150 W high-average-power, single-frequency nanosecond fiber laser in strictly all-fiber format

Su, Rongtao; Zhang, Pu; Hu, Xiao; Wang, Xiaolin; Xu, Xiaojun

doi:10.1364/ao.51.003655

Cited by 30 publications

(10 citation statements)

References 16 publications

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“…The peak power of the ns pulses can be calculated as [21] where is the normalized intensity of the ns pulses, and is pulse period. is the average power, and is the repetition frequency.…”

Section: Resultsmentioning

confidence: 99%

Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

Huang

Meng

et al. 2018

High Pow Laser Sci Eng

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An all-fiberized high-average-power narrow linewidth ns pulsed laser with linear polarization is demonstrated. The laser system utilizes a typical master oscillator power amplifier (MOPA) configuration. The stimulated Brillouin scattering (SBS) is effectively suppressed due to the short fiber length and large mode area in the main amplifier, combined with the narrow pulse duration smaller than the phonon lifetime of SBS effect. A maximal output power of 466 W is obtained with a narrow linewidth of ∼203.6 MHz, and the corresponding slope efficiency is ∼80.3%. The pulse duration is condensed to be ∼4 ns after the amplification, corresponding to the peak power of 8.8 kW and the pulse energy of 46.6 µJ. Neardiffraction-limited beam quality with an M 2 factor of 1.32 is obtained at the output power of 442 W and the mode instability (MI) is observed at the maximal output power. To the best of our knowledge, this is the highest average output power of the all-fiberized narrow linewidth ns pulsed fiber laser with linear polarization and high beam quality, which is a promising source for the nonlinear frequency conversion, laser lidar, and so on.

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“…The peak power of the ns pulses can be calculated as [21] where is the normalized intensity of the ns pulses, and is pulse period. is the average power, and is the repetition frequency.…”

Section: Resultsmentioning

confidence: 99%

Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

Huang

Meng

et al. 2018

High Pow Laser Sci Eng

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“…Fang et al [18] and Liu et al [1] have demonstrated narrow-linewidth pulses by employing a fiber pigtailed intensity modulator. Since it is difficult to obtain high power narrow-linewidth pulses directly from an oscillator, a master oscillator power amplifier (MOPA) structure was always employed [1,[16][17][18][19] . Zhu et al have obtained ∼80 ns pulses with pulse energy of 220 µJ and repetition rate of 20 kHz from an all-fiber MPOA [16] , and Fang et al generated 15 ns pulses with peak/average power of 33 kW/2.5 W [18] .…”

Section: Introductionmentioning

confidence: 99%

“…[1] have demonstrated narrow-linewidth pulses by employing a fiber pigtailed intensity modulator. Since it is difficult to obtain high power narrow-linewidth pulses directly from an oscillator, a master oscillator power amplifier (MOPA) structure was always employed [1, 16–19] . Zhu et al.…”

Section: Introductionmentioning

confidence: 99%

Kilowatt high average power narrow-linewidth nanosecond all-fiber laser

Su¹,

Zhang²,

Wang³

et al. 2014

High Pow Laser Sci Eng

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A high power narrow-linewidth nanosecond all-fiber laser based on the master oscillator power amplifier (MOPA) configuration is demonstrated. A pulsed seed with high repetition rate of 10 MHz was generated by modulating a continuous-wave (CW) single-frequency fiber laser at ∼1064 nm by using an electro-optic intensity modulator (EOIM). After multi-stage cascaded power amplification, the average power was boosted to be kilowatt level. The pulses from the main amplifier had a pulse width of ∼3 ns and an average/peak power of 913 W/28.6 kW. Further power scaling of the pulses was limited by stimulated Raman scattering (SRS) for the moment, method for SRS suppression and further power scaling was briefly discussed.

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“…The pulse series can also be modulated as macro-micro pulses, which are widely used in guide star systems [1,3]. Su et al [11] reported an all-fiber 1064 nm laser that has over 100 W output with about a 8 ns pulse duration and a 20 MHz repetition rate. The system used a single-frequency CW laser as the master oscillator (MO).…”

Section: Introductionmentioning

confidence: 99%

Fiber-solid, hybrid, single-frequency laser (100 W) with a 100 MHz repetition rate and 1 ns pulse width from a spherical aberration compensated four-stage Nd:YVO₄ amplifier

et al. 2014

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A pulsed laser for laser guide stars with a 100 MHz repetition rate and 1 ns pulse width was achieved by external modulation of a continuous wave (CW) laser with a 70 kHz spectrum width. The laser is amplified first by two fiber pre-amplifiers and then by four solid-state power amplifiers. The laser achieves gains as high as 36 dB in the fiber pre-amplifiers due to the long gain medium length. The output power from the fiber amplifiers is 2.1 W. The laser receives further amplification in the solid-state amplifiers and retains good beam quality by aberration compensation. The final output average power is 102.9 W, and the beam quality factor M² is 1.46. The laser reaches high power without spectrum width and pulse width broadening at the 100 MHz repetition rate. The spectrum width of the pulsed laser is less than 0.8 GHz, which is close to the Fourier transform limit. Such a laser with single-frequency, high-repetition, and high-power features along with good beam quality will be valuable for many research areas.

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150 W high-average-power, single-frequency nanosecond fiber laser in strictly all-fiber format

Cited by 30 publications

References 16 publications

Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

Kilowatt high average power narrow-linewidth nanosecond all-fiber laser

Fiber-solid, hybrid, single-frequency laser (100 W) with a 100 MHz repetition rate and 1 ns pulse width from a spherical aberration compensated four-stage Nd:YVO₄ amplifier

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150 W high-average-power, single-frequency nanosecond fiber laser in strictly all-fiber format

Cited by 30 publications

References 16 publications

Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

Kilowatt high average power narrow-linewidth nanosecond all-fiber laser

Fiber-solid, hybrid, single-frequency laser (100 W) with a 100 MHz repetition rate and 1 ns pulse width from a spherical aberration compensated four-stage Nd:YVO4 amplifier

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Product

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About

Fiber-solid, hybrid, single-frequency laser (100 W) with a 100 MHz repetition rate and 1 ns pulse width from a spherical aberration compensated four-stage Nd:YVO₄ amplifier