High Power Diode-Side-Pumped Q-Switched Nd:YAG Solid-State Laser with a Thermoelectric Cooler

Dong, Jun; Liu, Xuesheng; Peng, Chao; Liu, Youqiang; Wang, Zhiyong

doi:10.3390/app5041837

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…A Nd:YAG laser system based on the MOPA approach operating at 300 Hz and using selectable 350-600 ps nominally flat temporal pulse shape has been reported, which generate pulses with 127 mJ energy and maximum peak power of 400 MW [23], but beam quality M 2 were not measured. As is already known, beam quality always gets worse due to thermally induced birefringence in Nd:YAG crystal [21,24]. Laser systems based on end-pumped bulk Nd:YVO 4 crystal have better beam quality because of natural birefringence architecture, which can alleviate thermally induced birefringence [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

et al. 2019

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We present a compact sub-nanosecond diode-end-pumped Nd:YVO 4 laser system running at 1 kHz. A maximum output energy of 65.4 mJ without significant stimulated Raman scattering (SRS) process was obtained with a pulse duration of 600 ps, corresponding to a pulse peak power of 109 MW. Laser pulses from this system had good beam quality, where M 2 < 1.6, and the excellent signal to noise ratio was more than 42 dB. By frequency doubling with an LBO crystal, 532 nm green light with an average power of 40.5 W and a power stability of 0.28% was achieved. The diode-end-pumped pump power limitation on a high peak power amplifier caused by the SRS process and thermal fracture in bulk Nd:YVO 4 crystal is also analyzed.

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Section: Introductionmentioning

confidence: 99%

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

et al. 2019

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“…The laser with high peak power and narrow pulse width is easier to be obtained by using EO Q‐switch. So far, several results of electro‐optic lasers have been reported 9,10 . In 2008, Li et al showed an EO Q‐switched laser with output energy of 24.2 mJ, 7.1 ns at 1 kHz with two end‐pumped Nd:YLF slabs and an off‐axis positive branch stable‐unstable oscillator 11 .…”

Section: Introductionmentioning

confidence: 99%

“…So far, several results of electro-optic lasers have been reported. 9,10 In 2008, Li et al showed an EO Q-switched laser with output energy of 24.2 mJ, 7.1 ns at 1 kHz with two end-pumped Nd:YLF slabs and an offaxis positive branch stable-unstable oscillator. 11 By utilizing a stable-unstable Nd:YAG hybrid resonator, Zhu et al proposed a 169 W 1064 nm laser at 10 kHz with a pulse width of 11 ns in 2009.…”

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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“…Jian Dong et al [16] investigated a high power diode-side-pumped Q-switched Nd:YAG solid-state laser under 808nm side-pumping without a water cooler. Two TECs were adopted to maintain the temperature of the LD module, and it was observed that precision of the TEC controller impacted the relative stability of the output energy.…”

Section: Introductionmentioning

confidence: 99%

A Tunable Mid-Infrared Solid-State Laser with a Compact Thermal Control System

Zhang

Pan

et al. 2018

Applied Sciences

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Tunable mid-infrared lasers are widely used in laser spectroscopy, gas sensing and many other related areas. In order to solve heat dissipation problems and improve the environmental temperature adaptability of solid-state laser sources, a tunable all-fiber laser pumped optical parametric oscillator (OPO) was established, and a compact thermal control system based on thermoelectric coolers, an automatic temperature control circuit, cooling fins, fans and heat pipes was integrated and designed for the laser. This system is compact, light and air-cooling which satisfies the demand for miniaturization of lasers. A mathematical model and method was established to estimate the cooling capacity of this thermal control system under different ambient environments. A finite-element model was built and simulated to analyze the thermal transfer process. Experiments in room and high temperature environments were carried out and showed that the substrate temperature of a pump module could be maintained at a stable value with controlled precision to 0.2 degrees, while the output power stability of the laser was within ±1%. The experimental results indicate that this compact air-cooling thermal control system could effectively solve the heat dissipation problem of mid-infrared solid-state lasers with a one hundred watts level pump module in room and high temperature environments.

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High Power Diode-Side-Pumped Q-Switched Nd:YAG Solid-State Laser with a Thermoelectric Cooler

Cited by 13 publications

References 17 publications

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

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

A Tunable Mid-Infrared Solid-State Laser with a Compact Thermal Control System

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