Mode converter with C+L band coverage based on the femtosecond laser inscribed long period fiber grating

2021 ◽  
Author(s):  
Songnian Fu ◽  
cailong yang ◽  
Cong Zhang ◽  
Lei Shen ◽  
Yuncai Wang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Mode Converter ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
L Band ◽  
Period Fiber Grating

All-fiber second-order Mode Converter Based on Twisted Long-period Fiber Grating

2021 ◽  
Author(s):  
Mao Feng ◽  
Wenzhe Chang ◽  
Baiwei Mao ◽  
Pan Wang ◽  
Zhi Wang ◽  
...  
Keyword(s):  
Second Order ◽  
Mode Converter ◽  
Fiber Grating ◽  
Order Mode ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

High temperature-sensitivity sensor based on long period fiber grating inscribed with femtosecond laser transversal-scanning method

2017 ◽  
Vol 15 (9) ◽  
pp. 090602 ◽  
Author(s):  
Xinran Dong Xinran Dong ◽  
Zheng Xie Zheng Xie ◽  
Yuxin Song Yuxin Song ◽  
Kai Yin Kai Yin ◽  
Dongkai Chu Dongkai Chu ◽  
...  
Keyword(s):  
High Temperature ◽  
Femtosecond Laser ◽  
Temperature Sensitivity ◽  
Fiber Grating ◽  
Scanning Method ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating ◽  
High Temperature Sensitivity

scholarly journals Wavelength-Tunable, Ultra-Broadband, Biconical, Long-Period Fiber Grating Mode Converter Based on the Dual-Resonance Effect

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5970
Author(s):  
Yu Zheng ◽  
Huiyi Guo ◽  
Mao Feng ◽  
Zhi Wang ◽  
Yange Liu
Keyword(s):  
Mode Conversion ◽  
Resonance Effect ◽  
Mode Converter ◽  
Ultra Wideband ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Wavelength Tunable ◽  
Dual Resonance ◽  
Period Fiber Grating

We demonstrated a wavelength-tunable, ultra-wideband, biconical, long-period fiber grating (BLPFG) mode converter in a two-mode fiber based on fusion taper technology and CO2 laser writing technology. Theoretical and experimental results show that after changing the diameter of the two-mode fiber by fusing and tapering, the dispersion turning point of the fiber is adjusted and wavelength-tunable broadband mode conversion is achieved efficiently. Theoretical simulation shows that the mode conversion bandwidth can cover the O + E + S + C band. In the experiment, we fabricated adiabatic tapers with cladding diameters of 113 μm and 121 μm and wrote gratings on these tapers to achieve dual-resonance coupling, thus realizing mode conversion from LP01 to LP11, with a 15 dB bandwidth of 148.8 nm from 1229.0 nm to 1377.8 nm and of 168.5 nm from 1319.7 nm to 1488.2 nm, respectively. As far as we know, this is the first time that fusion taper technology has been used to adjust the window of the dual-resonant coupling of an optical fiber. This work broadens the scope of application of the dual-resonance effect and proposes a general method for widening the bandwidth of a fiber grating with tunable wavelength.

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