Temperature modulation of near-infrared distributed feedback diode lasers for gas sensing

Jacobus S. Vermaak; Gregory H. Olsen; E. R. Argueta; E. Mykietyn; Ramon U. Martinelli; Raymond J. Menna; John C. Connolly

doi:10.1117/12.255319

21 October 1996 Temperature modulation of near-infrared distributed feedback diode lasers for gas sensing

Jacobus S. Vermaak, Gregory H. Olsen, E. R. Argueta, E. Mykietyn, Ramon U. Martinelli, Raymond J. Menna, John C. Connolly

Author Affiliations +

Proceedings Volume 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring; (1996) https://doi.org/10.1117/12.255319
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

It is well known that DFB lasers tune by a factor of at least 10 times more with temperature than with current. The problem, however, is that the electrical modulation of the laser is easier and much faster than temperature modulation. This paper describes a novel technique to temperature modulate a DFB laser. A 1393 nm DFB laser chip is mounted directly on a single element thermo-electric cooler (TEC) which allows temperature modulation of the chip by passing a current in both the forward and reverse direction through the TEC. A +/- 40 mA modulation through the TEC at a rate of up to 30 Hz provides a frequency sweep of 46 GHz of the laser output frequency. The time constant of the setup is 10 ms.

Citation Download Citation

Jacobus S. Vermaak, Gregory H. Olsen, E. R. Argueta, E. Mykietyn, Ramon U. Martinelli, Raymond J. Menna, and John C. Connolly "Temperature modulation of near-infrared distributed feedback diode lasers for gas sensing", Proc. SPIE 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring, (21 October 1996); https://doi.org/10.1117/12.255319

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