Passively Q-switched S-band thulium fluoride fiberlaser with multi-walled carbon nanotube

Abstract

A stable, passively Q-switched thulium fluoride fiber laser (TFFL) using a multi-walled carbon nanotube (MWCNT)-based saturable absorber (SA) for operation in the S-band region is proposed and demonstrated. The proposed TFFL has a central lasing wavelength of 1486.4 nm and an input power range of 87.1-126.6 mW. The output pulses have a repetition rate and pulse width range of 30.1-40.0 kHz and 9.0-3.2 μs, respectively, with a maximum pulse energy of 28.9 nJ. This is the first time, to the author's knowledge, of the successful demonstration of a passively Q-switched S-band TFFL using an MWCNT-based SA.

Quasi-2D Mn3Si2Te6 Nanosheet for Ultrafast Photonics

“…The passive Q-switching technique is one of the most effective methods to generate pulsed lasers [ 6 , 7 , 8 , 9 ]. By applying the Q-switched mechanism, short pulses can be achieved with durations of microseconds (μs) or nanoseconds (ns) and a low repetition rate of kilohertz (kHz) [ 10 , 11 ]. In this technique, the saturable absorbers (SAs) are essential components of fiber laser systems for modulating intracavity loss and generating short pulses [ 12 ].…”

Highly Stable Passively Q-Switched Erbium-Doped All-Fiber Laser Based on Niobium Diselenide Saturable Absorber

“…It compresses the laser energy into extremely narrow pulses for emission, so that the peak power of the light source can be increased by several orders of magnitude. The Q-switching mechanism mainly involves the generation of short pulses, whose pulse duration can reach the order of microseconds (µs), nanoseconds (ns), and even picoseconds (ps), while the repetition frequency can range from several Hz to hundreds of kilohertz (kHz) [5,6]. Passive Q-switching technology based on SAs has been a popular way to achieve pulsed lasers due to its advantages of compactness, high efficiency, and low cost [7][8][9].…”