Near-infrared InGaAs/InP distributed-feedback lasers for spectroscopic applications

Ramon U. Martinelli; Raymond J. Menna; David E. Cooper; Clinton B. Carlisle; Haris Riris

doi:10.1117/12.176626

1 June 1994 Near-infrared InGaAs/InP distributed-feedback lasers for spectroscopic applications

Ramon U. Martinelli, Raymond J. Menna, David E. Cooper, Clinton B. Carlisle, Haris Riris

Proceedings Volume 2148, Laser Diode Technology and Applications VI; (1994) https://doi.org/10.1117/12.176626
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Near-infrared diode-laser-based systems using laser-absorption molecular spectroscopy can sensitively monitor atmospheric gases, pollutants, and toxic gases. They can also monitor trace gases on the human breath for medical diagnostics. The detection levels are equal to or less than parts per million. Sarnoff/SRI has made and tested room-temperature InGaAsP/InP DFB lasers operating at 1.39, 1.6, and 1.65 micrometers . All of these devices had output powers of 10 mW or more. The current-tuning rates varied from -580 to -1240 MHz/mA. The temperature tuning rate was about 0.1 nm/K for all devices. Continuous tuning ranges were 7 nm for the 1.39 micrometers lasers and 5 nm for the 1.6 and 1.65 micrometers lasers. We observed H₂O at 1.39 micrometers , CO and CO₂ at 1.6 micrometers , and CH₄ at 1.65 micrometers . We monitored the ratio of ¹³CO₂ to ¹²CO₂ on human breath samples as the initial step towards clinical trials for medical diagnostics.

Citation Download Citation

Ramon U. Martinelli, Raymond J. Menna, David E. Cooper, Clinton B. Carlisle, and Haris Riris "Near-infrared InGaAs/InP distributed-feedback lasers for spectroscopic applications", Proc. SPIE 2148, Laser Diode Technology and Applications VI, (1 June 1994); https://doi.org/10.1117/12.176626

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