Terahertz radiation based on fiber-pigtailed InGaAs photoconductive antenna pumped by 1030-nm mode-locked Yb-doped fiber laser

Ji Su Kim; Sang-Pil Han; Kiwon Moon; Han-Cheol Ryu; Kyung Hyun Park; Min Yong Jeon

doi:10.1117/12.2265379

23 April 2017 Terahertz radiation based on fiber-pigtailed InGaAs photoconductive antenna pumped by 1030-nm mode-locked Yb-doped fiber laser

Ji Su Kim, Sang-Pil Han, Kiwon Moon, Han-Cheol Ryu, Kyung Hyun Park, Min Yong Jeon

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103237V (2017) https://doi.org/10.1117/12.2265379
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We present a terahertz (THz) radiation pumped by a passively mode-locked Yb-doped fiber laser using two fiberpigtailed log-spiral-based low-temperature-grown (LTG) InGaAs photoconductive antenna (PCA) modules. The modelocked fiber laser produces over 220 mW of the average optical power with positively chirped of 1.49 ps pulses. In order to generate THz radiation using the fiber-pigtailed PCA modules, the mode-locked optical pulses are pre-chirped with 538 fs using two diffraction gratings. We successfully achieved THz radiation over 2.0 THz using the pre-chirped pulses. We successfully observed the various absorption lines of water vapor dips in the free space of 120 mm.

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Ji Su Kim, Sang-Pil Han, Kiwon Moon, Han-Cheol Ryu, Kyung Hyun Park, and Min Yong Jeon "Terahertz radiation based on fiber-pigtailed InGaAs photoconductive antenna pumped by 1030-nm mode-locked Yb-doped fiber laser", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103237V (23 April 2017); https://doi.org/10.1117/12.2265379

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