Title: Compact optical curvature sensor with a flexible microdisk laser on a polymer substrate
Authors: Shih, M. H.
Hsu, K. S.
Kunag, Wan
Yang, Y. C.
Wang, Y. C.
Tsai, S. K.
Liu, Y. C.
Chang, Z. C.
Wu, M. C.
Department of Photonics
Issue Date: 15-Sep-2009
Abstract: We demonstrate a chip-scale compact optical curvature sensor. It consists of a low threshold InGaAsP microdisk laser on a flexible polydimethylsiloxane polymer substrate. The curvature dependence of lasing wavelength was characterized by bending the cavity at different bending radii. The measurements showed that the lasing wavelength decreases monotonously with an increasing bending curvature. A good agreement between experiment and three-dimensional finite-difference time-domain simulation was also obtained. The sensitivity of the compact device to the bending curvature is -23.7 nm/mm from the experiment. (C) 2009 Optical Society of America
URI: http://dx.doi.org/10.1364/OL.34.002733
ISSN: 0146-9592
DOI: 10.1364/OL.34.002733
Volume: 34
Issue: 18
Begin Page: 2733
End Page: 2735
Appears in Collections:Articles