5 Simple Statements About KYW Crystal Explained
5 Simple Statements About KYW Crystal Explained
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is often a exceptional substance that plays a significant position in laser technological innovation. Its Major operate should be to make ultrashort pulses of light, spanning only a few hundred femtoseconds.
We present a dual-crystal Yb:KGW laserthat iscapable to work being a Q-switched oscillator with output power as much as 24 W and pulse size of twenty ns,or to be a regenerative amplifier with output energy nearly 21 W and pulse duration under two hundred fs after compression of chirped pulses. Both equally lasers have exceptional beam high quality with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals Show potent peaks at 980 nm and 1030 nm, respectively, guaranteeing economical energy conversion and significant overall performance in laser systems.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by powerful linear arrays of semiconductor injection lasers possessing fiber output. To circumvent spectral narrowing through amplification as well as corresponding lengthening from the amplified pulse when it's compressed, a mix of two Yb:KYW crystals ended up employed, Together with the spectral maxima on the amplification shifted relative to each other and with spectral profiling from the amplified radiation.
Adhesion Check Compliant with MIL-C-675C armed service expectations, an adhesion website take a look at included implementing a tape that fulfills LT-90 specs on to the lens film layer. The tape was affixed absolutely and after that taken off vertically. This process was done 3 times, causing no blistering or peeling.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and are utilised as lasing components to create ultrashort (~ a hundred-200 fs) higher energy pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes running at 981 nm supports compact laser devices.
Tungstates tend to have significant Raman coefficients (�?Raman scattering). As a result, they can crank out important Raman achieve at average optical intensities. It is feasible to utilize the laser crystal itself as a Raman converter.
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Even so, as soon as Nd3+:YAG grew to become commercially available, the curiosity in CaWO4 dropped sharply. In later on years, specific other tungstate crystals began to catch the attention of plenty of interest.
The thermal conductivity of popular double tungstates is with the buy to 3–4 W/(K m) �?which isn't terrible compared with other laser crystals (although several periods below for YAG), and pretty massive in contrast While using the thermal conductivity of normal glasses.
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At the same time, a shorter laser wavelength can be attained; it is achievable to function having a quantum defect perfectly underneath 1%. To be a consequence, the heat technology might be so little that this partly compensates the lower thermal conductivity.