100–300 Hz repetition-rate acousto-optic Q-switched 2.79 μm Er:YSGG laser side-pumped by laser-diode

Cui, Qingzhe; Ma, Wei; Xiong, Zhihua; Hu, Shuwu; Jiang, Jiantao; Wang, Li; Cheng, Tingqing; Wu, Xiaoyu; Jiang, Haihe

doi:10.1016/j.infrared.2019.03.029

Cited by 20 publications

(6 citation statements)

References 22 publications

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“…In the recent years, the AO modulator materials used around the 3 µm waveband mainly include germanium (Ge) and paratellurite (TeO 2 ) crystals. [16,17] The TeO 2 crystal possesses a higher damage threshold than Ge crystal, [18] which makes the TeO 2 crystal expectedly an ideal material for high peak power AO Q-switched pulse laser at 3 µm.…”

Section: Introductionmentioning

confidence: 99%

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

et al. 2023

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We demonstrate a high-energy and high-power pulse laser on a xenon lamp-pumped Er:YAP crystal. The laser performance and thermal focal lengths under different working frequencies are discussed, the results show that the thermal lens effect is gradually aggravated with the increase of working frequencies, and even working at 100 Hz, a single pulse energy of 234 mJ can be achieved. A maximum average power of 41.5 W is achieved with a working frequency of 20 Hz and slope efficiency of 2.82%. This output power is much higher than other xenon lamp-pumped Erbium laser devices. A Q-switched laser is demonstrated by using the TeO2 crystal, the maximum output energies of 11.5 and 3.5 mJ are obtained at 50 and 100 Hz, the corresponding peak powers are 93.4 and 17.2 kW. The laser wavelengths and beam quality factors are also characterized in the free running and Q-switched modes, respectively. A higher pulse energy and peak power laser could be achieved further by improving the damage threshold of TeO2 A-O Q-switching. All the experimental results illustrate that the xenon lamp-pumped Er:YAP laser is a promising candidate for the high-power and high-frequency mid-infrared laser device.

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Section: Introductionmentioning

confidence: 99%

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

et al. 2023

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“…Particularly, all-fiber Q-switched fiber lasers are highly desirable for these applications due to their compactness and robustness. The Q-switched lasers can be realized using various techniques including active devices (electro-optic or acousto-optic modulators) [4,5] and passive saturable absorbers (SAs) [6][7][8]. Passive methods are preferable due to their advantages of simplicity, compactness, an all-fiber format, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Q-switched pulse generation by stimulated Brillouin scattering assisted four-wave mixing effect in erbium–bismuth co-doped multi-elements silica glass based optical fiber laser

Ghosh,

Ali,

Arsad

et al. 2023

Laser Phys.

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We demonstrate Q-switched pulse generation at the 1562.5 nm region by using a 70 cm long erbium–bismuth co-doped alumina–germania–hafnium–yttria silica glass-based fiber as a gain medium in a simple ring resonator configured without saturable absorber and optical isolator devices. The Q-switching was obtained based on a stimulated Brillouin scattering assisted four-wave mixing effect in the gain medium, which induced the intensity modulation mechanism. The laser produced a multi-wavelength output comb centered at 1562.6 nm with a peak-to-peak spacing of about 0.09 nm due to nonlinear effects. Stable Q-switched operation of a hafnia–bismuth–erbium co-doped fiber laser was obtained at a pump power range of 129–319 mW with the repetition rate varying from 45.9 kHz to 89.3 kHz and the pulse width ranging from 8.8 µs to 3.58 µs. A maximum pulse energy of 26.9 nJ at an average output power of 2.4 dBm was achieved. This demonstrates a new passive technique based on a highly nonlinear gain medium for realizing Q-switched all-fiber laser sources.

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“…Compensating or reducing the strong thermal lensing effect in the laser crystal to achieve higher output energy and better beam quality is one of the main problems in the field of developed midinfrared laser. The main means of thermal lensing effect compensation are grinding negative curvatures on the crystal ends [12,13], thermal bonding [13,14], and thermal stable resonator structure [15][16][17]. Among them, thermal bonding technology is mainly used in the LD pumped laser system [13,14,18].…”

Section: Introductionmentioning

confidence: 99%

2.79-μm high peak power LiNbO3 acousto-optic Q-switched Er,Cr:YSGG laser with thermal lensing effect compensation

Jiang

et al. 2023

Front. Phys.

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A new type of lithium niobate (LiNbO3) acousto-optic Q-switched Er,Cr:YSGG laser with high peak power was designed and the thermal lensing effect compensation was studied. The values of thermal focal length in the gain medium were calculated theoretically and measured experimentally. The experimental results validate the designed plane-convex resonator validity, and the output performance of the 2.79 μm Er,Cr:YSGG laser was obviously improved. When the laser operated at free running region, the maximum values of pulse energy was 160 mJ at 60 Hz, compared with the plane-parallel resonator, the pulse energy was increased by 2 times in the plane-convex resonator. When the LiNbO3 Q-switched laser operated at 60 Hz, the maximum values of pulse energy was 8.5 mJ, and the minimum values of pulse duration was 60.8 ns, and the corresponding peak power approximately was 140 kW, respectively. Compared with the plane-parallel resonator, the pulse energy was increased by 1.6 times in the plane-convex resonator, the corresponding peak power was increased by 2.3 times.

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100–300 Hz repetition-rate acousto-optic Q-switched 2.79 μm Er:YSGG laser side-pumped by laser-diode

Cited by 20 publications

References 22 publications

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

Q-switched pulse generation by stimulated Brillouin scattering assisted four-wave mixing effect in erbium–bismuth co-doped multi-elements silica glass based optical fiber laser

2.79-μm high peak power LiNbO3 acousto-optic Q-switched Er,Cr:YSGG laser with thermal lensing effect compensation

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100–300 Hz repetition-rate acousto-optic Q-switched 2.79 μm Er:YSGG laser side-pumped by laser-diode

Cited by 20 publications

References 22 publications

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

High-power xenon lamp-pumped Er:YAP pulse laser operated in free-running and acousto-optical Q-switching modes

Q-switched pulse generation by stimulated Brillouin scattering assisted four-wave mixing effect in erbium–bismuth co-doped multi-elements silica glass based optical fiber laser

2.79-μm high peak power LiNbO3 acousto-optic Q-switched Er,Cr:YSGG laser with thermal lensing effect compensation

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100–300 Hz repetition-rate acousto-optic Q-switched 2.79 μm Er:YSGG laser side-pumped by laser-diode