Experimental study of optical frequency comb generation in gain-switched semiconductor lasers

Rosado, Alejandro; Pérez-Serrano, A.; Tijero, J. M. G.; Valle, A.; Pesquera, L.; Esquivias, I.

doi:10.1016/j.optlastec.2018.07.038

Cited by 49 publications

(55 citation statements)

References 43 publications

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“…5 shows the experimental and the simulated optical spectra at I bias = 34 mA, f R = 5 GHz, and two values of V RF . As we already showed in [15], for the lower V RF , a high quality OFC is experimentally observed ( Fig. 5 (a)) with a high CNR = 39 dB and a broad ∆f 10 = 60 GHz, while when the applied voltage is increased ( Fig.…”

Section: Resultssupporting

confidence: 75%

“…The temporal and spectral response of the laser in GS operation was extensively characterized with and without OI for different values of f R , I bias , V RF , P inj and δν. The quality of the OFCs was characterized by means of the 10 dB spectral width (∆f 10 ) and the Carrier-to-Noise Ratio (CNR), as they are defined in [15]. The results of this characterization were compared with the simulations.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, external optical injection (OI) of the gain-switched lasers has been demonstrated to improve the spectral characteristics of the combs. The experimental evidences of a dramatic increase of the carrier to noise ratio, as well as, a decrease of the linewidth of each tone have been attributed to the reduction of the pulse-to-pulse phase noise, the time jitter and the relative intensity noise (RIN) [9]- [11], [13]- [15]. Likewise, the maximum attainable frequency spacing of the combs has been demonstrated to increase under strong injection [16].…”

Section: Introductionmentioning

confidence: 95%

“…In this paper, we complement our previous work [15] in two ways: from an experimental point of view by completing an exhaustive characterization of the optical spectra of the OFCs generated under a wide range of driving and optical injection conditions; and from a theoretical point of view by building a numerical simulator based on a three rate equation model. Special care has been taken in the treatment of the stochastic noise terms [19].…”

Section: Introductionmentioning

confidence: 98%

“…We have recently published an experimental analysis of the effects on the OFC spectral characteristics of the switching and optical injection conditions in a limited range of such conditions, [15]. The analysis showed some of the trends in the evolution of the OFC characteristics and identified some conditions for abrupt transitions between high quality coherent combs and broad incoherent spectra.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical and Experimental Analysis of Optical Frequency Comb Generation in Gain-Switched Semiconductor Lasers

Rosado

Pérez-Serrano

Tijero

et al. 2019

IEEE J. Quantum Electron.

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A numerical model has been implemented and used for the simulation of the optical frequency combs generated by gain-switching single mode laser diodes, either free-running or subjected to optical injection. The dynamical model consists of three rate-equations including stochastic noise terms. An exhaustive comparison between the simulated and the experimental temporal profiles and optical spectra, generated in a wide range of switching and optical injection conditions has been performed. The range of the explored conditions leads to a variety of scenarios including actual combs and broad incoherent spectra, and frequencies in the range of, and well below, the relaxation oscillation frequencies. The detailed maps generated provide guidelines for selecting suitable operation conditions for specific comb characteristics. The excellent quantitative agreement found in the entire range of the explored operation conditions supports the validity of the model for the analysis of the comb generation mechanisms. The model has been used for ascertaining the role of the frequency chirp in the evolution of the comb spectra and discussing the physics underlying the effects of the optical injection.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%