A 4.26-um RCLED and a fast low-power CO2 sensor

Audrey Nelson; Andrian Kouznetsov

doi:10.1117/12.809293

3 February 2009 A 4.26-μm RCLED and a fast low-power CO₂ sensor

Audrey Nelson, Andrian Kouznetsov

Proceedings Volume 7231, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIII; 72310V (2009) https://doi.org/10.1117/12.809293
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

We have developed 4.26 μm room temperature resonant-cavity light-emitting diodes (RCLED) using III-V material system (InAs, InSb, and GaSb). The emission spectrum of RCLED closely matches the CO2 absorption profile. The wavelength of the peak of the emission spectrum is stable with respect to wide variations in the temperature and the drive current. Consequently we were able to develop a low cost RCLED based CO2 sensor operating over a wide temperature ranges of +5 to + 45 degrees C and minus 20 to + 60 degrees C (depending on the IR detector used) without a TE-cooler. These sensor devices consume very low power, at the level of mW, with a fast response time of 10 sec and better. It can measure CO2 levels in the range 0-10,000ppm with an accuracy of better than +-5%.

Citation Download Citation

Audrey Nelson and Andrian Kouznetsov "A 4.26-μm RCLED and a fast low-power CO₂ sensor", Proc. SPIE 7231, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIII, 72310V (3 February 2009); https://doi.org/10.1117/12.809293

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