Q-switched 1329  nm Nd:CNGG laser

Abstract

We demonstrate a laser-diode-pumped Q-switched 1329 nm neodymium-doped calcium-niobium-gallium-garnet (Nd:CNGG) laser using a V:YAG crystal as a saturable absorber. An average output power of 353 mW and a repetition rate of 13.43 kHz for Q-switched pulses were obtained. The pulse width was from 124 to 151.4 ns under different pump powers. Output power of 685 mW was obtained without the V:YAG crystal inserted.

Unravelling the atomistic mechanisms underpinning the morphological evolution of Al-alloyed hematite

“…For example, hematite nanoparticles of small size show enhanced adsorption of chromium(VI), higher discharge capacity, superior cycling reversibility for lithium-ion batteries, and catalytic performance. [59][60][61] This will be further explored by us for some specific applications in the future.…”

Passively Q-Switched Nd,Cr:YAG Laser Simultaneous Dual-Wavelength Operation at 946 nm and 1.3 μm

“…The variation tendency of pulse width of 1.3 µm is similar to the result of Refs. [28,29]. Figure 5 shows the pulse widths of dual-wavelength under different absorbed pump powers.…”

Secondary particle size determining sedimentation and adsorption kinetics of titanate-based materials for ammonia nitrogen and methylene blue removal

“…It has been widely demonstrated that solution pH, environment temperature or contact time, and the properties of an adsorbent such as surface charge, functional groups, or pore structure can significantly impact the adsorption performance [8][9][10][11][12]. However, the particle size effect on the adsorbent properties and adsorption process is less still unclear, even though most adsorbent materials for NH4 + or MB are powders or particles in nature [13,14]. It has been shown that many fundamental properties of powder materials like mechanical and electrical performance are size-dependent when the diameter of particles are nanoscale [15].…”