High repetition rate intracavity frequency doubled LD side-pumped ceramic Nd:YAG green laser based on BBO electro-optical Q-switch

Kilohertz high power extracavity KGW yellow raman lasers based on pulse LD side-pumped ceramic Nd: YAG

“…Delay triggering time of the two signals was adjusted to ensure that the emission of 808 nm pulse pumped light by LD synchronizes exactly with the voltage decrease of BBO crystal. Comparison with continuous wave LD side pump ceramic Nd : YAG and BBO electro optical Q switch [30], this method can obtain a shorter pulse width of the laser output.…”

Wavelength switching in Nd:YSAG ceramic laser induced by thermal effect

“…Besides, ceramics can be produced with arbitrary shapes and sizes. Neodymium doped yttrium aluminum garnet (Nd:YAG) ceramics nowadays have essentially the same laser efficiency as single crystals, and have been demonstrated for continuous wave (CW) and Q-switched operation at 0.946 µm [2,3], 1.064 µm [4][5][6], or 0.532 µm [7], 1.123 µm [8,9], and 1.319 µm [10,11]. Advantageously, a much larger and homogenous doping concentration can be achieved in Nd-doped yttrium aluminum garnet (Nd:YAG) ceramics [4,5,12,13].…”

Short pulse width UV laser at 355 nm based on pulse LD side-pumped ceramic Nd:YAG and BBO electro-optical Q-switched

“…6. Since the upper level lifetime of ceramic Nd:YAG is about 234 μs [22], which the Q switch repetition rate corresponds to is 4.35 kHz, there is enough time between pulses to make the triggering upper level reversal particle number of ceramic Nd:YAG reach the maximum value at a low repetition rate of 1-20 Hz, and at the same pulse frequency, sin gle pulse energy of 355 nm UV pulse laser increases with the augmentation of LD pump current. Besides, the lower the frequency of pulse signal generator is, the more sufficient charging and discharging time of LD array is, and the higher the electro optical conversion efficiency of 808 nm pumped laser, the frequency dou bling efficiency and sum frequency generation effi ciency of 1064 nm fundamental frequency beam are, so at the same pump current, the lower the pulse fre quency is, the higher the single pulse energy of 355 nm UV pulse laser is, just as shown in Fig.…”