Ultrafast erbium-doped fiber laser mode-locked by a CVD-grown molybdenum disulfide (MoS_2) saturable absorber

TLDR

We demonstrate an erbium‑doped fiber laser passively mode‑locked by a multilayer molybdenum disulfide (MoS₂) saturable absorber. The multilayer MoS₂ saturable absorber is fabricated via chemical vapor deposition and transferred onto the end‑face of a fiber connector to enable passive mode locking. Stable mode locking is achieved at a 31 mW pump threshold, producing soliton pulses at 1568.9 nm with 2.6 nm bandwidth, 1.28 ps duration, and 8.288 MHz repetition rate, demonstrating multilayer MoS₂ as a promising ultrafast laser material.

Abstract

We demonstrate an erbium-doped fiber laser passively mode-locked by a multilayer molybdenum disulfide (MoS(2)) saturable absorber (SA). The multilayer MoS(2) is prepared by the chemical vapor deposition (CVD) method and transferred onto the end-face of a fiber connector. Taking advantage of the excellent saturable absorption of the fabricated MoS(2)-based SA, stable mode locking is obtained at a pump threshold of 31 mW. Resultant output soliton pulses have central wavelength, spectral width, pulse duration, and repetition rate of 1568.9 nm, 2.6 nm, 1.28 ps, and 8.288 MHz, respectively. The experimental results show that multilayer MoS(2) is a promising material for ultrafast laser systems.