Actively Q-Switched Multisegmented Nd:YAG Laser Pumped at 885 nm for Remote Sensing

Evangelatos, Christos; Tsaknakis, G.; Bakopoulos, P.; Papadopoulos, Dimitris N.; Avdikos, Georgios; Papayannis, Alexandros; Tzeremes, Georgios

doi:10.1109/lpt.2014.2341656

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…The average pump power is 8.4 w and the pump pulse width is 300 μs. A pair of aspheric coupling lenses are used as collimating lenses for reducing spherical aberration and increasing pump power In the optical path, M5 is the pump beam splitter, which can filter the remaining pump light and reflect the weak 1064nm laser to the photodetector PD, so as to generate optical synchronization signal [5][6].…”

Section: Methodsmentioning

confidence: 99%

885nm-LD end-pumped burst-mode laser

Yao

Fang

Gao

et al. 2022

Seventeenth National Conference on Laser Technology and Optoelectronics

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An 885nm LD end-pumped burst-mode laser with high repetition frequency and low thermal effect is introduced in this paper. The laser can solve the problem of high repetition frequency and high energy in the traditional continuous pulse output mode, and can meet the requirements of light source of airborne lidar well. The laser adopts the main oscillating power amplification (MOPA) structure. The oscillating stage uses 885nmLD pulse pumped Nd:YAG crystal, which can reduce the thermal power consumption of the laser. The electro-optic Q-switch is used for intra-cavity modulation, and the output pulse train with a repetition frequency of 4Hz, each pulse train contains 60 sub-pulses with a repetition frequency of 1kHz.Finally, the fundamental frequency light with central wavelength of 1064nm, sub-pulse repetition frequency of 1kHz, single pulse energy of 6.1mJ and beam quality is obtained. In the amplification stage, 885nm end-pumped Nd: YAG crystal was used. After one-way amplification, the laser output with sub-pulse energy of 15.7mJ, pulse width of 12ns and beam quality was obtained.

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Section: Methodsmentioning

confidence: 99%

885nm-LD end-pumped burst-mode laser

Yao

Fang

Gao

et al. 2022

Seventeenth National Conference on Laser Technology and Optoelectronics

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“…Man Zhaoyang 1,2 , Cui Can 1,2* , Wang Yulei 1,2** , Liu Fuhan 1,2 , Li Yindong 1,2 , Bai Zhenxu 1,2 , Lü Zhiwei 1,2…”

Section: Research On Laser Mode Matching Based On Gradiently-doped Cr...unclassified

基于梯度掺杂晶体的激光器模式匹配研究

Man Zhaoyang,

Cui Can,

Wang Yulei

et al. 2024

中国激光

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“…Whereas utilizing direct pumping 885 nm, the Nd 3+ ions are stimulated to the upper level of 4 F 3/2 , leading to a significantly decrease of the quantum defect. [14][15][16][17] The direct pumping at 885 nm reduces the Stokes shift between the pump and the laser energy, which is benefit to reduce thermal load and improve laser performance.…”

Section: Introductionmentioning

confidence: 99%

High energy LiDAR source for long distance, high resolution range imaging

Jiang

Yang

et al. 2020

Micro & Optical Tech Letters

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High energy, high repetition rates laser with excellent beam quality are fundamental components for LiDAR. In particular, high pulse energy is benefit for long distance range imaging. Narrow pulse width and high repetition rates are benefit for high resolution and high refresh rate operation of LiDAR. However, increasing the laser repetition rates will cause the pulse energy decreasing and the pulse width expanding. In order to achieve the requirements at the same time, we propose a 885 nm laser diode end-pumped RTP Q-switched Nd:YAG laser. Pulse pumping scheme was used to avoid heat accumulation. With a master oscillator power amplifier (MOPA) system, 40.5 mJ, 7.5 ns of 1064 nm pulses were obtained at 2 kHz. The beam quality factor M 2 was measured as 1.60/1.51. Moreover, by frequency doubling with a LBO crystal, 16.4 mJ, 6.5 ns of 532 nm laser with the M 2 factor of 1.52 and 1.50 was obtained. The 1064 and 532 nm pulses are suitable for avalanche photodiode arrays LiDAR and streak tube imaging LiDAR, respectively. The laser system is shown to accomplish high stability from temperature of −10 C to 30 C and vibration frequency of 10 to 100 Hz.

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Actively Q-Switched Multisegmented Nd:YAG Laser Pumped at 885 nm for Remote Sensing

Cited by 9 publications

References 9 publications

885nm-LD end-pumped burst-mode laser

885nm-LD end-pumped burst-mode laser

基于梯度掺杂晶体的激光器模式匹配研究

High energy LiDAR source for long distance, high resolution range imaging

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