Monolithic wide tunable laser diodes for gas sensing at 2100 nm

Nicolas Koslowski; Andreas Heger; Karl Roessner; Michael Legge; Johannes Koeth; Lars Hildebrandt

doi:10.1117/12.2004020

4 March 2013 Monolithic wide tunable laser diodes for gas sensing at 2100 nm

Nicolas Koslowski, Andreas Heger, Karl Roessner, Michael Legge, Johannes Koeth, Lars Hildebrandt

Proceedings Volume 8640, Novel In-Plane Semiconductor Lasers XII; 864008 (2013) https://doi.org/10.1117/12.2004020
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

Novel monolithic widely tunable laser diodes in the 2.1μm wavelength region based on GaSb / AlGaAsSb are presented. Using the concept of a lateral binary superimposed (BSG) grating structures and multisegment Verniertuning, stable single-mode output is realized at discrete wavelength channels in the 2060 nm – 2140 nm region. A total tuning above 80 nm in six channels is demonstrated. In every wavelength channel, the output wavelength can be tuned by current and temperature. Each wavelength channel offers up to 6 nm of mode hop free tuning, making this novel widely tunable laser highly attractive as a monolithic light source for multiple-gas sensing or liquid detection purposes. The wavelength channels can be arbitrarily placed within the material gain allowing BSG lasers to sweep e.g. over several gas absorption line within 80 nm. Within a wavelength channel, the widely tunable lasers show DFB like spectral performance with average side-mode suppression-ratios above 40 dB, output power of up to 15 mW at 25°C. Also temperature and current tuning coefficients are comparable to those of DFB lasers. This paper will present an overview of laser concept, performance data and applications.

Citation Download Citation

Nicolas Koslowski, Andreas Heger, Karl Roessner, Michael Legge, Johannes Koeth, and Lars Hildebrandt "Monolithic wide tunable laser diodes for gas sensing at 2100 nm", Proc. SPIE 8640, Novel In-Plane Semiconductor Lasers XII, 864008 (4 March 2013); https://doi.org/10.1117/12.2004020

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KEYWORDS

Absorption

Tunable lasers

Semiconductor lasers

Diodes

Refractive index

Laser applications

Binary data

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