Optical frequency comb generation via pulsed gain-switching in externally-injected semiconductor lasers using step-recovery diodes

Rosado, Alejandro; Martin, Eamonn P.; Pérez-Serrano, A.; Tijero, J. M. G.; Esquivias, I.; Anandarajah, Prince M.

doi:10.1016/j.optlastec.2020.106392

Cited by 19 publications

(8 citation statements)

References 18 publications

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“…On the other hand, increasing the frequency resolution while keeping a high measurement speed could be accomplished by using two combs with dissimilar line spacing [48]. The use of step recovery diodes to generate the electrical pulses [18] and a simpler digitizer for the acquisition of the interferograms, would reduce the complexity and cost of the electronics. Moreover, the integration of the optical part in a photonic circuit would make the solution more cost-efficient and would significantly reduce the footprint of the system.…”

Section: Resultsmentioning

confidence: 99%

“…In that work, we reported on the generation of flat low-noise combs in the C-band with an optical bandwidth of 85 GHz and a line spacing of 100 MHz. That optical bandwidth has been subsequently broadened to 90 GHz and 112 GHz when the pulsed GS is driven by a low-cost step recovery diode and a pulse pattern generator (PPG), respectively [18]. These results point out the potential of OFCs based on GS with pulsed excitation to perform DCS with high frequency sampling.…”

Section: Introductionmentioning

confidence: 86%

“…In parallel to the search for innovative applications, many efforts have been devoted to develop alternatives to mode-locked OFCs, with the aim of providing tunable, cost-efficient and field-deployable comb generators [9][10][11]. Among these comb platforms, OFCs generated from semiconductor lasers by gain-switching (GS) have attracted considerable attention in recent years [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Besides benefiting from the usual advantages of semiconductor sources (high efficiency, low cost and small footprint), the comb generation by GS also offers low losses, flexible comb line spacing and, outstandingly, suitability for photonic integration [20].…”

Section: Introductionmentioning

confidence: 99%

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Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

et al. 2020

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In this work we demonstrate the capability of two gain-switched optically injected semiconductor lasers to perform high-resolution dual-comb spectroscopy. The use of low duty cycle pulse trains to gain switch the lasers, combined with optical injection, allows us to obtain flat-topped optical frequency combs with 350 optical lines (within 10 dB) spaced by 100 MHz. These frequency combs significantly improve the spectral resolution reported so far on dual-comb spectroscopy with gain-switched laser diodes. We evaluate the performance of our system by measuring the transmission profile of an absorption line of H 13 CN at the C-band, analyzing the attainable signal-to-noise ratio for a range of averaging times.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

et al. 2020

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“…In addition, these systems should be based on lowcost electronics for generating the different required signals without compromising the robustness, resolution, and accuracy of the system. In this direction, the viability of using step-recovery diodes for producing OFCs has been recently demonstrated [18]. To complete the entire picture, on the detection side, the analysis of the received RF spectrum should be also optimized in terms of cost.…”

Section: Rf Frequency Pd Voltagementioning

confidence: 99%

Dual-Comb Spectrometer Based on Gain-Switched Semiconductor Lasers and a Low-Cost Software-Defined Radio

et al. 2021

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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 H 13 C 14 N 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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“…The bandwidth of OFC is about 77.0 GHz. Here, the bandwidth is defined as the continuous frequency range within which the amplitude variation between the highest comb line and other comb lines is below 10 dB22 . The results indicate that the noise spectrum of gain-switching can be improved obviously by introducing appropriate optical injection, redistribution of energy among comb lines together with the bandwidth enhancement effect makes the OFC generated by the current modulated have broader bandwidth23 .…”

mentioning

confidence: 99%

Generation of tunable and broadband optical frequency comb based on gain-switching vertical-cavity surface-emitting laser driven by square wave signal under optical injection

Gou

Zhang

Luo

et al. 2022

Semiconductor Lasers and Applications XII

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We have experimentally investigated the generation of tunable and broadband Optical Frequency Comb (OFC) based on a gain-switching vertical-cavity surface emitting laser driven by a square wave signal under optical injection. During the experiment, the influences of modulation frequency fm and injection light wavelength λi on OFC performances are analyzed systematically. The experimental results indicate that under suitable operation parameters, an OFC with bandwidth of 77.0 GHz within 10 dB power variation and single sideband phase noise of -115.7 dBc/Hz @ 10 kHz can be generated. Also, during the modulation frequency range of 1.5 GHz - 2.8 GHz, broadband OFCs with bandwidth exceeding 70.0 GHz can be obtained based on the square-current modulated VCSEL under optical injection.

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Optical frequency comb generation via pulsed gain-switching in externally-injected semiconductor lasers using step-recovery diodes

Cited by 19 publications

References 18 publications

Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

Dual-Comb Spectrometer Based on Gain-Switched Semiconductor Lasers and a Low-Cost Software-Defined Radio

Generation of tunable and broadband optical frequency comb based on gain-switching vertical-cavity surface-emitting laser driven by square wave signal under optical injection

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