17 October 2012 Wavelength/frequency-division multiplexing of heterodyning fiber grating laser sensors with the assistance of CO2-laser treatment
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84211N (2012); doi: 10.1117/12.974910
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
In this paper, we demonstrate the implementation of a 1×10 array of heterodyning fiber grating laser sensors, pumped by a single 980 nm laser diode. The sensors are wavelength-multiplexed by inscribing fiber gratings with different periods and frequency-multiplexed in the RF domain with the assistance of CO2-laser treatment. Through the side irradiation from the CO2 laser, the intra-cavity birefringence can be significantly changed and the output frequency of the individual lasers can be continuously adjusted. The frequency range that can be achieved is as much as 1.5 GHz. As a result, the multiplexing capability of this kind of sensor is greatly improved.
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Mengping Li, Long Jin, Bai-Ou Guan, "Wavelength/frequency-division multiplexing of heterodyning fiber grating laser sensors with the assistance of CO2-laser treatment", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211N (17 October 2012); doi: 10.1117/12.974910; https://doi.org/10.1117/12.974910
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KEYWORDS
Fiber lasers

Sensors

Carbon dioxide lasers

Multiplexing

Birefringence

Fiber optics sensors

Heterodyning

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