5kW High peak power, 0.2mJ high pulse energy, linearly-polarized pulsed laser from a single all-fiber oscillator

Shi, Chen; Huang, Long; Wang, Xiaolin; Zhang, Pu

doi:10.1016/j.optlastec.2015.06.017

Cited by 3 publications

(3 citation statements)

References 20 publications

(15 reference statements)

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“…Dissipative losses for the pump and signal wavelengths were θ p = 1.2 × 10 −4 cm −1 and θ s = 0.23 × 10 −4 cm −1 , accordingly at low light intensity. The active ion concentration was calculated from the measured absorption of a weak signal at a wavelength of 793 nm, introduced into the cladding, as in [26]. The resulting concentration was obtained as N = 3 × 10 20 cm −3 .…”

Section: Methodsmentioning

confidence: 99%

“…Typically, the output power of actively Q-switched fiber lasers is limited by the power density that the optical modulators can handle. The highest peak power and energy of an all-fiber laser of 5 kW and 0.2 mJ with a 20 kHz repetition rate was obtained in a linearly polarized ytterbium-doped fiber laser at a wavelength of 1064 nm [26]. A recent paper [27] presents a broad review and the current state of research on the actively Q-switched all-fiber lasers.…”

Section: Introductionmentioning

confidence: 99%

“…k ratio of rate constants of ETU and CR 1 processes Γ s overlap parameter, which reduces the gain in fiber core[26] γ s ratio of absorption and emission cross sections at the signal wave-length…”

mentioning

confidence: 99%

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The Dynamics of Multi-Peak Pulsed Generation in a Q-Switched Thulium-Doped Fiber Laser

et al. 2022

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We demonstrate a detailed theoretical and experimental study of a thulium-doped fiber laser being Q-switched by means of an acousto-optic modulator. The processes leading to the generation of discontinuous multi-peak pulses with an energy of up to 5 μJ and a nanosecond structure are described. The dynamics of the multi-peak structure’s evolution is demonstrated and a method of switching to a single-pulse mode is proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Dynamics of Multi-Peak Pulsed Generation in a Q-Switched Thulium-Doped Fiber Laser

et al. 2022

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Controllable multi-stable-state operation in an AOM actively Q-switched all-fiber laser system

Chen¹,

Wang²,

He³

et al. 2023

Opt. Express

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This paper presents a comprehensive experimental study of multi-stable-state output characteristics in an all-fiber laser with an acoustic-optical modulator (AOM) as the Q-switcher. For the first time, in this structure, the partitioning of the pulsed output characteristics is explored, dividing the operating status of the laser system into four zones. The output characteristics, the application prospects, and the parameter setting rules for working in stable zones are presented. In the second stable zone, a peak power of 4.68 kW with 24 ns was obtained at 10 kHz. This is the narrowest pulse duration achieved with an AOM actively Q-switched all-fiber linear structure. The pulse narrowing is attributed to the rapid release of signal power and pulse tail truncated by AOM shutdown.

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High repetition frequency tunability active Q-switched all-fiber laser by multi-gain sub-rings smoothing multipeak pulse and suppressing ASE self-saturation

Chen,

Wang,

et al. 2024

Opt. Express

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This paper provides a method to effectively suppress the severe ASE self-saturation when achieving high repetition frequency tunability with high output power and narrow pulse width in active Q-switched all-fiber lasers. By studying the regularity of the system's multi-stable state, we first ensured that the laser system operated in a steady state. Then output avoids uneven distribution of pulse energy or missing pulses due to period bifurcation state or chaos state. By adding multiple gain sub-rings within the cavity, the sub-ring structure itself indirectly mitigates the ASE self-saturation while smoothing the pulse. The method will avoid the severe power loss caused by traditional smoothing methods by adjusting the AOM rising edge time. It will also avoid lowering the ASE lasing threshold at high repetition frequency. Meanwhile, the intra-cavity backward ASE can be effectively absorbed by inserting the gain fiber in the sub-rings to directly mitigate the ASE self-saturation. The system's continuously adjustable repetition frequency can be as high as over 300 kHz. It ensures that output power above the watt level and a < 0.2 nm narrow bandwidth can be maintained while tuning the repetition frequency. The narrowest smoothing pulse width of 28 ns has been reached.

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5kW High peak power, 0.2mJ high pulse energy, linearly-polarized pulsed laser from a single all-fiber oscillator

Cited by 3 publications

References 20 publications

The Dynamics of Multi-Peak Pulsed Generation in a Q-Switched Thulium-Doped Fiber Laser

The Dynamics of Multi-Peak Pulsed Generation in a Q-Switched Thulium-Doped Fiber Laser

Controllable multi-stable-state operation in an AOM actively Q-switched all-fiber laser system

High repetition frequency tunability active Q-switched all-fiber laser by multi-gain sub-rings smoothing multipeak pulse and suppressing ASE self-saturation

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