The KYW Crystal Diaries
The KYW Crystal Diaries
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The comparison with Eyeglasses is acceptable Considering that the massive acquire bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
time. Crystals from the compound melts congruently at 1007 oC, however soften crystallization of top quality crystal is difficult because of stage transition at ~920 oC. The best seeded Resolution technique from
FIG. four. Autocorrelation functionality of the pulse 共a兲and spectrum 共b兲of the laser with an oblong Energetic aspect for an output electric power of 700 mW. The width of
Optical format of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output with the radiation, WP is often a fifty percent-wave plate, CL is actually a collimating lens, FL is really a concentrating lens, AE is undoubtedly an active ingredient created from an Yb:KYW crystal, DM is actually a spherical dichroic mirror, M1-M6 are classified as the cavity mirrors, OC would be the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
The monoclinic crystal buildings results in a normal birefringence, helping to stay clear of thermally induced polarization rotation and depolarization reduction.
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Tungstates are inclined to own large Raman coefficients (�?Raman scattering). For that reason, they can deliver considerable Raman acquire at moderate optical intensities. It is achievable to use the laser crystal by itself for a Raman converter.
For tungstates, the ytterbium doping focus can be very higher devoid of substantial quenching because the changed ions have an exceedingly related ion radius, along with the inter-ion distance is pretty huge.
Significant-ability repetitively pulsed ytterbium lasers with supershort pulse width and direct diode pumping for technological and biomedical apps
The thermal conductivity of popular double tungstates is of your get to three–four W/(K m) �?which isn't terrible as opposed with other laser crystals (While a number of moments less than for YAG), and reasonably massive when compared Using the thermal conductivity of typical glasses.
Li2WO4-WO3 flux was efficiently used reducing The expansion temperature beneath 900 oC. According click here to solitary crystal x-ray measurements, the crystal corresponds towards the P2/n House group.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at room temperature were measured. The emission spectrum and life span in the 3 File four energized point out were determined. Applying normal and modified Judd–Ofelt theories, the intensity parameters and the radiative lifetimes ended up calculated and excellent agreement Together with the experimental benefits was received for both equally theories.
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