Recent Progresses of LD Pumped Solid State Lasers with High Repetition Rate Electro-Optic Q-Switch

Xiaolei, 朱小磊 Zhu; Hao, 唐昊 Tang; Xiaoli, 李小莉 Li; Juntao, 王君涛 Wang

doi:10.3788/cjl20093607.1654

Cited by 2 publications

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“…Image segmentation is one of the most important content in the field of image recognition, and image binaryzation is used widely for image segmentation. Choosing the right threshold value is the key to image binaryzation technique [3]. The paper presents an image binarization segmentation method based on optimal threshold value by iterative method to separate the object form the background.…”

Section: Computer Recognition Of the Commutator Imagementioning

confidence: 99%

Design of Detection System of Traction Motor Commutator Based on Computer Vision

Zhang

2012

AMR

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The paper presents a new automatic detection system of DC traction motor commutator, which captures the image of traction motor commutator through CCD (Charge Couple Device) camera in real time, and recognizes the eigenvalue of commutator image by utilizing image processing technology. Meantime, the system takes it as the localization signal of numerical control machine. Therefore, computer vision controls cutting tool working instead of eyes in this system. The system has high-performance of precision and real time proved by experiment, so which has a certain value of practicality.

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Section: Computer Recognition Of the Commutator Imagementioning

confidence: 99%

Design of Detection System of Traction Motor Commutator Based on Computer Vision

Zhang

2012

AMR

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“…Ordinary solid pulsed laser output pulses of light pulse width is hundreds of microseconds or even a few milliseconds, the peak power also can just reach tens of kilowatts level, which is far from satisfying the requirement of some applications. High peak power laser beam provides strong light source for plasma physics, laser processing, nonlinear optical and optoelectronic countermeasure technology, and promotes the development of technology such as laser thermonuclear reaction, laser range and high-speed environment parameter detection [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

High repetition-rate and short pulse-width 1064nm laser in a composite crystal device

Wang

Jin

et al. 2014

SPIE Proceedings

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Compared with lamp pumped solid state laser, laser-diode pumped all-solid-state laser (DPSL) has the characteristic of high efficiency, long life and reliable under the condition of high repetition rate. Therefore, A high repetition rate DPSL has a broad application prospect in the laser detection, laser communication and optoelectronic countermeasure and other fields. Laser-diode (LD) pumped acousto-optic(AO) Q-switch all-solid-state has attractive features, such as compact structure, reliable operation, high repetition rate and short pulse width. Laser crystal is the core component of the laser. Usually composite crystal thermal lens focal length is three times more than traditional crystal, so it can avoid the serious heating effect of the operation material bumping by the traditional method. In this paper, we present a high repetition rate acousto-optic Q-switched Nd:YVO 4 laser pumped by 880nm laser diode. By using the 0.25% doping concentration Nd:YVO 4 single end composite crystal size of 3*3*(4+16) mm 3 , with the 50 W LD pumped power, in order to calculate the laser crystal absorption efficiency of pump light, so that more accurate calculation of light conversion efficiency, first we measured 880 nm pump light absorption, crystal is calculated on the pump light absorption efficiency of 75%; When we put in the cavity mirror to form a flat resonant cavity, we obtained the 1064 nm continuous laser output power of 26 W and 27.1 W, with the output mirror transmittance of 20% and 48%, respectively. 50.7% and 48.7% optical to optical conversion efficiency has been achieved experimentally. When we put in AO Q-switch, with the repetition rate of 50 kHz, 100 kHz and 200 kHz, the 1064 nm laser output power is 21 W, 21.28 W and 20.58 W, and the peak power is 32.9 kW, 17.3 kW, 8.5 kW, respectively. Under the high repetition rate circumstance, the pulse width is limited to 12 ns.

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Recent Progresses of LD Pumped Solid State Lasers with High Repetition Rate Electro-Optic Q-Switch

Cited by 2 publications

References 0 publications

Design of Detection System of Traction Motor Commutator Based on Computer Vision

Design of Detection System of Traction Motor Commutator Based on Computer Vision

High repetition-rate and short pulse-width 1064nm laser in a composite crystal device

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