Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is rather big compared with that of Yb:YAG. This permits for huge wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values well beneath 100 fs are already obtained with passive method locking.
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Femtosecond laser based on Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the heartbeat
FIG. 4. Autocorrelation purpose of the pulse 共a兲and spectrum 共b兲of the laser with a rectangular Energetic factor for an output power of seven-hundred mW. The width of
Optical layout of the laser with direct pumping Along with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output from the radiation, WP can be a 50 %-wave plate, CL is a collimating lens, FL can be a focusing lens, AE can be an Lively component made out of an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 would be the cavity mirrors, OC could be the output mirror, and SAM is actually a semiconductor saturable-absorber mirror.
The monoclinic crystal structures ends in a normal birefringence, helping to keep away from thermally induced polarization rotation and depolarization decline.
Raman, luminescence and transmission spectra reveal optical functions owing to your existence of thulium ions, and as a consequence the materials might be more researched inside the scope of laser and luminescence programs.
Spatial construction from the beam and also the corresponding depth profiles I within the output with the laser.
For tungstates, the ytterbium doping focus can be extremely large without the need of considerable quenching as the changed ions have an extremely identical ion radius, and also the inter-ion distance is fairly significant.
By substituting yttrium read more with ytterbium within the crystal lattice of Yb:KYW because of the comparable dimensions of those chemical components up to a hundred% of Yb-doping could possibly be accomplished.
The thermal conductivity of prevalent double tungstates is of the purchase to three–four W/(K m) �?which is not bad in comparison with other laser crystals (Though several periods under for YAG), and quite massive as opposed Using the thermal conductivity of standard Eyeglasses.
Li2WO4-WO3 flux was efficiently utilized reducing the growth temperature under 900 oC. According to single crystal x-ray measurements, the crystal corresponds for the P2/n Place team.
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Concurrently, a shorter laser wavelength is often acquired; it is possible to function using a quantum defect well under 1%. As a consequence, the warmth generation might be so little this partly compensates the reduce thermal conductivity.