5 Easy Facts About KYW Crystal Described
5 Easy Facts About KYW Crystal Described
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The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is extremely massive in contrast with that of Yb:YAG. This allows for broad wavelength tunability and for A lot shorter pulse durations from mode-locked lasers. Values properly beneath a hundred fs have been attained with passive method locking.
The comparison with glasses is appropriate For the reason that substantial gain bandwidth permits e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We current a dual-crystal Yb:KGW laserthat iscapable to work for a Q-switched oscillator with output energy approximately 24 W and pulse size of 20 ns,or for a regenerative amplifier with output electricity around 21 W and pulse period underneath two hundred fs immediately after compression of chirped pulses. Equally lasers have superb beam quality with beam parameter M2
Color-coded reflectivity of the Bragg mirror as a operate of wavelength and angle with the incident beam.
Optical layout of the laser with immediate pumping With all the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output of your radiation, WP is a half-wave plate, CL is a collimating lens, FL is really a focusing lens, AE is an Lively ingredient comprised of an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 tend to be the cavity mirrors, OC will be the output mirror, and SAM is actually a semiconductor saturable-absorber mirror.
The monoclinic crystal buildings brings about a natural birefringence, helping to steer clear of thermally induced polarization rotation and depolarization reduction.
Raman, luminescence and transmission spectra reveal optical features owing to your presence of thulium ions, and therefore the elements could possibly be further analyzed within the scope of laser and luminescence purposes.
Tungstates tend to obtain large Raman coefficients (�?Raman scattering). Thus, they might generate substantial Raman achieve at reasonable optical intensities. It is achievable to utilize the laser crystal alone to be a Raman converter.
For tungstates, the ytterbium doping concentration can be very high without the need of major quenching since the replaced ions have a very identical ion radius, along with the inter-ion distance is relatively massive.
... Don't just the situation of crystal inside the cavity but additionally the amplification axis of crystal affects the laser Procedure tremendously, because the absorption and emission cross sections on the crystal are really distinct based on the orientation in the crystal.
When ytterbium-doped laser gain media usually exhibit a little quantum defect, ytterbium-doped tungstates permit for notably small values. Such as, a 1030-nm Yb:YAG laser would Usually be pumped about 940 nm, whereas Yb:KGW or Yb:KYW could be most successfully pumped all around 981 nm.
This tandem of characteristics has much-achieving implications, notably in the development of compact but powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at room check here temperature ended up measured. The emission spectrum and life time from the three File 4 psyched condition were being established. Applying normal and modified Judd–Ofelt theories, the depth parameters and also the radiative lifetimes ended up calculated and great arrangement with the experimental benefits was attained for each theories.
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