Top Guidelines Of KYW Crystal
Top Guidelines Of KYW Crystal
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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 large wavelength tunability and for A lot shorter pulse durations from method-locked lasers. Values properly underneath a hundred fs have been accomplished with passive mode locking.
This unique characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at reduced overall publicity, and drives applications which include deep-tissue multiphoton microscopy and substantial-precision eye surgical treatment
time. Crystals with the compound melts congruently at 1007 oC, even so melt crystallization of top of the range crystal is not possible due to period transition at ~920 oC. The highest seeded Answer process from
The absorption and emission spectra of Yb:KYW Crystals display powerful peaks at 980 nm and 1030 nm, respectively, making certain productive Strength conversion and significant general performance in laser programs.
Optical layout of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output of your radiation, WP is often a half-wave plate, CL is often a collimating lens, FL is actually a concentrating lens, AE is definitely an Energetic aspect produced from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 would be the cavity mirrors, OC is the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
The monoclinic crystal structures brings about a natural birefringence, helping to avoid thermally induced polarization rotation and depolarization decline.
FIG. 1. Optical structure of a laser with direct pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
5 mm in addition to the middle from the beam caustic. So that you can Look at the method matching simulation, we carried out the experiment with Ng-Lower crystal oscillator, which was designed Beforehand and in a same affliction with simulation [11]. As demonstrated in Figure 3(b) with red dots and line, the CW output power is highly dependent on the placement of laser crystal along with the experimental end result coincides well with simulation result. Like a note, multimode Procedure transpired in experiment once the sizing from the pump beam is much larger than TEM00 cavity mode and get more info it triggers better CW output energy while in the displacement area down below three.five mm.
For tungstates, the ytterbium doping concentration can be quite superior without having sizeable quenching because the replaced ions have an exceptionally very similar ion radius, as well as the inter-ion length is relatively massive.
Nonetheless, the moment Nd3+:YAG turned commercially out there, the fascination in CaWO4 dropped sharply. In later yrs, specified other tungstate crystals started to appeal to loads of consideration.
The thermal conductivity of typical double tungstates is of the buy to three–4 W/(K m) �?which isn't poor as opposed with other laser crystals (Though quite a few instances fewer than for YAG), and relatively significant in contrast Along with the thermal conductivity of typical glasses.
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At the same time, a shorter laser wavelength is usually obtained; it is achievable to operate which has a quantum defect very well beneath one%. As being a consequence, the warmth generation is often so tiny this partly compensates the reduce thermal conductivity.