Switchable fiber coupling using variable-focal-length microlenses

Authors
Smith, PJ Taylor, CM McCabe, EM Selviah, DR Day, SE Commander, LG
Citation
Pj. Smith et al., Switchable fiber coupling using variable-focal-length microlenses, REV SCI INS, 72(7), 2001, pp. 3132-3134
Citations number
6
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
REVIEW OF SCIENTIFIC INSTRUMENTS
ISSN journal
00346748 → ACNP
Volume
72
Issue
7
Year of publication
2001
Pages
3132 - 3134
Database
ISI
SICI code
0034-6748(200107)72:7<3132:SFCUVM>2.0.ZU;2-O
Abstract
An array of microlenses, with focal lengths that can be electrically varied , can control the coupling of light into a single mode fiber using an appli ed voltage. We have examined this technology with a view to the design of a confocal microlens/image-fiber endoscope. Maximum coupling to the fiber wa s found to occur over a voltage range of similar to1 V and over an axial ra nge of 1 cm. Contrast ratios between minimum and maximum coupling of up to 30 dB were demonstrated. (C) 2001 American Institute of Physics.