Efficient passive Q-switching operation of a diode-pumped Nd:GdVO_4 laser with a Cr^4+ : YAG saturable absorber

Diode Pumped High Peak Power Quasi Q-Switched and Passively Q-Switched Nd:YVO<sub>4</sub> Lasers at 1064 nm and 532 nm using Cr:YAG and KTP crystals

“…It is useful for making green laser which used in many different applications like LIDAR, medical applications, detect [24][25][26][27][28][29][30][31].…”

“…Figures 18(a) and (b) show experimental set up and photograph for the Nd:YVO 4 /Cr:YAG laser system. Passive Q-switched laser at 1064 nm with an average power of ranges from 0.5 W to 3.25 W using Cr:YAG [11,[14][15][16] initial transmission of 30% as in Figure 19, pulse repetition rate ranges from 45 kHz to 400 kHz. Figure 20(a), pulse width ranges from the shortest one of 4 ns to the largest pulse width of 250 ns at FWHM using initial transmission of 40% and 70%, and increased to 3 power of 2 W, as seen in and peak power at certain mode of operation for limited pump power range m 13 kW to 18 kW using 70% and 30%, respectiv re investigated and The time characteristics of the highest and fast passive Q-switched laser pulses were measured with the help of a fast vacuum photodiode (Thorlab Inc. model PDA10C) and Tektronix oscilloscope TDS 3052B (200 MHz, 2 GS/s).…”

“…Exploring the properties of Nd:YVO 4 lasers has become very common in the scientific literature in the last decade [6][7][8]. One important direction popular was related to Q-switching of Nd:YVO 4 and microchip lasers [9][10][11][12]. In general, Q-switching is an effect in which pulses of light appear at the output of the laser while continuous pumping is applied.…”

Passively Q-switched diode-pumped Cr4+:YAG/Nd3+:GdVO4 monolithic microchip laser

“…However, as emphasized by several authors [11][12][13], it is crucial to match the so-called "Qswitching criterion" in order to obtain giant pulses: if the gain cross section of the laser crystal is larger than the absorption cross section of the saturable absorber, the energy stored in the cavity might be too small to bleach the saturable absorber, leading to quasi-CW operation or at least broadening of the pulse duration.…”

Self Q-switching effect in a <inline-formula><math altimg="none" display="inline" overflow="scroll"><mrow><mi>Nd</mi><mo>:</mo><msub><mi>YVO</mi><mn>4</mn></msub><mo>∕</mo><mi>KTP</mi></mrow></math></inline-formula> lasing unit

“…One important direction that is very popular is related to Q-switching of Nd: YVO 4 and microchip lasers. [5][6][7][8] Generally speaking, Q-switching is an effect in which pulses of light appear at the output of the laser while continuous pumping is applied. Such an effect is obtained by insertion of time-dependent losses into the cavity or by varying the transmission coefficient of the mirrors, which can be done in an active manner ͑electro-optical modulators͒ or passively.…”