Passively Mode-Locked 1.93-㎛ All-Fiberized Femtosecond MOPA Laser Using a Gold-Deposited Side-Polished Fiber

정민완,; 구준회,; 이주한,

doi:10.3807/kjop.2014.25.6.340

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2023

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“…Pulsed lasers of nearly 2 μm have played an important role in industrial, military, and scientific research fields. − As an effective means to obtain a pulsed laser, passively Q-switched (PQS) technology has the advantages of simple structure, easy operation, and low cost. A high-quality saturable absorber (SA) is the key component for PQS.…”

Section: Introductionmentioning

confidence: 99%

Infrared Saturable Absorption Properties of Tungstenene Nanosheets for Passively Q-Switched 1.9 μm Solid-State Laser

Zhao,

Wang,

Liu

et al. 2023

ACS Appl. Nano Mater.

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Tungsten is a transition-metal element that belongs to the VIB group and is one of the 90 naturally occurring elements. In this paper, we prepared tungstenene nanosheets by liquid-phase exfoliation and first demonstrated their nonlinear saturable absorption properties at a 2 μm waveband. The high-performance 1.9 μm passively Q-switched lasers were realized with tungstenene as a saturable absorber, which exhibited the advantages of high repetition rate, short pulse width, and high peak power. Under a pulse pumping mode with a repetition rate of 10 Hz, the single-pulse energy and peak power reached 87.96 μJ and 605.81 W, respectively, which are superior to all two-dimensional (2D) saturable absorbers reported before. These results have shown that tungstenene can be used as a high-quality optical modulator for a 2 μm laser.

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