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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 23, Iss. 8 — Aug. 1, 2005
  • pp: 2449–

Fiber-Coupled In-Line Heterodyne Optical Interferometer for Minimally Invasive Sensing

Muzammil Arshad Arain and Nabeel A. Riza

Journal of Lightwave Technology, Vol. 23, Issue 8, pp. 2449- (2005)

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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.

© 2005 IEEE

Muzammil Arshad Arain and Nabeel A. Riza, "Fiber-Coupled In-Line Heterodyne Optical Interferometer for Minimally Invasive Sensing," J. Lightwave Technol. 23, 2449- (2005)

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