4.1 W All-Fiber Pr-Doped Deep-Red Laser at 717 nm

Zou, Jinhai; Feng, Chunna; Lan, Lan; Wang, Hang; Ruan, Qiujun; Bu, Yikun; Luo, Zhengqian

doi:10.1109/jlt.2023.3307811

Cited by 5 publications

(1 citation statement)

References 39 publications

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“…Currently, the majority of visible fiber lasers leverage rare-earth-doped fluoride fibers (e.g., Pr3+, 24 Ho3+, 25 Dy3+, 26 and Er3+ 27 ) as the efficient gain medium. Over the years, significant progress has been made in achieving wavelength-tunable, 28 – 30 high-power, 31 – 37 Q-switched, 38 – 40 and mode-locked 41 – 46 visible rare-earth-doped fluoride fiber lasers. Although it has been very well demonstrated in the near-infrared, femtosecond mode locking in visible fiber lasers remains extraordinarily challenging and has not yet been reported, except for one related work on 1.6 ps visible fiber oscillator compressed to 168 fs duration outside the oscillator by a grating pair 46 .…”

Section: Introductionmentioning

confidence: 99%

635 nm femtosecond fiber laser oscillator and amplifier

Zou,

Ruan,

Chen

et al. 2024

Adv. Photon. Nexus

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Although visible femtosecond lasers based on nonlinear frequency conversion of Ti:sapphire femtosecond oscillators or near-infrared ultrafast lasers have been well developed, limitations in terms of footprint, cost, and efficiency have called for alternative laser solutions. The fiber femtosecond mode-locked oscillator as an ideal solution has achieved great success in the 0.9 to 3.5 μm infrared wavelengths, but remains an outstanding challenge in the visible spectrum (390 to 780 nm). Here, we tackle this challenge by introducing a visible-wavelength mode-locked femtosecond fiber oscillator along with an amplifier. This fiber femtosecond oscillator emits red light at 635 nm, employs a figure-nine cavity configuration, applies a double-clad Pr 3þ -doped fluoride fiber as the visible gain medium, incorporates a visible-wavelength phase-biased nonlinear amplifying loop mirror (PB-NALM) for mode locking, and utilizes a pair of customized high-efficiency and high-groove-density diffraction gratings for dispersion management. Visible self-starting mode locking established by the PB-NALM directly yields red laser pulses with a minimum pulse duration of 196 fs and a repetition rate of 53.957 MHz from the oscillator. Precise control of the grating pair spacing can switch the pulse state from a dissipative soliton or a stretched-pulse soliton to a conventional soliton. In addition, a chirped-pulse amplification system built alongside the oscillator immensely boosts the laser performance, resulting in an average output power over 1 W, a pulse energy of 19.55 nJ, and a dechirped pulse duration of 230 fs. Our result represents a concrete step toward high-power femtosecond fiber lasers covering the visible spectral region and could have important applications in industrial processing, biomedicine, and scientific research.

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Section: Introductionmentioning

confidence: 99%

635 nm femtosecond fiber laser oscillator and amplifier

Zou,

Ruan,

Chen

et al. 2024

Adv. Photon. Nexus

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Recent progress in visible fluoride fiber lasers

Kifle,

Loiko,

Demaimay

et al. 2024

Fiber Lasers and Glass Photonics: Materials Through Applications IV

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We overview recent advances in visible single-and double-clad fluoride fiber lasers pumped by blue GaN laser diodes. The spectroscopic properties of ZBLAN glasses doped with Pr 3+ , Ho 3+ and Dy 3+ ions are revised. Power scalable efficient continuous-wave visible fluoride fiber lasers emitting in the green, yellow, red and deep-red spectral ranges are presented. Pumped by a single-emitter 6-W 443-nm GaN laser diode, a continuous-wave red double-clad Pr:ZBLAN fiber laser delivered 1.51 W at 634.5 nm with a slope efficiency of 31.0%, a laser threshold of 0.63 W and a spatially single-mode output (M 2 ~1.02). Employing a high-power fiber-coupled laser module, power scalability up to 4.61 W was achieved at the expense of a lower slope efficiency of 22.8% and an increased laser threshold of 1.74 W. Green Ho:ZBLAN (543 nm) and yellow Dy:ZBLAN (575 nm) fiber lasers with high-brightness core pumping at 450 nm are also reported delivering 100 mW-level output with slope efficiencies of 31.2% and 19.6%, respectively, operating on the fundamental mode. A numerical model to predict the visible laser performance is presented and guidelines for further engineering of visible fiber laser sources are given.

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Numerical modeling of Dy³⁺-doped aluminosilicate fiber lasers for yellow light emission

Lee,

Ososkov,

Jackson

2024

Appl. Opt.

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Numerical simulations of Dy3+-doped aluminosilicate fiber lasers for yellow light emission are presented. The 4F9/2→6H13/2 laser transition emitting at approximately 580 nm has been developed experimentally with 445 nm diode pumping and shows promise for higher output power in both silicate and in particular fluoride glass hosts. In this report, we focus on accumulating the published spectroscopic data in order to quantify cross relaxation (CR) in each of these hosts and use it to estimate its role in the laser dynamics. The model involves calculation of the branching ratios, and radiative and nonradiative decay rates and compares well with reported experimental results. We show the important role of the background losses on previous laser performance and the relatively strong increase in the laser threshold as a result of CR despite the moderately low Dy3+ concentrations that have been experimentally tested.

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4.1 W All-Fiber Pr-Doped Deep-Red Laser at 717 nm

Cited by 5 publications

References 39 publications

635 nm femtosecond fiber laser oscillator and amplifier

635 nm femtosecond fiber laser oscillator and amplifier

Recent progress in visible fluoride fiber lasers

Numerical modeling of Dy³⁺-doped aluminosilicate fiber lasers for yellow light emission

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4.1 W All-Fiber Pr-Doped Deep-Red Laser at 717 nm

Cited by 5 publications

References 39 publications

635 nm femtosecond fiber laser oscillator and amplifier

635 nm femtosecond fiber laser oscillator and amplifier

Recent progress in visible fluoride fiber lasers

Numerical modeling of Dy3+-doped aluminosilicate fiber lasers for yellow light emission

Contact Info

Product

Resources

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Numerical modeling of Dy³⁺-doped aluminosilicate fiber lasers for yellow light emission