13 February 2018 Tunable vertical cavity surface emitting lasers for use in the near infrared biological window
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Abstract
We present a near-infrared tunable vertical cavity surface emitting laser (VCSEL) based upon a unique electrothermally tunable microelectromechanical systems (MEMS) topside mirror designed for tissue imaging and sensing. At room temperature, the laser is tunable from 769-782nm with single mode CW output and a peak output power of 1.3mW. We show that the tunable VCSEL is suitable for use in frequency domain diffuse optical spectroscopy by measuring the optical properties of a tissue-simulating phantom over the tunable range. These results indicate that tunable VCSELs may be an attractive choice to enable high spectral resolution optical sensing in a wearable format.
Conference Presentation
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Vincent J. Kitsmiller, Matthew Dummer, Klein Johnson, Thomas D. O'Sullivan, "Tunable vertical cavity surface emitting lasers for use in the near infrared biological window ", Proc. SPIE 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII, 104880L (13 February 2018); doi: 10.1117/12.2290899; https://doi.org/10.1117/12.2290899
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