Spectral characteristics of curved long period fiber gratings

2000 ◽  
Author(s):  
J. L. Arce-Diego
Keyword(s):  
Spectral Characteristics ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

Spectral Characteristics of Cascaded Tilted Long Period Fiber Gratings

2015 ◽  
Vol 42 (10) ◽  
pp. 1005005
Author(s):  
陆建国 Lu Jianguo ◽  
顾铮Tian Gu Zhengtian ◽  
高侃 Gao Kan
Keyword(s):  
Spectral Characteristics ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

Spectral characteristics in long-period fiber gratings with nonuniform symmetrically ring shaped coatings

2007 ◽  
Vol 90 (14) ◽  
pp. 141105 ◽  
Author(s):  
Andrea Cusano ◽  
Domenico Paladino ◽  
Antonello Cutolo ◽  
Ignacio Del Villar ◽  
Ignacio R. Matias ◽  
...  
Keyword(s):  
Spectral Characteristics ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

Spectral Characteristics of Triple-Clad Cascaded Long-Period Fiber Gratings

2008 ◽  
Vol 35 (10) ◽  
pp. 1532-1537 ◽  
Author(s):  
赵晓云 Zhao Xiaoyun ◽  
顾铮天 Gu Zhengtian
Keyword(s):  
Spectral Characteristics ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

scholarly journals Spectral Characteristics of Square-Wave-Modulated Type II Long-Period Fiber Gratings Inscribed by a Femtosecond Laser

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3278
Author(s):  
Xiaofan Zhao ◽  
Hongye Li ◽  
Binyu Rao ◽  
Meng Wang ◽  
Baiyi Wu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Duty Cycle ◽  
Spectral Characteristics ◽  
Great Influence ◽  
Higher Order ◽  
Type Ii ◽  
Fiber Gratings ◽  
Square Wave ◽  
Long Period ◽  
Long Period Fiber Gratings

We study here the spectral characteristics of square-wave-modulated type II long-period fiber gratings (LPFGs) inscribed by a femtosecond laser. Both theoretical and experimental results indicate that higher-order harmonics refractive index (RI) modulation commonly exists together with the fundamental harmonic RI modulation in such LPFGs, and the duty cycle of a square wave has a great influence on the number and amplitudes of higher-order harmonics. A linear increase in the duty cycle in a series of square wave pulses will induce another LPFG with a minor difference in periods, which is useful for expanding the bandwidth of LPFGs. We also propose a method to reduce insertion loss by fabricating type II LPFGs without higher-order harmonic resonances. This work intensifies our comprehension of type II fiber gratings with which novel optical fiber sensors can be fabricated.

scholarly journals Long period fiber gratings written in photonic crystal fibers by use of CO2 laser

2013 ◽  
Vol 3 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Yiping Wang ◽  
Changrui Liao ◽  
Xiaoyong Zhong ◽  
Jiangtao Zhou ◽  
Yingjie Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Co2 Laser ◽  
Photonic Crystal Fibers ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Crystal Fibers
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