1.4  W in-band pumped Dy³⁺-doped gain-switched fiber laser at 3.24  µm

Abstract

In this Letter, we report, to the best of our knowledge, the first demonstration of an in-band pumped gain-switched D y 3 + -doped fiber laser operating at 3.24 µm. The monolithic cavity bounded by two fiber Bragg gratings was pumped by a gain-switched E r 3 + -doped fiber system. It produced stable nanosecond pulses in a single-pulse regime on its entire operating range from 20 kHz to 120 kHz. A record average power of 1.43 W was achieved for a repetition rate of 120 kHz, and a record pulse energy of 19.2 µJ was achieved at 60 kHz. These results represent a significant improvement in D y 3 + -doped pulsed fiber laser performances and open the way to applications in the fields of remote sensing and material processing.

Generation of 2.8 µm fiber laser using an Erbium‐doped ZBLAN double‐clad fiber in a linear‐cavity‐free space experimental setup

“…Pulse fiber lasers could improve the pulse energy and spectral width of the laser. [31][32][33][34][35][36] These characteristics bring advantages to reduce the collateral damage during the medical laser surgery. However, there are challenges in producing MIR fiber laser with fluoride fiber due to the intricacy of the fiber manufacturing process and fragility of the fiber.…”

“…However, the laser performance has limitation on output power and spectral width. Pulse fiber lasers could improve the pulse energy and spectral width of the laser 31–36 . These characteristics bring advantages to reduce the collateral damage during the medical laser surgery.…”

Q-switched Er3+/Dy3+ codoped ZrF4 fiber laser: continuously tunable pulse generation from 3.06 to 3.62 µm

“…Among them, short pulsed rare-earth-doped fiber laser with tunable wavelengths is a competitive option, owing to its potential compactness and robustness (compared to external nonlinear wavelength conversion [9] ), higher peak power than continuous wave (CW), and flexible wavelength. To cover this band, Dy 3 -and Er 3 -doped ZrF 4 fiber lasers operating on the transitions of 6 H 13=2 → 6 H 15=2 and 4 F 9=2 → 4 I 9=2 , respectively, have been developed to be the two most common platforms for realizing short pulses based on Q switching [10][11][12][13] or gain switching [14][15][16] . Despite 10 W CW output from a 2.83 μm pumped all-fiber Dy 3 -doped laser [17] , near-infrared pumping at 1.69 μm has enabled continuous wavelength tuning from 2.71 to 3.42 μm [18] .…”

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

“…[1][2][3] Moreover, they can also be used as pump sources to obtain longer wavelength mid-infrared lasers, such as Fe 2+ -and Dy 3+ -doped lasers and optical parameter oscillator (OPO) lasers. [4][5][6][7] Especially for Q-switched lasers with pulse durations of ns level, which possess much advantages in the field of laser surgery and OPO due to their narrow pulse widths and high peak power.…”