration accuracy.

Conference Presentation

Citation Download Citation

Ramzil R. Galiev, Nikita M. Kondratiev, Valery E. Lobanov, and Igor A. Bilenko "Optimization of a frequency comb-based calibration of a tunable laser", Proc. SPIE 11552, Optical Metrology and Inspection for Industrial Applications VII, 115521J (16 October 2020); https://doi.org/10.1117/12.2574592

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