Fabrication of high-reflectivity superimposed multiple-fiber Bragg gratings with unequal wavelength spacing

2002 ◽  
Vol 27 (15) ◽  
pp. 1306 ◽  
Author(s):  
A. Arigiris ◽  
M. Konstantaki ◽  
A. Ikiades ◽  
D. Chronis ◽  
P. Florias ◽  
...  
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Wavelength Spacing ◽  
High Reflectivity

scholarly journals Femtosecond laser direct-written fiber Bragg gratings with high reflectivity and low loss at wavelengths beyond 4 µm

2020 ◽  
Vol 45 (15) ◽  
pp. 4316 ◽  
Author(s):  
Gayathri Bharathan ◽  
Toney Teddy Fernandez ◽  
Martin Ams ◽  
Jean-Yves Carrée ◽  
Samuel Poulain ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Low Loss ◽  
High Reflectivity

scholarly journals Optimized laser-written ZBLAN fiber Bragg gratings with high reflectivity and low loss

2019 ◽  
Vol 44 (2) ◽  
pp. 423 ◽  
Author(s):  
Gayathri Bharathan ◽  
Toney Teddy Fernandez ◽  
Martin Ams ◽  
Robert I. Woodward ◽  
Darren D. Hudson ◽  
...  
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Low Loss ◽  
High Reflectivity

scholarly journals Femtosecond Laser Fabricated Apodized Fiber Bragg Gratings Based on Energy Regulation

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 110
Author(s):  
Qi Guo ◽  
Zhongming Zheng ◽  
Bo Wang ◽  
Xuepeng Pan ◽  
Shanren Liu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Suppression Ratio ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Side Lobe ◽  
Energy Regulation ◽  
Fiber Gratings ◽  
Core Diameter ◽  
High Reflectivity ◽  
Side Lobe Suppression

In this paper, an energy regulation method based on the combination of a half-wave plate (HWP) and a polarization beam splitter (PBS) is proposed for the fabrication of apodized fiber gratings, which can effectively improve the side lobe suppression ratio of high-reflectivity fiber Bragg gratings (FBGs) fabricated by femtosecond laser. The apodized FBGs prepared by this method has good repeatability and flexibility. By inputting different types of apodization functions through the program, the rotation speed of the stepping motor can be adjusted synchronously, and then the position of the HWP can be accurately controlled so that the laser energy can be distributed as an apodization function along the axial direction of the fiber. By using the energy apodization method, the gratings with a reflectivity of 75% and a side lobe suppression ratio of 25 and 32 dB are fabricated in the fiber with a core diameter of 9 and 4.4 μm, respectively. The temperature and strain sensitivities of the energy-apodized fiber gratings with a core diameter of 4.4 μm are 10.36 pm/°C and 0.9 pm/με, respectively. The high-reflectivity gratings fabricated by this energy apodization method are expected to be used in high-power narrow-linewidth lasers and wavelength division multiplexing (WDM) systems.

Fabrication of high-reflectivity fiber Bragg gratings by excimer laser irradiated phase masks

1996 ◽  
Author(s):  
Genxiang Chen ◽  
Shuisheng Jian ◽  
Ling Yang ◽  
Xun Li ◽  
Huang Ge ◽  
...  
Keyword(s):  
Excimer Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
High Reflectivity
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