Tapered fiber amplifier with high gain and output power

Kerttula, Juho; Филиппов, В. Н.; Chamorovskii, Yuri; Ustimchik, V.; Golant, K. M.; Okhotnikov, O. G.

doi:10.1134/s1054660x12110059

Cited by 26 publications

(19 citation statements)

References 21 publications

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“…The T-DCF is a fiber with longitudinal geometrical profile allowed support of fundamental mode propagation from a narrow part to a wide part of the fiber. The T-DCF fiber has several advantages: (1) increased pump absorption due to the efficient mode mixing, (2) possibility to use cost-effective, low brightness 10 and high power multimode source as a pump 9 . The fundamental properties of T-DCF were extensively studied experimentally and theoretically in the past, and details can be found elsewhere 11 – 13 .…”

Section: Introductionmentioning

confidence: 99%

Picosecond Yb-doped tapered fiber laser system with 1.26 MW peak power and 200 W average output power

Petrov

Odnoblyudov

Gumenyuk

et al. 2020

Sci Rep

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We demonstrate a compact picosecond master-oscillator power-amplifier (MOPA) system based on an Yb-doped polarization-maintaining double-clad tapered fiber (T-DCF) delivering pulses with over 1.26 MW peak power and average output power up to 200 W preserving near diffraction limited beam quality. The unique properties of an active tapered fiber enable to amplify the seed pulses directly with no need for applying of additional stretching technique. This simplified laser system can find the practical implementation in industrial micromachining.

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Section: Introductionmentioning

confidence: 99%

Picosecond Yb-doped tapered fiber laser system with 1.26 MW peak power and 200 W average output power

Petrov

Odnoblyudov

Gumenyuk

et al. 2020

Sci Rep

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“…Moreover, the degree of polarization is preserved in a tapered fiber, which makes it easy to control the output polarization state [25]. Finally, exploiting tapered fibers allows maintain a high gain in a high-power amplifier [26]. This is facilitated by vignetting, a natural mechanism of amplified spontaneous emission suppression owing to tapered fiber geometry.…”

Section: B Tapered Fiber Amplifiermentioning

confidence: 98%

“…This is facilitated by vignetting, a natural mechanism of amplified spontaneous emission suppression owing to tapered fiber geometry. To increase double clad absorption, the fiber was four times truncated similarly as described in [24] and [26]. The clad and core diameters of the Yb-doped tapered fiber were 770 um and 45 um at the wide end of the fiber, and 170 and 10 um at the narrow end of the fiber, respectively.…”

Section: B Tapered Fiber Amplifiermentioning

confidence: 99%

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193-GHz 53-W Subpicosecond Pulse Source

Saarinen

Филиппов

Chamorovskiy

et al. 2015

IEEE Photon. Technol. Lett.

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We present a light source that can generate a pulse train with an extremely high repetition rate, tens of watts of average output power, and a low-divergence output beam. This unique combination of system characteristics is achieved with single-stage amplification of a passively harmonically mode-locked semiconductor disk laser in a tapered Yb-doped double-clad fiber. With the short-length tapered fiber amplifier an amplification factor >17 dB is reached, while preserving the 930-fs pulse duration of the semiconductor disk laser. The demonstrated pulse source with a beam quality factor <2 enables efficient coupling into single-mode fibers for nonlinear optical experiments and ultracoarse frequency comb generation.

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“…However, all of the systems in Refs. [9][10][11][12][13] were constructed based on the bulk optical component, which lack stability and compactness. Comparatively speaking, the all-fiberized structure has better performance in stability, compactness, thermal management and so on.…”

Section: Introductionmentioning

confidence: 99%

kW-class high power fiber laser enabled by active long tapered fiber

Shi

Zhang

Wang

et al. 2018

High Pow Laser Sci Eng

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Compared with traditional uniform fibers, tapered fiber has numerous unique advantages, such as larger mode area, higher pump absorption, suppression to nonlinear effects, and maintaining good beam quality. In this manuscript, we have constructed an all-fiberized fiber amplifier which is based on a piece of ytterbium-doped tapered double-clad fiber (T-DCF). The fiber amplifier is operated under continuous wave (CW) regime at 1080 nm wavelength. The $M^{2}$ factor of the amplifier at 1.39 kW output power is ${\sim}1.8$. The maximum output power of the system reached 1.47 kW, which, to the best of our knowledge, is the highest output power of long tapered fiber based fiber laser system. Our result successfully verifies the potential of power scalability and all-fiberized capability of long tapered fiber, and the performance of our system can be further enhanced by fiber design optimization.

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Tapered fiber amplifier with high gain and output power

Cited by 26 publications

References 21 publications

Picosecond Yb-doped tapered fiber laser system with 1.26 MW peak power and 200 W average output power

Picosecond Yb-doped tapered fiber laser system with 1.26 MW peak power and 200 W average output power

193-GHz 53-W Subpicosecond Pulse Source

kW-class high power fiber laser enabled by active long tapered fiber

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