RT Journal Article
T1 Large-signal modulation in distributed feedback quantum cascade lasers for coherent multiharmonic signal generation
A1 Jerez González, Borja
A1 Szedlak, Rolf
A1 Martín Mateos, Pedro
A1 Dios Fernández, Cristina de
A1 Acedo Gallardo, Pablo
A1 Strasser, Gottfied
AB In this Letter, an experimental analysis for coherent multiharmonic signal generation in quantum cascade lasers is presented. The underlying principle relies on the direct modulation of the laser with a large sinusoidal wave to drive the laser above and below threshold. This generates a multiharmonic optical signal in the frequency domain as the device is forced to respond in a nonlinear fashion. The impact of the modulation parameters is assessed in the resultant optical spectrum of a continuous-wave distributed feedback quantum cascade laser. Despite not creating pulses due to the ultrafast dynamics of the laser, the results reveal that a comb structure with uniform line spacing and high phase correlation between teeth can be straightforwardly generated.
PB Springer Science+Business Media, LLC
SN 0306-8919
SN 1572-817X (online)
YR 2018
FD 2018-09-07
LK https://hdl.handle.net/10016/31440
UL https://hdl.handle.net/10016/31440
LA eng
NO B.J., P.M.-M., C.D. and P.A. would like to thank the Spanish Ministry of Economy, Industry and Competitiveness for supporting the project under the TEC2017-86271-R Grant. R.S. and G.S. acknowledge the support by the Austrian Science Fund (FWF) Project #49 (Next-Lite). The work by B.J. has been performed in the frame of an FPU Program, #FPU014/06338 and a Mobility Aids for Short Stays and Temporal Transfers Program, #EST16/00172, both granted by the Spanish Ministry of Education, Culture and Sports
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RD 1 sept. 2024