论文信息 - Wavelength/frequency-division multiplexing of heterodyning fiber grating laser sensors with the assistance of CO2-laser treatment

Wavelength/frequency-division multiplexing of heterodyning fiber grating laser sensors with the assistance of CO2-laser treatment

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.

Bai-Ou Guan | Long Jin | Meng-Ping Li

[1] F. Alhassen,et al. Fabrication and Mode Identification of Compact Long-Period Gratings Written by CO$_{2}$ Laser , 2008, IEEE Photonics Technology Letters.

[2] Jian Ju,et al. Directional Bend Sensing With a CO $_{2}$-Laser-Inscribed Long Period Grating in a Photonic Crystal Fiber , 2009, Journal of Lightwave Technology.

[3] K. Morishita,et al. Fabrication and resonance wavelengths of long-period gratings written in a pure-silica photonic crystal fiber by the glass structure change , 2004, Journal of Lightwave Technology.

[4] Yiping Wang,et al. Review of long period fiber gratings written by CO2 laser , 2010 .

[5] Hwa-Yaw Tam,et al. Polarimetric Heterodyning Fiber Grating Laser Sensors , 2012, Journal of Lightwave Technology.

[6] Hwa-Yaw Tam,et al. Distributed bragg-reflector fiber-laser sensor for lateral force measurement , 2007 .

[7] Hwa-Yaw Tam,et al. Dual polarization fiber grating laser hydrophone. , 2009, Optics express.

[8] S. Rashleigh. Origins and control of polarization effects in single-mode fibers (A) , 1982 .

[9] J. Ju,et al. Hollow-core photonic bandgap fiber polarizer. , 2008, Optics letters.

[10] G. Edvell,et al. A 16 channel fibre laser sensor array , 2006, ACOFT/AOS 2006 - Australian Conference on Optical Fibre Technology/Australian Optical Society.

[11] Bai-Ou Guan,et al. Beat frequency trimming of dual-polarization fiber grating lasers for multiplexed sensor applications. , 2011, Optics express.