New method of writing long-period fiber gratings using high-frequency CO2 laser

In the paper, the Long period fiber gratings (LPFG) were fabricated in a single-mode fiber using a high frequency CO2 laser system with the point-to-point technique. The experimental setup consists of a CO2 laser controlling system, a focusing system located at a motorized linear stage, a fiber alignment stage, and an optical spectrum analyzer to monitor the transmission spectrum of the LPFG. The period of the LPFG is precisely inscribed by periodically turning on/off the laser shutter while the motorized linear stage is driven to move at a constant speed. The efficiency of fiber writing process is improved.

[1]  Keang-Po Ho,et al.  Dynamic power-equalized EDFA module based on strain tunable fiber Bragg gratings , 1999, IEEE Photonics Technology Letters.

[2]  N. S. Bergano,et al.  Long-period fiber-grating-based gain equalizers. , 1996, Optics letters.

[3]  Renfeng Xue,et al.  Axial strain sensor based on long-period fiber gratings , 2014, Other Conferences.

[4]  T. Mizunami,et al.  Long-period fiber gratings and their sensing applications , 2012, 2012 International Conference on Fiber Optics and Photonics (PHOTONICS).

[5]  Agostino Iadicicco,et al.  Fabrication and Characterization of Long-Period Gratings in Hollow Core Fibers by Electric Arc Discharge , 2015, IEEE Sensors Journal.

[6]  Alan D. Kersey,et al.  Analysis of the response of long period fiber gratings to external index of refraction , 1998 .

[7]  Li Wang,et al.  CO2-Laser-Induced Long Period Fiber Gratings in Few Mode Fibers , 2015, IEEE Photonics Technology Letters.

[8]  Shien-Kuei Liaw,et al.  Dynamic power-equalized EDFA module based on strain tunable fiber Bragg gratings , 1999 .

[9]  Changyu Shen,et al.  Long-Period Fiber Grating Based Cantilever Strain Sensor , 2012, 2012 Symposium on Photonics and Optoelectronics.

[10]  Chia-Chin Chiang,et al.  Optical fiber strain sensor based on sandwiched long-period fiber gratings with a surface bonding layer , 2014 .

[11]  John E. Sipe,et al.  Long-period fiber gratings as band-rejection filters , 1995 .

[12]  Ponciano Jorge Escamilla-Ambrosio,et al.  Fabrication of long period fiber gratings by electric arc for strain sensing applications , 2014, Optics & Photonics - Optical Engineering + Applications.

[13]  Kwang Taek Kim,et al.  Easy fabrication of long-period fiber grating by winding a wire around an optical fiber fixed to cylindrical ROD , 2012 .