Mode-locked all-fiber lasers at both anomalous and normal dispersion regimes based on spin-coated MoS2 nano-sheets on a side-polished fiber

Reza Khazaeinezhad, Sahar Hosseinzadeh Kassani, Hwanseong Jeong, Tavakol Nazari, Dong Il Yeom, Kyunghwan Oh

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We demonstrate an all-fiberized mode-locked laser by employing Molybdenum Disulfide (MoS2) spin-coated onto a side-polished fiber (SPF) as an in-line saturable absorber. Single crystal MoS2 has been exfoliated via the Li intercalation method and then dispersed with large population of few-layer MoS2 nano-sheets in ethanol. Subsequently, a saturable absorber has been prepared using a relatively simple method: spin-coating the uniform MoS2 solution on the fabricated SPF without using any polymer or toxic procedure. Power-dependent transmission property of the prepared MoS2 nano-sheets on the SPF was experimentally analyzed, providing the feasibility to apply it as an efficient in-line saturable absorption behavior. By deploying the MoS2 SPF into a fiber laser cavity with finely tuned laser pump power and cavity dispersion, mode-locked pulses were obtained at anomalous and normal dispersion of the laser cavity. The self-started soliton pulses at the anomalous dispersion regime were generated with a spectral bandwidth of 9.96 nm at 1584 nm and a pulse duration of 521 fs. Moreover, by managing the dispersion to the normal regime, stable pulses at net-normal intra-cavity dispersion with 11.9 ps pulse duration were obtained with a spectral bandwidth of 18.2 nm at 1570 nm. The results prove the effectiveness of developing MoS2 saturable absorbers and applications for pulsed laser operation.

Original languageEnglish
Article number6987219
JournalIEEE Photonics Journal
Volume7
Issue number1
DOIs
Publication statusPublished - 2015 Feb 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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