KYW Crystal No Further a Mystery
KYW Crystal No Further a Mystery
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This exceptional characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at very low All round publicity, and drives programs like deep-tissue multiphoton microscopy and higher-precision eye operation
The Yb:KYW crystal’s proficiency in mild absorption at all-around 981 nm tends to make the crystal well matched for diode pumping. It's more Improved by its outstanding effectiveness in this method, coupled with its minimal quantum defect.
FIG. four. Autocorrelation operate of the heartbeat 共a兲and spectrum 共b兲of the laser with an oblong active component for an output electrical power of seven hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with direct longitudinal pumping by impressive linear arrays of semiconductor injection lasers acquiring fiber output. To prevent spectral narrowing through amplification and the corresponding lengthening of the amplified pulse when it's compressed, a combination of two Yb:KYW crystals have been utilised, with the spectral maxima with the amplification shifted relative to each other and with spectral profiling with the amplified radiation.
Immediately after air drying and subsequent cleansing that has a cotton cloth soaked in Liquor, the film surface showed no indications of peeling or scratches.
FIG. 1. Optical layout of a laser with direct pumping Using the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output
5 mm in addition to the middle on the beam caustic. As a way to Test the method matching simulation, we executed the experiment with Ng-Slice crystal oscillator, which was developed Formerly and in a exact same ailment with simulation [11]. As shown in Determine three(b) with crimson dots and line, the CW output electric power is highly dependent on the place of laser crystal along with the experimental consequence coincides well with simulation result. Being a note, multimode operation transpired in experiment in the event the size from the pump beam is larger than TEM00 cavity manner and it brings about increased CW output electric power within the displacement location under three.5 mm.
For tungstates, the ytterbium doping focus can be very superior devoid of important quenching as the replaced ions have an incredibly similar ion radius, as well as inter-ion distance is pretty substantial.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW because of the very similar sizes here of such chemical elements as much as 100% of Yb-doping can be accomplished.
The thermal conductivity of common double tungstates is in the get to 3–4 W/(K m) �?which isn't undesirable in contrast with other laser crystals (although quite a few moments under for YAG), and fairly substantial in comparison Along with the thermal conductivity of normal glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is usually a extraordinary content that performs a significant function in laser technological innovation. Its Major purpose should be to crank out ultrashort pulses of light, spanning only a few hundred femtoseconds.
Simultaneously, a shorter laser wavelength might be received; it is possible to operate that has a quantum defect effectively beneath 1%. Being a consequence, the warmth technology is usually so small that this partly compensates the reduce thermal conductivity.