Compact repetitively Q-switched Yb:YCa4O(BO3)3 laser with an acousto-optic modulator

Chen, Xiaowen; Xu, Honghao; Han, Wenjuan; Yi, Hongying; Yu, Haohai; Zhang, Huaijin; Liu, Junhai

doi:10.1016/j.optlastec.2015.02.002

Cited by 20 publications

(3 citation statements)

References 10 publications

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“…For attaining active Q-switching and mode-locking operations, an electro-optic/acousto-optic modulator is generally used [21][22][23]. However, due to significant drawbacks such as slow response time, complicated synchronization process, high cost, and bulk size, these devices are limited in flexibility and applicability.…”

Section: Introductionmentioning

confidence: 99%

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

et al. 2020

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In-plane anisotropic two-dimensional (2D) materials have gained considerable interest in the field of research, due to having the potential of being used in different device applications. Recently, among these 2D materials, group 10 transition metal dichalcogenides (TMDs) pentagonal Palladium diselenide (PdSe2) is utilized in various sections of researches like nanoelectronics, thermoelectric, spintronics, optoelectronics, and ultrafast photonics, owing to its high air stability and broad absorption spectrum properties. In this paper, it is demonstrated that by utilizing this novel 2D layered PdSe2 material as a saturable absorber (SA) in an EDF laser system, it is possible to obtain switchable laser pulse generation modes. At first, the Q-switching operation mode is attained at a threshold pump power of 56.8 mW at 1564 nm, where the modulation range of pulse duration and repetition rate is 18.5 μs–2.0 μs and 16.4 kHz–57.0 kHz, respectively. Afterward, the laser pulse generation mode is switched to the mode-locked state at a pump power of 63.1 mW (threshold value) by changing the polarization condition inside the laser cavity, and this phenomenon persists until the maximum pump power of 230.4 mW. For this mode-locking operation, the achieved pulse duration is 766 fs, corresponding to the central wavelength and 3 dB bandwidth of 1566 nm and 4.16 nm, respectively. Finally, it is illustrated that PdSe2 exhibits a modulation depth of 7.01%, which substantiates the high nonlinearity of the material. To the best of the authors’ knowledge, this is the first time of switchable modes for laser pulse generation are achieved by using this PdSe2 SA. Therefore, this work will encourage the research community to carry out further studies with this PdSe2 material in the future.

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Section: Introductionmentioning

confidence: 99%

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

et al. 2020

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“…One of the most attractive applications of these Yb-ion doped oxyborates is to make high-energy Q-switched lasers by taking advantage of their long fluorescence lifetime and small stimulated emission cross-section (2.2-2.5 ms and 0.46-0.55 × 10 −20 cm 2 for Yb:YCOB and Yb:GdCOB [5,6]). Many investigations have been carried out regarding the active Q-switching and passive Q-switching laser performance of Yb:YCOB or Yb:GdCOB [7][8][9][10][11][12][13][14][15][16][17][18][19][20], revealing their superiority to other Yb-ion crystals in the generation of high-energy laser pulses [8-12, 15, 16]. It is therefore of interest and relevance to investigate the Q-switching laser properties of the Yb:LaCOB crystal, which, up to now, still remain unknown.…”

Section: Introductionmentioning

confidence: 99%

Passively Q-switched laser action of Yb:LaCa₄O(BO₃)₃ crystal

Dong

et al. 2019

Laser Phys.

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We report on the passive Q-switching laser performance of Yb:LaCa 4 O(BO 3 ) 3 crystal with Cr 4+ :YAG or two-dimensional (2D) MoS 2 acting as a saturable absorber. With Cr 4+ :YAG, a pulsed output power of 3.8 W was produced at 71 kHz with a slope efficiency of 49%, whereas at a lower repetition rate, the average pulse energy achieved could reach 250 µJ; the shortest duration and peak power were respectively 17 ns and 14.7 kW. For passive Q-switching with 2D MoS 2 , 1.61 W of pulsed output power was achieved at 395 kHz; the resulting pulse energy, duration, and peak power were 4.1 µJ, 220 ns, and 18.6 W, respectively.

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“…Both Q-switching and modelocking can be generated through active or passive means. In the early years, active Q-switching and mode-locking were intensely investigated with the use of acousto-optic [11][12][13] or electro-optic modulators [14,15]. However, while providing significant control over the output pulses, the approach did have certain drawbacks, which limited its applications, including some bulky components and electronics that increased the complexity of the system and became a barrier for a portable and robust system design.…”

Section: Introductionmentioning

confidence: 99%

Passively Q-switched and mode-locked erbium doped fiber laser based on N-doped graphene saturable absorber

Ahmad¹,

Aidit²,

Ooi³

et al. 2017

Laser Phys.

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A passively Q-switched and mode-locked erbium-doped fiber laser based on a nitrogen-doped graphene saturable absorber is demonstrated. The N-doped graphene based saturable absorber has a modulation depth of 37.88% and a saturation intensity of 0.016 73 MW cm −2 . By integrating the N-doped graphene saturable absorber into the laser cavity, a stable Q-switched operation with a centre wavelength of 1561.1 nm is obtained with a pulse energy of up to 29.0 nJ. As the pump power increases, the Q-switching operation transits into a mode-locking operation. The mode-locking operation is achieved with a centre wavelength of 1560 nm, a pulse width of 0.98 ps, a repetition rate of 28.5 MHz and a signal to noise ratio of up to 40 dB in the RF spectrum.

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Compact repetitively Q-switched Yb:YCa4O(BO3)3 laser with an acousto-optic modulator

Cited by 20 publications

References 10 publications

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

Passively Q-switched laser action of Yb:LaCa₄O(BO₃)₃ crystal

Passively Q-switched and mode-locked erbium doped fiber laser based on N-doped graphene saturable absorber

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Compact repetitively Q-switched Yb:YCa4O(BO3)3 laser with an acousto-optic modulator

Cited by 20 publications

References 10 publications

Utilization of group 10 2D TMDs-PdSe2 as a nonlinear optical material for obtaining switchable laser pulse generation modes

Utilization of group 10 2D TMDs-PdSe2 as a nonlinear optical material for obtaining switchable laser pulse generation modes

Passively Q-switched laser action of Yb:LaCa4O(BO3)3 crystal

Passively Q-switched and mode-locked erbium doped fiber laser based on N-doped graphene saturable absorber

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Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

Passively Q-switched laser action of Yb:LaCa₄O(BO₃)₃ crystal