KYW Crystal No Further a Mystery
KYW Crystal No Further a Mystery
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is extremely large in contrast with that of Yb:YAG. This enables for vast wavelength tunability and for Substantially shorter pulse durations from manner-locked lasers. Values nicely underneath one hundred fs are actually obtained with passive manner locking.
This special characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at reduced In general exposure, and drives purposes which include deep-tissue multiphoton microscopy and large-precision eye medical procedures
The Yb:KYW crystal’s proficiency in mild absorption at all around 981 nm will make the crystal compatible for diode pumping. It really is additional Increased by its remarkable performance in this process, coupled with its small quantum defect.
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Optical layout of the laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output of the radiation, WP is often a fifty percent-wave plate, CL is often a collimating lens, FL is really a concentrating lens, AE is definitely an Energetic ingredient created from an Yb:KYW crystal, DM is usually a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC could be the output mirror, and SAM is really a semiconductor saturable-absorber mirror.
Adhesion Test Compliant with MIL-C-675C armed forces criteria, an adhesion exam involved applying a tape that meets LT-90 specs onto the lens film layer. The tape was affixed thoroughly after which you can removed vertically. This procedure was performed thrice, causing no blistering or peeling.
Raman, luminescence and transmission spectra reveal optical characteristics owing to your existence of thulium ions, and as a consequence the supplies could possibly be even more analyzed while in the scope of laser and luminescence apps.
5 mm apart from the middle with the beam caustic. So that you can Test the method matching simulation, we performed the experiment with Ng-cut crystal oscillator, which was made Earlier and in a exact affliction with simulation [11]. As revealed in Figure 3(b) with red dots and line, the CW output electric power is highly depending on the place of laser crystal and the experimental consequence coincides very well with simulation end result. To be a Take note, multimode operation happened in experiment in the event the size in the pump beam is greater than TEM00 cavity manner and it results in bigger CW output electric power in the displacement region down below three.five mm.
... at half-top were being produced within a master oscillator with selfsynchronization of your axial modes, explained in our before short article. 21 The new edition on the laser, not like that described inside our earlier short article, utilised an Yb:KYW crystal with the N pcut (optical axis N p of your index ellipsoid was parallel for the propagation direction on the laser radiation), With all the polarization on the created radiation directed along the N m axis.
... Not only the position of crystal inside the cavity but in addition the amplification axis of crystal influences the laser operation tremendously, as the absorption and emission cross sections with the crystal are pretty diverse based on the orientation in the crystal.
The thermal conductivity of frequent double tungstates is of the buy to 3–4 W/(K m) �?which isn't undesirable in contrast with other laser crystals (Whilst numerous times fewer than for YAG), and reasonably large in comparison Together with the thermal conductivity of usual glasses.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at area temperature were being measured. The emission spectrum and lifetime on the three File four excited state have been decided. Using regular and modified Judd–Ofelt theories, the intensity parameters and the radiative lifetimes had been calculated and great arrangement Along with the experimental success was attained for both of those theories.
At the same time, a shorter laser wavelength is usually received; it is feasible to operate that has a quantum defect properly beneath one%. Like a consequence, the warmth era can be so smaller that this partly compensates the decreased thermal conductivity.