Fourier analysis of optical spectra for characterization of regimes in passively mode-locked fiber lasers

H. Santiago-Hernández; D. I. Serrano Garcia; O. Pottiez; B. Ibarra-Escamilla; J. Flores Nuñez; G. García-Torales; M. Durán-Sánchez; G. Parra-Escamilla; A. Mora-Núñez; M. S. B. Bravo Medina

doi:10.1117/12.2568205

20 August 2020 Fourier analysis of optical spectra for characterization of regimes in passively mode-locked fiber lasers

H. Santiago-Hernández, D. I. Serrano Garcia, O. Pottiez, B. Ibarra-Escamilla, J. Flores Nuñez, G. García-Torales, M. Durán-Sánchez, G. Parra-Escamilla, A. Mora-Núñez, M. S. B. Bravo Medina

Author Affiliations +

Proceedings Volume 11502, Infrared Remote Sensing and Instrumentation XXVIII; 115020R (2020) https://doi.org/10.1117/12.2568205
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Conference Poster

Abstract

We propose to use the fast Fourier transformation (FFT) to analyze the spectral data of passively mode-locked fiber lasers, with the purpose of characterizing and classifying the different pulsed regimes arising in these lasers. The results show temporal information at the sub-ps scale. Specially, in the Fourier domain, the spectra of bound solitons depict several solitons with relative phases of π/2 and close to 0, distributed into a window that extends beyond the limited span of the autocorrelator. Besides, the FFT amplitude traces can help to classify the multi-pulse regimes generated by the laser; in particular, the exponential decay of intensity in such amplitude traces can be a fingerprint of noise-like pulses. Furthermore, the amplitude traces show some modulation that we attribute to Kelly’s sidebands. The proposed technique allows examining spectra from a mode-locked fiber laser independently of the active medium or laser cavity configuration without the need to use ultrafast photo- detectors.

Conference Presentation

Citation Download Citation

H. Santiago-Hernández, D. I. Serrano Garcia, O. Pottiez, B. Ibarra-Escamilla, J. Flores Nuñez, G. García-Torales, M. Durán-Sánchez, G. Parra-Escamilla, A. Mora-Núñez, and M. S. B. Bravo Medina "Fourier analysis of optical spectra for characterization of regimes in passively mode-locked fiber lasers", Proc. SPIE 11502, Infrared Remote Sensing and Instrumentation XXVIII, 115020R (20 August 2020); https://doi.org/10.1117/12.2568205

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