Saturable absorption performance of large area monolayer MoS2 coated planarized optical waveguide

Chew, Jing Wen and Chong, Wu Yi and Yap, Yuen Kiat and Ng, Kok Bin and Gan, Soon Xin and Ahmad, Harith (2022) Saturable absorption performance of large area monolayer MoS2 coated planarized optical waveguide. Laser Physics Letters, 19 (11). ISSN 1612-2011, DOI

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The development of compact waveguide-based pulsed lasers has been of great interest in the past two decades. This is supported by the rapid development of two-dimensional (2D) materials saturable absorbers (SAs). In this paper, we integrate a large area monolayer molybdenum disulphide (MoS2) on a planarized silica optical waveguide and studied its performance as an SA. A single layer MoS2 film on polydimethylsiloxane substrate is mechanically transferred to the planarized optical waveguide. The single layer MoS2 can interact with the evanescent field of the waveguide core mode, thus achieving SA. The MoS2-coated waveguide is then integrated into an erbium-doped fibre laser cavity that operates in the telecommunication wavelength region. Q-switching is achieved with a repetition rate, pulse duration and maximum pulse energy of 22.5 kHz, 5.24 mu s and 4.1 nJ, respectively at a pump power of 122.8 mW. The results show that 2D material thin films can be integrated onto a planarized optical waveguide to act as SAs. These findings show the potential of using 2D materials in developing compact, integrated waveguide pulsed laser sources.

Item Type: Article
Funders: Ministry of Education of Malaysia (FRGS/1/2018/STG02/HWUM02/2), Malaysia's Ministry of Education via MyBrainSc scholarship
Uncontrolled Keywords: Monolayer molybdenum disulphide; Saturable absorber; Q-switched laser; Waveguide-based laser
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Jul 2023 02:44
Last Modified: 14 Jul 2023 02:44

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