KYW Crystal - An Overview
KYW Crystal - An Overview
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In practical phrases, the Yb:KYW crystal has found its market in significant-electricity laser programs as a result of its capability to create higher Vitality ultrashort laser pulses when keeping a compact dimension. The interaction of its functions �?seamless ytterbium substitution, powerful absorption features, ultrashort pulse generation and performance in Power conversion �?positions the Yb:KYW crystal as being a cornerstone from the laser technological know-how, covering numerous fields ranging from scientific investigation to industrial programs.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is usually a remarkable substance that performs a vital part in laser know-how. Its Key operate is usually to create ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at about 981 nm would make the crystal like minded for diode pumping. It is even further enhanced by its remarkable effectiveness in this method, coupled with its minimal quantum defect.
FIG. four. Autocorrelation functionality of the heart beat 共a兲and spectrum 共b兲of a laser with a rectangular Energetic component for an output electrical power of seven-hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers obtaining fiber output. To circumvent spectral narrowing through amplification as well as the corresponding lengthening of your amplified pulse when it is compressed, a combination of two Yb:KYW crystals have been applied, With all the spectral maxima in the amplification shifted relative to each other and with spectral profiling in the amplified radiation.
The monoclinic crystal constructions brings about a purely natural birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical layout of a laser with direct pumping With all the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output
A higher brightnessQ-switched oscillator and regenerative amplifier determined by a dual-crystal Yb:KGW laser
For tungstates, the ytterbium doping concentration can be quite significant without considerable quenching as the changed ions have an incredibly related ion radius, as well as inter-ion distance is relatively massive.
Having said that, at the time Nd3+:YAG turned commercially readily available, the fascination in CaWO4 dropped sharply. In later on yrs, specified other tungstate crystals began to catch the attention of a great deal of consideration.
The thermal conductivity of common double tungstates is from the order to three–4 W/(K m) �?which isn't poor in comparison with other laser crystals (although numerous occasions fewer than for YAG), and pretty large compared with the thermal conductivity of common glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared with its counterpart Yb:KGW, is usually a extraordinary product that performs a significant position in laser know-how. Its Principal operate would be to deliver ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
Concurrently, a shorter laser wavelength is often acquired; it can be done to function having a quantum defect well down below 1%. As a consequence, the warmth generation might be so little this partly compensates the reduce thermal conductivity.