logo_upc2.jpg  Nonlinear dynamics of semiconductor lasers

 

 

Semiconductor lasers (or laser diodes) are important practical devices, widely used in optical communications, optical signal processing, and life science applications (imaging, sensors, etc.). While “solitary” diode lasers emit a stable output, under external perturbations these lasers display a wide range of dynamical behaviors that can be exploited for applications.

 

The research in our lab is focused in the influence of optical feedback and/or optical injection. We study the regime of low-frequency fluctuations, in which the laser intensity exhibits abrupt and apparently random dropouts that resemble neuronal spikes (see Fig.). We refer to these dropouts as optical spikes.

 

We are interested in exploring the similarity of optical spikes and the spikes of biological neurons. Establishing a connection between these different dynamical systems can offer new perspectives in both, photonics and neuroscience. Laser-based photonic neurons can provide a novel, inexpensive and controllable experimental set up for improving our understanding of neuronal activity. On the other hand, laser-based photonic neurons can be the building blocks of neuro-inspired, ultra-fast optical computing devices.

 

We are also interested in extreme optical pulses (known as optical rogue waves) induced by optical feedback or injection. Our work is aimed at understanding the mechanisms that trigger them and finding ways to control and predict them.

 

Another research topic is the possibility of using optical chaos (generated by optical feedback or injection) for the development of an incoherent light source specifically designed for reducing or mitigating speckle in retina double-pass imaging instruments.

 

Recent publications:

 

Quantitative identification of dynamical transitions in a semiconductor laser with optical feedback

C. Quintero-Quiroz, J. Tiana-Alsina, J. Roma, M. C. Torrent, and C. Masoller, Sci. Rep. 6, 37510 (2016). Supplementary information Video

 

The effects of periodic forcing on the temporally correlated spikes of a semiconductor laser with feedback

T. Sorrentino, C. Quintero-Quiroz, A. Aragoneses, M. C. Torrent and C. Masoller, Optics Express 23, 5571 (2015).

 

PhD Thesis:

 

C. Alberto Quintero Quiroz: Temporal correlations and dynamical transitions in semiconductor lasers with optical feedback (March 2017, Supervisors: C. Masoller and M. C. Torrent).

 

Andres Aragoneses: Experimental study of feedback-induced dynamics in semiconductor lasers: from symbolic analysis to subwavelength position sensing (June 2014, Supervisors: M. C. Torrent and C. Masoller). Video

 

 

Funding:

 

ITN BEOPTICAL (H2020-675512)

 

ITN NETT (FP7 289146)

 

Complex physical and biophysical systems (ComPhysBio, FIS2015-66503-C3-2-P)

 

ICREA ACADEMIA

 

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http://www.fisica.edu.uy/%7Ecris/lasers2_archivos/image010.jpg

Experimental intensity of a semiconductor laser operating in the low-frequency fluctuations regime induced by external optical feedback.

 

Awards:

C. Masoller was elected Fellow of the Optical Society (OSA) “For contributions in the area of nonlinear dynamics of optical systems”. Read more: OSA Fellows 2016

 

http://www.fisica.edu.uy/%7Ecris/osa_award_archivos/image002.jpg 

C. Masoller with A. Wilner (OSA 2016 President), in Rochester

 

Our research in the media:

 

  

C. Masoller, M. C. Torrent, A. Aragoneses and T. Sorrentino, in the lab.

 

Our article in Scientific Reports (2013) was featured in the printed edition of Terrassa newspaper (June and July 2013) and in the digital edition of the national newspaper El Periodico. The first author, Andres Aragoneses, was interviewed by the radio and TV Terrassa.

 

Our article in Scientific Reports (2014) was featured in the printed edition of Terrassa newspaper (September 2014) and in the digital edition of Investigacion y Ciencia. The first author, Andres Aragoneses, was interviewed by TV Terrassa.

 

Other videos: http://www.terrassadigital.cat/detall_actualitat/?id=23128&key=e3ecc548eaa1463c25807dfc1d2259e6#.VCqxWxaPvKd
https://www.youtube.com/watch?v=8BY4SkGkbYk
https://tv.upc.edu/continguts/neurones-optiques

 

 

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