Dual-loss-modulated Q-switched Tm:LuAG laser with AOM and monolayer graphene

Chen, Luan; Yang, Ke; Zhao, Jia; Zhao, Shengzhi; Qiao, Wenchao; Li, Tao; Feng, Tianli; Liu, Cheng; Qiao, Jun; Liang, Zheng; Xu, Jun; Wang, Qing Guo; Su, Liang

doi:10.1364/ao.54.008024

Cited by 13 publications

(5 citation statements)

References 27 publications

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“…The maximum pulse energy of 128 mJ was obtained at a repetition rate of 10 Hz, corresponding to a minimum pulse width of 160 ns [27], which was the largest pulse energy for AO Q-switched 2 μm laser. In 2015, Luan et al realized a 790 nm diode-pumped doubly Q-switched Tm:LuAG laser simultaneously with AO modulator and multilayered graphene as Q-switches, from which a minimum pulse width of 170 ns with a corresponding pulse energy of 0.53 mJ was obtained at a repetition rate of 1 kHz [28]. The results well indicated that doubly Q-switching technique could efficiently shorten the pulse duration.…”

Section: Flash-pumped 2 Micron Solid-state Pulsed Lasersmentioning

confidence: 97%

“…The obtained maximum average output power, pulse repetition rate, and single pulse energy were 38 mW, 27.9 kHz, and 1.74 μJ, respectively. Since then, graphene has been widely applied in many kinds of Tm − doped crystals based 2 μm lasers, such as Tm:LSO, Tm:YAP, Tm:LuAG, Tm,Y:CaF 2, and et al [28,[51][52][53]. Another kind of 2D material, TMDs, has also been widely studied in recent years.…”

Section: Diode-pumped Sas Modulated 2 Micron Solid-state Lasers 41 Two-dimensional Nanomaterials Modulated 2 Micron Solid-state Lasersmentioning

confidence: 99%

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Q-Switched 2 Micron Solid-State Lasers and Their Applications

Yang¹,

Yang²,

He³

et al. 2021

Nonlinear Optics - From Solitons to Similaritons

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In this chapter, we overview the Q-switched 2 μm solid-state laser development achieved in recent years, including flash- and diode-pumped solid-state lasers based on active and passive modulators. In summary, active Q-switching is still the first choice for obtaining large pulse energy at 2 μm currently, while passive Q-switching based on saturable absorbers (SAs), especially the newly emerging broadband low-dimension nanomaterial, is becoming promising approach in generating Q-switched 2 μm lasers specially with high repetition rate, although the output power, pulse duration, and pulse energy needs further enhancement. Besides, some important applications of 2 μm lasers, such as medicine, laser radar, and infrared directional interference, have also been introduced in brief.

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Section: Flash-pumped 2 Micron Solid-state Pulsed Lasersmentioning

confidence: 97%

Section: Diode-pumped Sas Modulated 2 Micron Solid-state Lasers 41 Two-dimensional Nanomaterials Modulated 2 Micron Solid-state Lasersmentioning

confidence: 99%

Q-Switched 2 Micron Solid-State Lasers and Their Applications

Yang¹,

Yang²,

He³

et al. 2021

Nonlinear Optics - From Solitons to Similaritons

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“…In addition to Nd 3+ -based laser materials, the Tm 3+ -doped gain materials have been tested for 1.8 µm laser generation. In fact, Tm 3+ -doped bulk crystals are broadly used to generate a 1.9~2 µm laser by the transitions from 3 F 4 to 3 H 6 with the advantages of broad emission spectrum and high Stokes efficiency [15][16][17]. As we all know, the gain spectrum is located at 1.9~2 µm for the free-running Tm 3+ -doped lasers due to the re-absorption effect [18].…”

Section: Introductionmentioning

confidence: 99%

High-Power Acoustic-Optical Q-Switched 1.83 µm Tm-Doped Bulk Laser

Guo

et al. 2023

Photonics

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We report on a high-power acoustic-optical (AO) Q-switched Tm:YLF laser operating at ~1.83 μm by controlling the transmittance of the output coupler. Under the continuous-wave (CW) operation, the maximum output power of 13 W is achieved, and the slope efficiency is up to 32.7%. With a YAG etalon inserted into the cavity, the linewidth is compressed below 0.5 nm with a maximum output power of 12.2 W. In the Q-switched state, the maximum pulsed output power of 10.32 W is achieved with a pulse duration of 150 ns when the repetition rate is 15 kHz. And the maximum pulsed energy of 1.13 mJ is generated with a duration of 131 ns at 5 kHz. As far as we know, this is the highest output power reported for the CW and pulsed 1.83 μm laser. In addition, the relationship between the output wavelength and crystal length is theoretically analyzed, which shows that increasing the loss of 1880 nm is the key to high-power 1.83 μm laser output.

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“…Up to now, various Tm 3+ ion-doped crystals (YAP, YAG, LuAG, YLF, etc.) have been widely investigated to achieve a 2-micrometer pulsed laser based on the Q-switching technique [ 2 , 3 , 4 ]. As a typical representative, Tm:YLF, a natural birefringent crystal with a linearly polarized output, has been used to achieve as high as 87.5 W of CW laser output power at 1907.8 nm [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Study of an Actively Q-Switched Tm:YLF Laser with an Acousto-Optic Modulator

et al. 2021

Self Cite

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We report the characteristics of a diode-end-pumped, high-repetition-rate, acoustic-optic (AO) Q-switched Tm:YLF laser operating from 5 kHz to 10 kHz. In the continuous-wave (CW) regime, a maximum average output power of 8.5 W was obtained with a slope efficiency of 30.7%. Under the AO Q-switching regime, a maximum output power of 7.32 W was obtained at a repetition frequency of 5 kHz with a pulse width of 68 ns and a pulse energy of 1.4 mJ, corresponding to a peak power of 21.5 kW. A time-dependent rate equation model is introduced to theoretically analyze the results obtained in the experiment, in which the cross-relaxation phenomenon, upconversion losses and ground-state depletion are taken into account. Additionally, the evolution processes of population inversion density and intracavity photon number density with time are also presented. The theoretical results well predict the dependence of laser output characteristics of Tm:YLF crystal on the incident pump powers.

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Dual-loss-modulated Q-switched Tm:LuAG laser with AOM and monolayer graphene

Cited by 13 publications

References 27 publications

Q-Switched 2 Micron Solid-State Lasers and Their Applications

Q-Switched 2 Micron Solid-State Lasers and Their Applications

High-Power Acoustic-Optical Q-Switched 1.83 µm Tm-Doped Bulk Laser

Experimental and Theoretical Study of an Actively Q-Switched Tm:YLF Laser with an Acousto-Optic Modulator

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