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22 April 2016 Optical heterodyne detection for ultra-high Q micro-disk laser sensor
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Abstract
In this paper, we propose a bio-sensing method using optical heterodyne detection for ultra-high Q micro-disk laser (MDL) sensor platform. MDL structure with ultra-high Q-factor (> 108) has advantage in detecting a small variation of the lasing wavelength. For example, when a single molecule is attached to sidewall of MDL, the lasing wavelength is changed by sub-pm. Optical spectrum analyzer (OSA) has limits to detect sub-pm variation in the resonant wavelength because of the spectral resolution. In order to overcome this limitation, we used a heterodyne detection method which needs two MDLs with the same characteristics.
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Myung-Gi Ji, Byung-Hee Son, Tae-Ryong Kim, Mi Jung, Hong-Seung Kim, Chil-Min Kim, Kwang Ryong Oh, and Young-Wan Choi "Optical heterodyne detection for ultra-high Q micro-disk laser sensor", Proc. SPIE 9727, Laser Resonators, Microresonators, and Beam Control XVIII, 97271A (22 April 2016); https://doi.org/10.1117/12.2212466
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