Type IIa Bragg gratings formed in microfibers.
In this Letter, Type IIa Bragg gratings are inscribed into microfibers. The large germanium-doped core region of the multimode fiber provides the necessary photosensitivity to form a Type IIa grating when it is drawn down to the microscale. Reducing the diameter of the microfiber due to lower saturate modulation and the amplified tension-strain transformation effect can accelerate the formation of a Type IIa grating. This provides an efficient method for the fabrication of fiber gratings with 800°C temperature resistance.
Yang
Y
Ran
Long
L
Jin
Shuai
S
Gao
Li-Peng
LP
Sun
Yun-Yun
YY
Huang
Jie
J
Li
Bai-Ou
BO
Guan