Integrated optic pressure sensor using intermodal interference between twomutual orthogonal guided-modes

Citation
M. Ohkawa et al., Integrated optic pressure sensor using intermodal interference between twomutual orthogonal guided-modes, OPT REV, 7(2), 2000, pp. 144-148
Citations number
10
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL REVIEW
ISSN journal
1340-6000 → ACNP
Volume
7
Issue
2
Year of publication
2000
Pages
144 - 148
Database
ISI
SICI code
1340-6000(200003/04)7:2<144:IOPSUI>2.0.ZU;2-8
Abstract
we theoretically and experimentally investigated fundamental characteristic s of an integrated optic pressure sensor using intermodal interference betw een the lowest-order TM-like and TE-like modes. The sensor consists of a re ctangular diaphragm and a straight single-mode waveguide along an edge of t he diaphragm. Its operation is based on a difference of phase retardations produced in the two guided modes through the photoelastic effect. The senso r was fabricated by bonding two glass substrates together: a Coming 0211 gl ass 300 mu m thick to form a waveguide and a thick substrate with a 10 mm x 10 mm square hole to define the diaphragm. The fabricated sensor was succe ssfully tested using a He-Ne laser at 633 nm. The halfwave pressure was mea sured to be 77 kPa which is almost double the theoretical estimate.