@inproceedings{47e1874327434e9a961df960089044cf,
title = "Nanosecond Pulse Generation in an All-Fiber Laser at 1706 nm Based on Gain Switching",
abstract = "This work demonstrates an all-fiber, gain-switched Tm3+-doped fiber laser operating at 1706 nm. The laser is based on a compact 40-cm Fabry-P{\'e}rot cavity using a 7-cm Tm3+-doped fiber and fiber Bragg gratings. The Tm3+-doped fiber laser cavity was pumped by a directly modulated 1560-nm DFB laser diode. The 1560-nm pump laser was amplified through multistage EDFA and EYDFA, which enabled gain switching with a pump threshold of 1.2 W and a slope efficiency of 27\%. The 1.7 µm output achieves a narrow 3 dB bandwidth of 0.12 nm and high spectral SNR (>48 dB). The feasibility for biomedical applications was demonstrated through photoacoustic (PA) signal generation using polypropylene samples, which produced a peak-to-peak ultrasound signal of 5 mV.",
keywords = "1.7 µm laser, Fiber Laser, Gain Switching, Thulium-Doped Fiber",
author = "Kim, \{Jee Hwan\} and Junha Jung and Kwon, \{Suh Young\} and Taeho Woo and Janghyun Ryu and Hongsung An and Yongjae Lee and Taejoong Eom and Lee, \{Ju Han\}",
note = "Publisher Copyright: {\textcopyright} 2025 SPIE.; Fiber Lasers XXII: Technology and Systems 2025 ; Conference date: 27-01-2025 Through 31-01-2025",
year = "2025",
doi = "10.1117/12.3040825",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Thomas Schreiber and Matthias Savage-Leuchs",
booktitle = "Fiber Lasers XXII",
address = "United States",
}