TAILIEUCHUNG - The pulsed diode end-pumped passively q-switched solid state ND3 : Yag laser
The pulsed diode end-pumped passively Q-switched solid-state Nd:YAG lasers are investigated experimentally. A high power laser diode (pulse repetition rate adjustable from 1 Hz to 10 kHz, pulse duration of 600 s) is used as a pumping laser. The obtained results show that the pulsed diode end-pumped passively Q-switched solid state Nd- doped lasers have the advantages in controlling pulse repetition rate, improving nanosecond solid-state laser pulse power and stability (low jitter) in comparison with the use of CW diode end-pumping. | Nguyễn Văn Hảo và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 78(02): 35 - 38 THE PULSED-DIODE END-PUMPED PASSIVELY Q-SWITCHED SOLID-STATE Nd3+: YAG LASER Nguyen Van Hao1*, Nguyen Thi Xiem1,Nguyen Thi Nhu Hai1, Nguyen Trong Nghia2 1 2 College of Science, Thai Nguyen University, Vietnam Center for Quantum Electronics, Institute of Physics, VAST, Vietnam ABSTRACT The pulsed diode end-pumped passively Q-switched solid-state Nd:YAG lasers are investigated experimentally. A high power laser diode (pulse repetition rate adjustable from 1 Hz to 10 kHz, pulse duration of 600 s) is used as a pumping laser. The obtained results show that the pulsed diode end-pumped passively Q-switched solid state Nd- doped lasers have the advantages in controlling pulse repetition rate, improving nanosecond solid-state laser pulse power and stability (low jitter) in comparison with the use of CW diode end-pumping. Keywords: Nd: YAG crystal, diode-pumped laser, passive Q-switching, controlled repetition rate INTRODUCTION* High energy laser pulses of short durations may be obtained by Q-switching techniques of laser cavity. Compared with active Qswitching, passive Q-switching is more economical and practical because of the modest requirement of optical elements inside the laser cavity. Therefore, these techniques have attracted much research and development both in experiment and theory [1-17]. In the passively Q-switched Nd3+ doped solid-state lasers, Cr4+: YAG crystal is widely used. It has been allowed to create allsolid-state compact, simple, and pulsed lasers, providing laser pulses ranging from several to tens of nanoseconds. Pulse repetition rate of solid-state laser can reach a few hundred kHz [5-7], however, a fix characteristic of CW pumped passively Q-switched solid-state laser is low time stability (high jitter). Thus, it has prevented many applications of these lasers. In this paper, we report the experimental results in research and development of pulsed-diode end-pumped Nd3+: YAG .
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