Optical chemsensors utilizing long-period fiber gratings UV-inscribed in D-fiber with enhanced sensitivity through cladding etching

Chen, Xianfeng F.; Zhou, Kaiming; Zhang, Lin and Bennion, Ian (2004). Optical chemsensors utilizing long-period fiber gratings UV-inscribed in D-fiber with enhanced sensitivity through cladding etching. IEEE photonics technology letters, 16 (5), pp. 1352-1354.

Abstract

A novel implementation of an optical chemsensor device is reported based on long-period fiber grating structures ultraviolet-inscribed in D-fiber, with sensitivity enhancement by cladding etching. The results of a comparative study using D-fiber devices and similar structures in standard optical fiber reveal that the D-fiber devices offer substantially greater sensitivity both with and without etching. Based on a calibrated response to changes in refractive index, the grating devices have been used to measure the concentrations of aqueous sugar solutions, demonstrating the potential capability to detect concentration changes as small as 0.2%.

Uncontrolled Keywords: Bragg gratings, chemical sensors, etching, fiber gratings, optical fiber devices, optical fiber polarization, optical fiber sensors, optical refraction, optical sensors, temperature sensors, chemical variables measurement, fibre optic sensors, laser beam etching, optical fibre cladding, refractive index, refractive index measurement, refractometers, D-fiber devices, UV inscription, aqueous sugar solutions, calibrated response, cladding etching, concentration changes, enhanced sensitivity, grating devices, long-period fiber gratings, optical chemsensors, ultraviolet inscription
Published Date: 2004-05

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