An all-fiber, resonantly pumped, gain-switched, 2 μm Tm-doped silica fiber laser

Świderski, Jacek; Maciejewska, Martyna; Kwiatkowski, Jacek; Mamajek, M.

doi:10.1088/1612-2011/10/1/015107

Cited by 33 publications

(21 citation statements)

References 17 publications

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“…The energies gradually increased when the pump pulses were longer and reached ∼136 μJ at 1 μs. Note that the thresholds we achieved here are much higher than those from previous experiments [1,20]. This can be attributed to the fact that we did not include the repetition rate in our simulation.…”

Section: Numerical Results and Discussioncontrasting

confidence: 53%

Temporal characteristics of in-band-pumped gain-switched thulium-doped fiber lasers

Yang

Tang

et al. 2013

J. Opt. Soc. Am. B

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We numerically investigated temporal characteristics of in-band-pumped gain-switched thulim-doped fiber lasers (GSTDFL). Our theoretical model was based on rate equations and optical power propagation equations including both temporal and spatial variations. This model was validated by comparing the numerical results with results from previous experimental work. Due to the lack of a clear definition of the numerical threshold of gain-switched fiber lasers in the literature, we first defined it in our calculations as the status obtained when the variation of the widths of the generated pulses became nonlinear. Then, we used the model to explore the temporal characteristics of such lasers at and above the laser threshold. We found that the threshold pump energy would increase when the pump pulse width was longer than 500 ns and the pulse widths of the laser pulses at the threshold were kept the same at different pump widths. Above the threshold, by calculating the temporal shapes of the laser pulses under different pump conditions, we studied the origin of the trailing spike phenomenon in the in-band-pumped GSTDFLs and determined the parameter space of the pump conditions that could generate the pulses having a Gaussian-like temporal shape and free from the trailing spikes. We further investigated the variation of the laser pulse widths at different laser configurations and discussed their implications. We believe these numerical results can be referenced qualitatively by the design and optimization of the in-band-pumped GSTDFLs and other in-band-pumped gain-switched fiber lasers, such as those with Yb 3 and Ho 3 dopants.

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Section: Numerical Results and Discussioncontrasting

confidence: 53%

Temporal characteristics of in-band-pumped gain-switched thulium-doped fiber lasers

Yang

Tang

et al. 2013

J. Opt. Soc. Am. B

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“…Moreover, with increased pump power the time delay between the pump and signal pulses attributed to the buildup time decreases. This behavior is typical of a gain-switched laser [23][24][25][26]. It should also be noted that, although the input pump pulse has a multipeak shape, the mid-infrared pulses generated by the Dy 3+ :ZBLAN fiber laser have a near-Gaussian shape.…”

Section: Resultsmentioning

confidence: 70%

Gain-switched Dy³⁺:ZBLAN fiber laser operating around 3 μm

et al. 2019

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A gain-switched Dy 3+ -doped ZBLAN fiber laser operating at 2.943 μm is experimentally reported for the first time to the best of our knowledge. The laser was pumped by a 1.1 μm Q-switched ytterbium (III) fiber laser constructed in-house. A stable pulse train is achieved with repetition rates spanning between 25 and 100 kHz. For the repetition rate of 50 kHz, stable 183 ns pulses with an energy of 0.72 μJ and peak power of 4 W are recorded. By using a longer length of Dy 3+ -doped ZBLAN fiber, gain-switched operation was achieved at a wavelength larger than 3 μm.

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“…and holmium (Ho 3? ) co-doped materials [8,9], diode-pumped thulium-doped bulk [10] and fiber lasers [11], holmium lasers pumped by diodepumped thulium lasers [12,13], and hybrid-type lasers [14] are commonly used. It is worth mentioning that supercontinuum (SC) fiber-based generators have also been treated as an attractive source of mid-infrared radiation [15], especially as they can provide over an octave-spanning spectrum of output laser beam with only diffractionlimited quality.…”

Section: Introductionmentioning

confidence: 99%

High repetition rate, Q-switched Ho:YAG laser resonantly pumped by a 20 W linearly polarized Tm: fiber laser

et al. 2013

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We describe an efficient, low-threshold, continuous-wave (CW) and Q-switched operation of a Ho:YAG laser resonantly, single-pass pumped by a 20 W linearly polarized narrow line width Tm: fiber laser at the wavelength of 1,908 nm. At room temperature for an output coupler of 30 % transmission, a maximum continuous-wave output power of 13.3 W for 18.9 W of absorbed pump power was achieved, corresponding to a slope efficiency of 73 %. In a quasi continuous-wave pumping regime, for several output couplers slope efficiencies of almost 82 % were observed. For a Q-switched operation, a Brewster-cut acousto-optic modulator was used. In a CW pumping regime, the pulse repetition frequency (PRF) was changed from 4 to 15 kHz. Under a Q-switched operation, the maximum output power of 12.25 W in relation to 15 kHz PRF was obtained; however, the maximum peak power of almost 250 kW at the PRF of 4 kHz was demonstrated. In the best case, for 4 kHz PRF, pulse energies of 2.18 mJ with a 8.8 ns FWHM pulse width (one of the shortest pulse durations observed in holmium-doped Q-switched lasers) were achieved. The laser operated at the wavelength of 2,090.23 nm with the FWHM line width of 0.95 nm. The beam quality factor of M 2 was measured to be below 1.42 in both X and Y axis.

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An all-fiber, resonantly pumped, gain-switched, 2 μm Tm-doped silica fiber laser

Cited by 33 publications

References 17 publications

Temporal characteristics of in-band-pumped gain-switched thulium-doped fiber lasers

Temporal characteristics of in-band-pumped gain-switched thulium-doped fiber lasers

Gain-switched Dy³⁺:ZBLAN fiber laser operating around 3 μm

High repetition rate, Q-switched Ho:YAG laser resonantly pumped by a 20 W linearly polarized Tm: fiber laser

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An all-fiber, resonantly pumped, gain-switched, 2 μm Tm-doped silica fiber laser

Cited by 33 publications

References 17 publications

Temporal characteristics of in-band-pumped gain-switched thulium-doped fiber lasers

Temporal characteristics of in-band-pumped gain-switched thulium-doped fiber lasers

Gain-switched Dy3+:ZBLAN fiber laser operating around 3 μm

High repetition rate, Q-switched Ho:YAG laser resonantly pumped by a 20 W linearly polarized Tm: fiber laser

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Product

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Gain-switched Dy³⁺:ZBLAN fiber laser operating around 3 μm