1.4-MHz repetition rate electro-optic Q-switched Nd:YVO_4 laser

Abstract

An electro-optic (EO) deflector was used for Q-switching of a laser cavity with a Nd-doped yttrium vanadate (Nd:YVO(4)), enabling a short pulse width and a high peak power to be achieved at a high repetition rate of over 1 MHz. The EO deflector has a low optical loss during Q-switching without polarizers and can be used to form a short laser cavity. A repetition rate of 1.4 MHz with a pulse width of 39 ns was achieved. An output power of 2.7 W was obtained at a pump power of 6.5 W.

High-efficient diode-end-pumped actively Q-switched Nd:YAG/Nd:YVO4 laser

“…The pulsed laser achieved by means of actively Q-switched laser has flexible and adjustable pulse repetition frequency, which is crucial for light source in many applications. The electro-optic (EO) Qswitching [9] and acousto-optic (AO) Q-switching [10] technique are the practical approaches to implement actively Qswitched laser. The AO Q-switched solid-state laser, in particular, is an excellent method for generating repetition rates in the orders of thousands to millions of hertz [10] and high average output power [11], which is the ideal light source for material processing, high speed ranging and optical countermeasure [12][13][14].…”

High efficiency sub-nanosecond electro–optical Q-switched laser operating at kilohertz repetition frequency*

“…[13] However, the pulse energy of this kind of laser was excessively low due to the poor absorbed pump energy. Horiuchi et al presented an alternative method by using an EO deflector, [14] a pulse laser with 100-kHz PRF, nearly 0.02-mJ pulse energy and 6.4ns PW was obtained due to the short cavity length and the high speed of loss switching of the deflector. Another method frequently used to build EO Q-switched lasers with short PW is to employ output coupler (OC) with high transmission.…”

1.5-MHz repetition rate passively Q-switched Nd:YVO 4 laser based on WS 2 saturable absorber

“…Therefore, Q-switched SSLs, especially at 1 µm wavelength, have extensive applications in the fine processing, military and medical fields, etc. [3][4][5] In recent years, many military applications, such as optoelectronic countermeasure and precision laser radar, require high power lasers that emit sub-microsecond pulses with a high repetition rate. [6,7] With the power and pulse width fixed, the higher the repetition rate of laser pulse, the better the interference effect is and the wider the expanded scope of its military applications.…”