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This unique characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at reduced General publicity, and drives applications such as deep-tissue multiphoton microscopy and large-precision eye operation

Femtosecond laser based on Yb:KYW crystals with suppression of spectral narrowing in a regenerative amplifier by spectral profiling of the pulse

FIG. 4. Autocorrelation function of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular Lively component for an output energy of seven-hundred mW. The width of

This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with direct longitudinal pumping by highly effective linear arrays of semiconductor injection lasers having fiber output. To prevent spectral narrowing during amplification and the corresponding lengthening of the amplified pulse when it is actually compressed, a mix of two Yb:KYW crystals had been utilized, with the spectral maxima of your amplification shifted relative to each other and with spectral profiling of the amplified radiation.

Adhesion Test Compliant with MIL-C-675C military specifications, an adhesion check included applying a tape that meets LT-90 requirements on to the lens movie layer. The tape was affixed fully then taken off vertically. This course of action was executed thrice, causing no blistering or peeling.

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5 mm apart from the middle with the beam caustic. So as to Check out the manner matching simulation, we executed the experiment with Ng-cut crystal oscillator, which was designed Beforehand and in a similar problem with simulation [11]. As revealed in Determine 3(b) with purple dots and line, the CW output electric power is highly depending on the posture of laser crystal and also the experimental outcome coincides properly with simulation consequence. Like a Notice, multimode operation happened in experiment if the size of your pump beam is more substantial than TEM00 cavity method and it triggers larger CW output energy within the displacement area under three.five mm.

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Having said that, at the time Nd3+:YAG grew to become commercially offered, the fascination in CaWO4 dropped sharply. In afterwards years, specific other tungstate crystals began to catch the attention of lots of focus.

The thermal conductivity of frequent double tungstates is of the buy to 3–4 W/(K m) �?which isn't poor as opposed with other laser crystals (Despite the fact that several periods lower than for YAG), and rather large when compared While using the thermal conductivity of common Eyeglasses.

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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at space temperature ended up calculated. The emission spectrum and life span from the 3 F 4 enthusiastic point out were being determined. Utilizing normal and modified Judd–Ofelt theories, the intensity parameters along with the radiative lifetimes had been calculated and fantastic settlement While using the experimental results was attained for both of those theories.

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