کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7130401 | 1461634 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Detection and analysis on versatile coding strategies of high frequency active Q-switched Nd:YVO4 laser for irradiance of different targets
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
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چکیده انگلیسی
We report an active Q-switching with different coded schemes generated in the high power diode end pumped Nd:YVO4 laser (DEPSS) using two different techniques of special combination of optical choppers and acousto-optic modulator (AOM) at higher repetition rates of 100Â kHz for the first time to the best of our knowledge in any practical laser target designation (LTD) systems. The highest peak power of 95.4Â kW with the lowest pulse repetition frequency of 222Â Hz and pulse width of 46Â ns at FWHM with the pulse-to-pulse stability of ~95% was measured at certain regime of operation. Special modulation and coding of high stable, high peak power Nd:YVO4 laser pulses at 1064Â nm using the combination of different optical chopper blades were achieved. A high peak power of more than 4.84Â kW with the shortest pulse width of 25Â ns at FWHM has been obtained using an acousto-optic modulator (AOM) as an active Q-switched. The pulse-to-pulse stability was measured and improved to be ~97% at high repetition rate ranges from 10Â kHz to 100Â kHz. The correlation between the coded laser irradiation (transmitted) and the scattered (received) laser signals for three different targets materials of sand, wood and metal using this laser designation system are examined and discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 64, December 2014, Pages 124-132
Journal: Optics & Laser Technology - Volume 64, December 2014, Pages 124-132
نویسندگان
Ashraf F. El-Sherif, Mahmoud Talaat,