We designed and analyzed a novel optically pumped gas THz fiber laser (OPTFL) based on hollow-core anti-resonant fiber (HC-ARF). The OPTFL filled with methanol vapor and pumped by a continuous-wave tunable CO2 laser. Combining the rate equations and the THz wave transmission theory in HC-ARF, factors that impacting THz output are analyzed. By investigating the inner structure of HC-ARF, a HC-ARF with an intrinsic single-mode transmission and a low confinement loss lower than 0.2 dB/m in OPTFL is proposed for efficiently transmitting THz waves. Theoretical analysis indicate that by appropriately increasing the cavity length, the output power of OPTFL is expected to reach the magnitude of 100 milliwatts with optimal operating conditions. The results provide an available method for highperformance THz laser source.

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112601G (21 February 2020); doi: 10.1117/12.2544556

Published in SPIE Proceedings Vol. 11260:
Fiber Lasers XVII: Technology and Systems
Liang Dong, Editor(s)