Low-threshold diode-pumped Yb3+,Na+:CaF2 self-Q-switched laser

Abstract

For the first time to our knowledge, the laser performance of Yb3+, Na+-codoped CaF2 single crystals was demonstrated. Self-Q-switched laser operation at 1050nm was observed for 976 nm diode pumping at room temperature. On 5 W of incident power, the repetition rate and width of the self-Q-switched pulses reached 28 kHz and 1.5 micros, respectively. A maximal slope efficiency of 20.3% and minimal threshold absorbed pump power of 30 mW were respectively achieved with different output couplers, showing the promising application of Yb3+, Na+-codoped CaF2 crystals as compact and efficient solid-state lasers.

Narrow-linewidth Q-switched DBR laser on Ytterbium-doped glass

“…Inside those trains, pulses of 170 ns duration and around 30 kHz repetition rate can be measured. This unstable behavior has already been reported in the literature for similar devices [13], [14]. A possible cause for this self-pulsing operation can be the existence of a small re-injection of the laser signal in the cavity, coming from the multiplexer or from the output connector.…”

Morphology and optical properties of Mg and Sr doped CaF2 nanocrystals

“…CaF 2 single crystal is widely used as host material of luminescent ions, due to its high transparency in a broad wavelength range, low refractive index and low phonon energy. Recently, high power diode-pumped femtosecond laser as well as self-Q-switched laser based on Yb doped and Na-Yb codoped CaF 2 crystals were developed [5]. Light emitting structures based on nanocrystalline Si/CaF 2 system were developed featuring a great dependence of the photoluminescence properties from the nanoparticles size [6].…”

Laser crystals and ceramics: recent advances

“…c) Crystals contained oxygen: in the table they introduced conditionally. d) For suppressing the formation of Yb 2+ ions in [706] was grown laser crystals CaF2:Na + ,Yb 3+ . optical properties, characteristics of a number of disordered cubic fluorides doped with Nd 3+ ions, they are considered as substitutes for neodymium glasses in high-power lasers, including laser fusion driver systems (see, e.g.…”