Molybdenum disulfide saturable absorber for eye-safe mode-locked fiber laser generation

Latiff, Anas Abdul and Cheng, Xiau San and Rusdi, Muhammad Farid Mohd and Paul, Mukul Chandra and Harun, Sulaiman Wadi and Ahmad, Harith (2018) Molybdenum disulfide saturable absorber for eye-safe mode-locked fiber laser generation. Journal of Nonlinear Optical Physics & Materials, 27 (01). p. 1850010. ISSN 0218-8635, DOI

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We demonstrated an all-fiber mode-locked Thulium-Holmium co-doped fiber laser (THDFL) based on molybdenum disulfide (MoS2) tape saturable absorber. The THDFL generates a mode-locked pulse in anomalous regime at 1,979nm using 5m long Thulium-Holmium co-doped (THDF) as a gain medium. Through mechanical exfoliation method, the MoS2 was mechanically extracted from a commercial MoS2 crystal by using a clear scotch tape. Through balanced twin-detector measurement, the obtained MoS2 tape has a nonlinear absorption of 10% with 100MW/cm2 saturation intensity. Under 775mW to 852mW pump power, a stable pulse train was obtained at 9.12MHz repetition rate with a signal-to-noise ratio (SNR) of 45dB. The maximum output power and pulse energy were measured about 20mW and 2.2nJ, respectively. With a 3-dB spectral bandwidth of 2.1nm, the minimum possible pulse width was determined as 1.97ps.

Item Type: Article
Uncontrolled Keywords: 2-micron region; Fiber laser; mode-locking operation; real saturable absorber
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Jun 2019 01:16
Last Modified: 27 Jun 2019 01:16

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