100-kW ytterbium fiber laser

Gapontsev, Valentin; Fomin, V. V.; Ount, Andrei; Samartsev, I. É.

doi:10.1117/12.347701

Cited by 18 publications

(11 citation statements)

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“…The effect of pulse narrowing (compare the sub-pulse 2b with sub-pulse shown by the red curve) is explained by a strong amplification of the pulse's leading edge by a still "charged" EDF and by the absorption of its trailing edge by a partially "discharged" EDF. This effect has been observed in saturated fiber amplifiers [10,11]. Fig.…”

Section: Resultsmentioning

confidence: 55%

Smart Q-switching for single-pulse generation in an erbium-doped fiber laser

Escalante-Zarate¹,

Barmenkov²,

Kolpakov³

et al. 2012

Opt. Express

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In this paper, we report an active Q-switching of an erbium-doped fiber laser with special modulation functions and novel laser geometry. We experimentally demonstrate that using such a smart Q-switch approach, Q-switch ripple-free pulses with Gaussian-like shape and 17.3 ns width can be easily obtained. The idea behind the smart Q-switch is to suppress one of two laser waves contra-propagating along the fiber cavity, which arises after Q-cell opening, and to eliminate the minor sub-pulses.

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Section: Resultsmentioning

confidence: 55%

Smart Q-switching for single-pulse generation in an erbium-doped fiber laser

Escalante-Zarate¹,

Barmenkov²,

Kolpakov³

et al. 2012

Opt. Express

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show abstract

“…A lot of side-pumping methods have been demonstrated: non-allfibered side-coupling configurations include the prime-fiber coupler, [2] the V-groove side coupling technique, [3] the enhanced evanescent field coupling method, [4] and the embedded mirror method; [5] the monolithic all-fibered coupling systems include the angle polished side coupler, [6] the side grating coupler, [7] the etched silicon capillary side coupler, [8,9] the GT-wave coupler, [10] and the direct fusion side coupler. [11][12][13][14][15][16] The monolithic all-fibered systems are more stable and more efficient than non-all-fibered configurations.…”

Section: Introductionmentioning

confidence: 99%

High coupling efficiency and low signal light loss (2 + 1) × 1 coupler

et al. 2015

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The coupling efficiency of the pump coupler determines the pump light injection capacity of a laser system. Experimental analysis of the influences of different factors on the pump coupling efficiency is in accordance with this conclusion. We use two Nufern fibers (400 μm/440 μm with NA = 0.22) as pump arm, one Nufern fiber (20 μm/400 μm with NA = 0.06/0.46) as a main fiber to make a side-pumping (2+1)× 1 coupler. The experimental result shows that the total output power of this (2+1)× 1 coupler is about 1160 W, corresponding to a coupling efficiency as high as 98.6%. The loss of signal light is less than 1%.

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“…Since their first development and introduction to the commercial market during 1994-1996, those pulsed fiber laser sources found continuously increasing popularity as the lasers of choice for various applications. The previously developed pulsed fiber lasers operates at repetition rate up to 100kHz and higher, with pulse duration from 1ns to 100ns and peak power up to 100kW in the output beam with beam quality parameter M 2 <1.5 [3]. Some of the recently emerged applications needs not only high repetition rate with high peak power and fast rising time for the optical pulses, but absolutely requires diffraction-limited spatial beam profile with small astigmatism and very small pulse-to-pulse energy instability.…”

Section: Introductionmentioning

confidence: 99%

“…That is very challenging task for the standard diode-pumped solid-state lasers available today at the industrial market. High power pulsed fiber lasers are the new class of devices that recently became available for scientific and industrial applications [1][2][3]. Since their first development and introduction to the commercial market during 1994-1996, those pulsed fiber laser sources found continuously increasing popularity as the lasers of choice for various applications.…”

Section: Introductionmentioning

confidence: 99%

Multi-kilowatt peak power pulsed fiber laser with precise computer controlled pulse duration for materials processing

2005

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We have developed pulsed fiber laser with computer controlled pulse duration and multi-kilowatt output peak power in a diffraction-limited beam. The diode laser as a master oscillator and Yb-based fiber amplifiers were used in a MOPFA configuration. The output pulse duration can be arbitrary selected in the range from 4ns to over 200ns with 1ns resolution. Pulse duration does not depend on the repetition rate and remains the same for all operational frequencies in the range from 10kHz to over 140kHz. The short length of the large mode area Yb-doped fiber was used to amplify the generated pulses to over 40kW peak power and several watt of the average power. The output pulse-to-pulse energy instability was less than 1% for all operational frequencies. Due to the single mode design of the delivery fiber, the measured output beam quality M 2 was found to be smaller than 1.05. The developed laser presents a solid-state design to be used in the industrial environment for applications where primary requirements are the beam quality, high repetition rate, small pulse-to-pulse energy instability and reliable laser operation on the real factory floor.

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100-kW ytterbium fiber laser

Cited by 18 publications

References 0 publications

Smart Q-switching for single-pulse generation in an erbium-doped fiber laser

Smart Q-switching for single-pulse generation in an erbium-doped fiber laser

High coupling efficiency and low signal light loss (2 + 1) × 1 coupler

Multi-kilowatt peak power pulsed fiber laser with precise computer controlled pulse duration for materials processing

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