KYW Crystal Secrets
KYW Crystal Secrets
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is quite massive when compared with that of Yb:YAG. This enables for extensive wavelength tunability and for A great deal shorter pulse durations from manner-locked lasers. Values perfectly below a hundred fs have been attained with passive method locking.
This exceptional characteristic of ultrafast pulses permits nonlinear optical conversation with tissue at low In general exposure, and drives purposes including deep-tissue multiphoton microscopy and significant-precision eye medical procedures
We present a dual-crystal Yb:KGW laserthat iscapable to operate as being a Q-switched oscillator with output ability approximately 24 W and pulse duration of twenty ns,or like a regenerative amplifier with output electric power around 21 W and pulse duration beneath 200 fs just after compression of chirped pulses. Both of those lasers have excellent beam quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers acquiring fiber output. To avoid spectral narrowing throughout amplification as well as corresponding lengthening in the amplified pulse when it really is compressed, a mix of two Yb:KYW crystals had been applied, Using the spectral maxima with the amplification shifted relative to one another and with spectral profiling of the amplified radiation.
The monoclinic crystal structures ends in a all-natural birefringence, assisting to steer clear of thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical layout of a laser with direct pumping with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
five mm other than the middle from the beam caustic. As a way to check the mode matching simulation, we carried out the experiment with Ng-Minimize crystal oscillator, which was made Formerly and in a exact condition with simulation [11]. As proven in Figure 3(b) with pink dots and line, the CW output ability is extremely dependent on the place of laser crystal along with the experimental outcome coincides well with simulation end result. To be a Be aware, multimode operation happened in experiment if the measurement in the pump beam is greater than TEM00 cavity mode and it causes bigger CW output ability during the displacement area down below three.five mm.
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On the other hand, after Nd3+:YAG became commercially available, the curiosity in CaWO4 dropped sharply. In later decades, selected other tungstate crystals started to attract loads of consideration.
The thermal conductivity of prevalent double tungstates is with the buy to three–4 W/(K m) �?which isn't terrible as opposed with other laser crystals (although numerous instances lower than for YAG), and relatively big in contrast Using the thermal conductivity of typical Eyeglasses.
Li2WO4-WO3 flux was properly applied lessening the growth temperature underneath 900 oC. In line with one crystal x-ray measurements, the crystal corresponds on the P2/n space team.
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