Femtosecond laser pulses induced ultra-long-period fiber gratings for simultaneous measurement of high temperature and refractive index

Optik ◽  
2013 ◽  
Vol 124 (12) ◽  
pp. 1303-1306 ◽  
Author(s):  
Yi Liu ◽  
Shiliang Qu
Keyword(s):  
Refractive Index ◽  
High Temperature ◽  
Femtosecond Laser ◽  
Simultaneous Measurement ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

Fabrication of long-period fiber gratings by focused irradiation of infrared femtosecond laser pulses

1999 ◽  
Vol 24 (10) ◽  
pp. 646 ◽  
Author(s):  
Yuki Kondo ◽  
Kentaro Nouchi ◽  
Tsuneo Mitsuyu ◽  
Masaru Watanabe ◽  
Peter G. Kazansky ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

LASER DIRECT WRITING OF LONG PERIOD FIBER GRATING BY 800 NM FEMTOSECOND LASER PULSES

2008 ◽  
Vol 17 (04) ◽  
pp. 425-433 ◽  
Author(s):  
SHUANGCHEN RUAN ◽  
YI HUANG ◽  
CHENLIN DU ◽  
YONGQIN YU
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Transmission Loss ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Direct Writing ◽  
Loss Peak ◽  
Laser Direct Writing ◽  
Time Duration ◽  
Long Period

Femtosecond laser pulses with ultrashort time duration and ultrahigh peak power can cause the refractive index change in transparent materials and micron scale machining precision. Long period fiber gratings (LPFGs) with different periods and different grating lengths in the standard single mode fiber were fabricated, using laser direct writing method, by femtosecond laser pulses with pulse width of 200 fs at a center wavelength of 800 nm in air. The transmission spectra were studied in the range of 1510 nm to 1610 nm. Two LPFGs with period of 400 μm, and 550 μm, respectively fabricated with same irradiation power of 275 mW, were shown. The loss peak of 1552 nm, the transmission loss of 16 dB and the FWHM of 20 nm were obtained when the period of LPFG was 400 μm, while the loss peak of 1588 nm, the transmission loss of 20 dB and the FWHM of 25 nm were achieved when the period of LPFG was 550 μm. According to the theory of mode field coupling for long period grating, it was indicated that the modulation of refractive index Δn was in the level of 10-2.

Temperature and refractive index measurements using long-period fiber gratings fabricated by femtosecond laser

2011 ◽  
Author(s):  
Yongqin Yu ◽  
Jiarong Zheng ◽  
Kai Yi ◽  
Shuangchen Ruan ◽  
Chenlin Du ◽  
...  
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

Femtosecond Laser Inscribed Small-Period Long-Period Fiber Gratings With Dual-Parameter Sensing

2018 ◽  
Vol 18 (3) ◽  
pp. 1100-1103 ◽  
Author(s):  
Zhong-Ming Zheng ◽  
Yong-Sen Yu ◽  
Xuan-Yu Zhang ◽  
Qi Guo ◽  
Hong-Bo Sun
Keyword(s):  
Femtosecond Laser ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Small Period
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