KYW Crystal - An Overview
KYW Crystal - An Overview
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is quite big as opposed with that of Yb:YAG. This enables for large wavelength tunability and for Considerably shorter pulse durations from manner-locked lasers. Values properly underneath 100 fs have been accomplished with passive method locking.
This special characteristic of ultrafast pulses allows nonlinear optical interaction with tissue at very low Total exposure, and drives purposes like deep-tissue multiphoton microscopy and higher-precision eye surgery
We current a twin-crystal Yb:KGW laserthat iscapable to work as a Q-switched oscillator with output electrical power nearly 24 W and pulse length of 20 ns,or for a regenerative amplifier with output energy approximately 21 W and pulse length down below 200 fs right after compression of chirped pulses. Both equally lasers have fantastic beam high quality with beam parameter M2
FIG. 4. Autocorrelation function of the pulse 共a兲and spectrum 共b兲of a laser with an oblong Lively aspect for an output ability of 700 mW. The width of
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by impressive linear arrays of semiconductor injection lasers getting fiber output. To avoid spectral narrowing through amplification as well as corresponding lengthening from the amplified pulse when it is compressed, a combination of two Yb:KYW crystals were utilized, With all the spectral maxima in the amplification shifted relative to each other and with spectral profiling in the amplified radiation.
Soon after air drying and subsequent cleansing that has a cotton cloth soaked in Liquor, the film area confirmed no signs of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are used as lasing components to deliver ultrashort (~ a hundred-200 fs) large electricity pulses. Immediate pump of Yb:KGW/KYW crystals with click here laser diodes functioning at 981 nm supports compact laser programs.
5 mm other than the center on the beam caustic. As a way to Examine the method matching simulation, we performed the experiment with Ng-Minimize crystal oscillator, which was formulated previously As well as in a exact same ailment with simulation [eleven]. As proven in Figure 3(b) with pink dots and line, the CW output electric power is highly depending on the situation of laser crystal as well as experimental final result coincides well with simulation final result. Being a Notice, multimode operation occurred in experiment if the sizing of the pump beam is greater than TEM00 cavity mode and it triggers larger CW output electrical power within the displacement area underneath 3.five mm.
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... Not only the situation of crystal from the cavity and also the amplification axis of crystal impacts the laser Procedure drastically, because the absorption and emission cross sections on the crystal are quite unique according to the orientation of your crystal.
The thermal conductivity of common double tungstates is on the get to three–four W/(K m) �?which isn't bad in comparison with other laser crystals (While a number of moments a lot less than for YAG), and rather substantial as opposed Using the thermal conductivity of standard glasses.
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Simultaneously, a shorter laser wavelength can be acquired; it can be done to operate that has a quantum defect nicely underneath one%. As being a consequence, the warmth technology is usually so little that this partly compensates the lessen thermal conductivity.