Green Laser With V-Shaped Resonant Cavity Based on Nd:YAG/Cr4+:YAG/YAG Composite Crystal Rod

Diode-end-pumped passively Q-switched blue laser with Nd:YAG/YAG/Cr4+:YAG/YAG composite crystal

“…Besides, Nd:YAG crystal, Cr 4+ :YAG and un-doped YAG crystal also can be bonded together for a compact design and achieving multi-functions. This kind of composite crystal has already been used to set up the laser system at 1064 nm, 532 nm and 266 nm [8][9][10][11]. Those above have demonstrated that the composite crystals have an excellent performance of optimizing the laser system.…”

Transparent Ceramics

“…Direct nitridation of Si is a widely used method to synthesize Si 3 N 4 powders, in which Si powder with particle sizes in the range of 5-20 μm is reacted with N 2 at temperatures of 1200-1400°C for 10-30 h [309][310][311][312][313][314]. The Si 3 N 4 powder is usually a mixture of α and β phases.…”

“…Various advanced laser elements with complicated structures, such as end-cap and clad-core designs, which cannot be fabricated directly by using the melt-growth single-crystal technology, have been developed by using the composite laser technology [154,[307][308][309][310][311]. However, significant progress has been achieved with these advanced single-crystal composite lasers, and there are some critical issues that need to be tackled for practical applications.…”

Pulse Fluctuations Caused by the Thermal Lens Effect in a Passively Q-Switched Laser System

“…Bonding of a nondoped crystal at the end face of the gain medium or saturable absorber can accelerate heat transfer and reduce the thermal lens effect, and this method has already been used in different types of laser systems [9][10][11]. However, because of the relatively slow heat transfer of these crystals and the limitations of the temperature control processes, the thermal lens effect cannot be avoided completely, especially in laser diode (LD) end-pumped systems.…”