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A multiwavelength linear-cavity laser array for long-distance sensing is designed and experimentally demonstrated. It is a semiconductor optical amplifier (SOA) integrating a $1\times N$ optical switch, formed by a $2\times 2$ fiber loop mirror and fiber Bragg grating (FBG) as cavity ends. We investigate the laser system output characteristics and evaluate the sensor performance for different...
Single-longitudinal-mode (SLM) wavelength-tunable fiber lasers are extensively explored both in science and industry because of the applications in optical switching, network protection, instrument testing, optical sensors, and medical applications. In this paper, we present tunable SLM linear-cavity fiber lasers from design to experimental investigation.
We demonstrated a fiber sensor for simultaneous measurement of refractive index and temperature by cascading one long period grating and one modal interferometer. Cladding mode interference between them was also investigated here.
To enable the application of optical fiber sensors to aerospace vehicles, the sensor interrogation or data acquisition system has to meet small size and low weight requirements. This paper presents the developmental work of an echelle diffractive gratings (EDGs) demultiplexer-based optical fiber sensor interrogation system. The operation principle of this system and its application to fiber Bragg...
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