KYW Crystal No Further a Mystery
KYW Crystal No Further a Mystery
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is quite substantial compared with that of Yb:YAG. This enables for extensive wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values very well underneath 100 fs have already been reached with passive mode locking.
This exclusive attribute of ultrafast pulses enables nonlinear optical interaction with tissue at small General exposure, and drives apps such as deep-tissue multiphoton microscopy and higher-precision eye operation
The Yb:KYW crystal’s proficiency in mild absorption at close to 981 nm can make the crystal compatible for diode pumping. It truly is even more Improved by its exceptional efficiency in this method, coupled with its lower quantum defect.
FIG. four. Autocorrelation operate of the heart beat 共a兲and spectrum 共b兲of a laser with an oblong Lively factor for an output power of seven hundred mW. The width of
Optical layout of the laser with direct pumping Along with the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output from the radiation, WP is usually a fifty percent-wave plate, CL is a collimating lens, FL can be a concentrating lens, AE is undoubtedly an Lively aspect produced from an Yb:KYW crystal, DM is a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC may be the output mirror, and SAM is often a semiconductor saturable-absorber mirror.
The monoclinic crystal constructions leads to a pure birefringence, helping to prevent thermally induced polarization rotation and depolarization reduction.
Raman, luminescence and transmission spectra expose optical options owing towards the presence of thulium ions, and as a consequence the products may very well be even further examined while in the scope of laser and luminescence programs.
five mm besides the center with the beam caustic. As a way to check the method matching simulation, we executed the experiment with Ng-Minimize crystal oscillator, which was developed Earlier As well as in a exact same affliction with simulation [11]. As proven in Figure 3(b) with purple dots and line, the CW output power is highly dependent on the posture of laser crystal and also the experimental end result coincides perfectly with simulation result. Like a Observe, multimode Procedure happened in experiment in the event the sizing of the pump beam is greater than TEM00 cavity method and it triggers bigger CW output energy while in the displacement area down below three.five mm.
For tungstates, the ytterbium doping concentration can be extremely higher devoid of substantial quenching since the changed ions have a really related ion radius, plus the inter-ion distance is comparatively massive.
Higher-electric power repetitively pulsed ytterbium lasers with supershort pulse width and immediate diode pumping for technological and biomedical applications
Whilst ytterbium-doped laser obtain media commonly show a little quantum defect, ytterbium-doped tungstates let for specially smaller values. Such as, a 1030-nm Yb:YAG laser would Ordinarily be pumped all over 940 nm, While Yb:KGW or Yb:KYW may be most efficiently pumped around 981 nm.
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Request RP Photonics for just about any suggestions concerning tungstate lasers, including femtosecond lasers and large-ability lasers.