All-Fiber High-Energy Mode-Locked Ytterbium-Doped Fiber Laser with Bismuth Telluride Nanosheet Saturable Absorber

• Published in: Crystals
• Main Author: Haris H.; Batumalay M.; Jin T.S.; Muhammad A.R.; Markom A.M.; Izani M.H.; Hasnan M.M.I.M.; Saad I.
• Format: Article
• Language: English
• Published: MDPI 2022
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85141879595&doi=10.3390%2fcryst12111507&partnerID=40&md5=a41bc2e28a9b060f582e2b5ed8cb7b67
• ISSN: 20734352
• DOI: 10.3390/cryst12111507

Utilizing bismuth telluride (Bi2Te3) nanosheet saturable absorbers (SA), a remarkable source of continuous-wave infrared radiation known for its high efficiency and wide range of accessible wavelengths, has been successfully developed. The mode-locking bright pulses have a repetition frequency of 9.5 MHz and a pulse width of 0.6 ps at a power level of 203.5 mW. The optical spectrum has its center at 1050.23 nm and delivers pulse energies of 2.13 nJ and output power of 20.3 mW. Using a straightforward 18 m long ring design and a laser cavity with a −19.9 ps2/km dispersion, a 44 dB signal-to-noise ratio (SNR) was achieved to demonstrate the pulse’s strong stability. © 2022 by the authors.