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Optical biochemical sensor based on half-circled microdisk laser diode

Title
Optical biochemical sensor based on half-circled microdisk laser diode
Authors
Kim, Hong-SeungPark, Jung-MinRyu, Jin HyeokKim, Sung-BokKim, Chil MinChoi, Young-WanOh, Kwang-Ryong
DGIST Authors
Kim, Hong-Seung; Ryu, Jin Hyeok; Kim, Chil Min
Issue Date
2017
Citation
Optics Express, 25(21), 24939-24945
Type
Article
Article Type
Article
Keywords
EstersGas DetectorsQ Factor MeasurementBio-Chemical SensorDimethyl MethylphosphonateIntegrated PhotonicsMicrodisk LaserOptical CouplingsReproducibilitiesSide Mode Suppression RatiosWavelength ShiftLasers
ISSN
1094-4087
Abstract
In this study, a half-circled cavity based microdisk laser diode is proposed and demonstrated experimentally for an integrated photonic biochemical sensor. Conventional microdisk sensors have limitations in optical coupling and reproducibility. In order to overcome these drawbacks, we design a novel half-circled micro disk laser (HC-MDL) which is easy to manufacture and has optical output directionality. The Q-factor of the fabricated HC-MDL was measured as 7.72 × 106 using the self-heterodyne method and the side mode suppression ratio was measured as 23 dB. Moreover, gas sensing experiments were performed using the HC-MDL sensor. A wavelength shift response of 14.21 pm was obtained for 100 ppb dimethyl methylphosphonate (DMMP) gas and that of 14.70 pm was obtained for 1 ppm ethanol gas. These results indicate the possibility of highly sensitive gas detection at ppb levels using HC-MDL. This attractive feature of the HC-MDL sensor is believed to be very useful for a wide variety of optical biochemical sensor applications. © 2017 Optical Society of America.
URI
http://hdl.handle.net/20.500.11750/4711
DOI
10.1364/OE.25.024939
Publisher
OSA - The Optical Society
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceMicro Laser Laboratory1. Journal Articles


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