The Single Best Strategy To Use For KYW Crystal
The Single Best Strategy To Use For KYW Crystal
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is extremely substantial in contrast with that of Yb:YAG. This permits for large wavelength tunability and for Significantly shorter pulse durations from manner-locked lasers. Values perfectly below one hundred fs are actually reached with passive manner locking.
The comparison with Eyeglasses is appropriate since the large gain bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
We present a twin-crystal Yb:KGW laserthat iscapable to operate being a Q-switched oscillator with output electricity up to 24 W and pulse size of 20 ns,or as a regenerative amplifier with output energy up to 21 W and pulse length underneath 200 fs immediately after compression of chirped pulses. Both equally lasers have superb beam top quality with beam parameter M2
FIG. 4. Autocorrelation functionality of the pulse 共a兲and spectrum 共b兲of a laser with an oblong Energetic aspect for an output energy of 700 mW. The width of
Optical structure of the laser with direct pumping Together with the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output in the radiation, WP is a fifty percent-wave plate, CL is actually a collimating lens, FL can be a focusing lens, AE is an Lively aspect created from an Yb:KYW crystal, DM is really a spherical dichroic mirror, M1-M6 tend to be the cavity mirrors, OC would be the output mirror, and SAM is really a semiconductor saturable-absorber mirror.
Prior to the development of Nd:YAG, Nd3+:CaWO4 was a vital rare-earth-doped laser achieve medium. It absolutely was actually Utilized in the initial continuously working crystal laser.
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five mm other than the middle in the beam caustic. In order to Check out the manner matching simulation, we carried out the experiment with Ng-Slash crystal oscillator, which was produced click here Beforehand and in a similar condition with simulation [11]. As revealed in Figure 3(b) with purple dots and line, the CW output power is extremely depending on the place of laser crystal plus the experimental result coincides perfectly with simulation result. For a note, multimode operation transpired in experiment in the event the size on the pump beam is larger sized than TEM00 cavity mode and it triggers bigger CW output electrical power from the displacement location below 3.5 mm.
For tungstates, the ytterbium doping focus can be extremely large without having significant quenching as the replaced ions have a really identical ion radius, plus the inter-ion distance is pretty massive.
... Don't just the posture of crystal during the cavity but also the amplification axis of crystal affects the laser Procedure enormously, as the absorption and emission cross sections with the crystal are rather unique in accordance with the orientation on the crystal.
When ytterbium-doped laser achieve media commonly exhibit a small quantum defect, ytterbium-doped tungstates allow for for specifically small values. By way of example, a 1030-nm Yb:YAG laser would normally be pumped all around 940 nm, whereas Yb:KGW or Yb:KYW could possibly be most competently pumped all around 981 nm.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at place temperature ended up calculated. The emission spectrum and life span of your 3 File four excited state had been established. Utilizing standard and modified Judd–Ofelt theories, the depth parameters along with the radiative lifetimes have been calculated and great settlement While using the experimental outcomes was received for both of those theories.
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