Regenerated distributed Bragg reflector fiber lasers for high-temperature operation.
This Letter presents distributed Bragg reflector (DBR) fiber lasers for high-temperature operation at 750°C. Thermally regenerated fiber gratings were used as the feedback elements to construct an erbium-doped DBR fiber laser. The output power of the fiber laser can reach 1 mW at all operating temperatures. The output power fluctuation tested at 750°C was 1.06% over a period of 7 hours. The thermal regeneration grating fabrication process opens new possibilities to design and to implement fiber laser sensors for extreme environments.
Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
Rongzhang
R
Chen
Aidong
A
Yan
Mingshan
M
Li
Tong
T
Chen
Qingqing
Q
Wang
John
J
Canning
Kevin
K
Cook
Kevin P
KP
Chen