KYW Crystal - An Overview
KYW Crystal - An Overview
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is a remarkable content that performs an important part in laser technology. Its Principal operate is always to deliver ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
time. Crystals of your compound melts congruently at 1007 oC, nevertheless soften crystallization of top of the range crystal is not possible resulting from phase changeover at ~920 oC. The best seeded Alternative system from
The absorption and emission spectra of Yb:KYW Crystals Display screen powerful peaks at 980 nm and 1030 nm, respectively, making certain productive Electrical power conversion and high functionality in laser units.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers having fiber output. To prevent spectral narrowing all through amplification plus the corresponding lengthening on the amplified pulse when it really is compressed, a mix of two Yb:KYW crystals have been used, While using the spectral maxima on the amplification shifted relative to each other and with spectral profiling on the amplified radiation.
The monoclinic crystal buildings brings about a purely natural birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization decline.
FIG. 1. Optical layout of the laser with direct pumping Using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
Spatial construction in the beam along with the corresponding intensity profiles I in the output from the laser.
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Nevertheless, at more info the time Nd3+:YAG became commercially readily available, the interest in CaWO4 dropped sharply. In later several years, sure other tungstate crystals started to appeal to a great deal of focus.
The thermal conductivity of widespread double tungstates is from the get to three–4 W/(K m) �?which isn't undesirable compared with other laser crystals (Whilst numerous times below for YAG), and fairly massive compared Along with the thermal conductivity of typical glasses.
Li2WO4-WO3 flux was properly used lowering The expansion temperature down below 900 oC. Based on solitary crystal x-ray measurements, the crystal corresponds to your P2/n House group.
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Concurrently, a shorter laser wavelength is often acquired; it is possible to work using a quantum defect very well under one%. Being a consequence, the heat era can be so smaller that this partly compensates the decrease thermal conductivity.