Watt-level passively Q-switched Tm:YVO4 laser with few-layer WSe2 saturable absorber

Hu, Huawen; Huang, Haizhou; Huang, Jianhong; Deng, Junhong; Weng, Wen Jian; Li, Jinhui; Lin, Wenxiong

doi:10.1016/j.infrared.2020.103554

Cited by 10 publications

(3 citation statements)

References 36 publications

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“…However, to our knowledge, laser emission on the 3 H 4 → 3 H 5 transition in Tm-doped vanadate crystals has not been reported. So far, studies on Tm-doped vanadate (e.g., Tm:YVO 4 [25][26][27][28] , Tm:GdVO 4 [27][28][29] , and Tm:LuVO 4 [27,28] ) lasers have mainly focused on the 3 F 4 → 3 H 6 transition around 1.9 μm. Among the vanadate crystals, the Tm:YVO 4 crystal with natural birefringence is an excellent laser gain medium for 1.9 μm laser due to its large absorption and emission cross sections.…”

Section: Introductionmentioning

confidence: 99%

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Continuous-wave three-wavelength operation of a diode-pumped Tm:YVO4 laser on the 3H4→3H5 and 3F4→3H6 transitions

et al. 2023

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A diode-pumped continuous-wave Tm:YVO 4 laser operating on the 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 transitions was demonstrated for the first time, to the best of our knowledge. An a-cut Tm:YVO 4 crystal with 1.5% (atomic fraction) Tm 3 ion concentration was used to characterize the laser behavior. A common commercial laser diode with a central wavelength of 790 nm and a bandwidth of 3.2 nm was utilized as a pump source. With an output coupler for the 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 transitions, simultaneous three-wavelength laser operation was achieved. The laser emissions at 2292 and 2363 nm in π-polarization and at 2108 nm in σ-polarization were realized. With an incident pump power of 22 W, the total output power of 1.17 W at 2292, 2363, and 2108 nm was obtained. The output power at 2292 and 2363 nm was measured to be 750 mW, and the output power at 2108 nm was measured to be 420 mW.

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Section: Introductionmentioning

confidence: 99%

“…Saito et al demonstrated a roomtemperature 5% Tm:YVO 4 laser obtaining an output power of 48 mW at 1.94 μm with a slope efficiency of 25% [26] . Hu et al reported a 3% Tm:YVO 4 laser producing a maximum CW output power of 2.59 W at 1923.1 nm with a slope efficiency of 41.7% [25] .…”

Section: Introductionmentioning

confidence: 99%

Continuous-wave three-wavelength operation of a diode-pumped Tm:YVO4 laser on the 3H4→3H5 and 3F4→3H6 transitions

et al. 2023

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“…The atoms inside the facets are bonded together by strong chemical bonds, and the layers outside the facets interact with each other due to weak VDW forces, allowing them not only to stack on top of each other, but also to exfoliate them into thin nanosheets, so as to be used in the fabrication of an extensive range of high-performance optoelectronic devices [33][34][35] . As a typical representative of TMDs, Tungsten diselenide (WSe 2 ) has a low thermal conductivity, a higher nonlinear two-photon absorption coefficient (1.9×10 -9 cm/W), and a tunable bandgap that varies with the number of layers (1.2 eV indirect bandgap for bulk materials and 1.65 eV direct bandgap for single-layer structures), thus the response wavelengths can be extended to the mid-infrared spectral region [36][37][38] . Shows potential for use in Q-switched and mode-locked lasers.…”

Section: Introductionmentioning

confidence: 99%

WSe2/BN Heterostructure as the saturable absorber for a diode-pumped passively Q-switched 2 μm solid-state laser

shen,

Gao,

Zhai

et al. 2023

Preprint

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We have successfully achieved the synthesis of heterojunction consisting of WSe2 and BN, by using a liquid phase exfoliation method，and characterization of the prepared materials under the microstructure. The WSe2/BN heterojunction was used as a saturable absorber in the Tm:YAP laser for passively Q-switched operation, and a pulsed laser with an output wavelength around 2 μm range was successfully obtained. After comparing the effects of resonators composed of different cavity mirrors, it is concluded that when the curvature radius of the input mirror is 250mm and the transmittance of the output coupler is 2.5%, the best output performance was obtained, and the output power is 834mW, with a repetition rate of 43.51 kHz and a minimum pulse duration of 1.28 µs, corresponding to a peak power of 14.97 W and a maximum single pulse energy of 19.17 µJ.

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Development of 2 μm all‐solid‐state pulsed laser using a saturable absorber

Zhao

et al. 2023

Micro & Optical Tech Letters

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The pulse laser using a saturable absorber as a passive device has the advantages of narrow pulse width, high repetition rate, and high pulse energy. Low‐dimensional materials have attracted research interest in recent years due to their excellent saturable absorption properties, ultra‐fast carrier response speed, high damage threshold, and so on. This paper gives a brief review of the state‐of‐the‐at 2 µm solid‐state lasers using saturable absorbers. The output performance of lasers in repetition rate, pulse energy, pulse width, and wavelength are summarized. The paper is expected to provide a development direction of novel materials as saturable absorbers in 2 µm solid‐state lasers.

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Watt-level passively Q-switched Tm:YVO4 laser with few-layer WSe2 saturable absorber

Cited by 10 publications

References 36 publications

Continuous-wave three-wavelength operation of a diode-pumped Tm:YVO4 laser on the 3H4→3H5 and 3F4→3H6 transitions

Continuous-wave three-wavelength operation of a diode-pumped Tm:YVO4 laser on the 3H4→3H5 and 3F4→3H6 transitions

WSe2/BN Heterostructure as the saturable absorber for a diode-pumped passively Q-switched 2 μm solid-state laser

Development of 2 μm all‐solid‐state pulsed laser using a saturable absorber

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