Fiber-coupled in-line heterodyne optical interfefometer for minimally invasive sensing
Abbreviated Journal Title
J. Lightwave Technol.
acoustooptic devices; heterodyne optical inter-ferometers; optical; sensors; scanning interferometers; RING INTERFEROMETER; SENSOR; Engineering, Electrical & Electronic; Optics; Telecommunications
In this paper, the first fiber-coupled no-moving-parts scanning heterodyne interferometer design using a single acoustooptic device, (AOD) is reported. The design, features a high-stability inline reflective architecture with free-space-scanned minimally invasive sensing via a multizone reflective sensor chip. The common path fiber interconnection allows robust remoting of the compact sensing front end. A proof-of-concept sensing experiment measuring voltage-dependent birefringence is successfully conducted using a voltage-controlled nematic liquid crystal (NLC) sensor chip. The system features a 4.69-dB optical loss, a 200-MHz output frequency, and a 1550-nm eye-safe operation wavelength. Applications for the system include any fiber-remoted sensing using the proposed free-space, minimally invasive interrogating optical beams.
Journal of Lightwave Technology
"Fiber-coupled in-line heterodyne optical interfefometer for minimally invasive sensing" (2005). Faculty Bibliography 2000s. 4970.