The KYW Crystal Diaries
The KYW Crystal Diaries
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly substantial as opposed with that of Yb:YAG. This permits for wide wavelength tunability and for A lot shorter pulse durations from method-locked lasers. Values very well underneath one hundred fs are realized with passive manner locking.
This distinctive characteristic of ultrafast pulses allows nonlinear optical conversation with tissue at minimal Total publicity, and drives purposes like deep-tissue multiphoton microscopy and higher-precision eye medical procedures
Femtosecond laser dependant on Yb:KYW crystals with suppression of spectral narrowing in a very regenerative amplifier by spectral profiling of the pulse
FIG. four. Autocorrelation operate of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular Lively element for an output electrical power of seven hundred mW. The width of
Optical layout of a laser with immediate pumping with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output on the radiation, WP is really a 50 percent-wave plate, CL is really a collimating lens, FL is often a concentrating lens, AE can be an Lively aspect comprised of an Yb:KYW crystal, DM is a spherical dichroic mirror, M1-M6 are classified as the cavity mirrors, OC could be the output mirror, and SAM is actually a semiconductor saturable-absorber mirror.
Adhesion Exam Compliant with MIL-C-675C armed service criteria, an adhesion take a look at concerned implementing a tape that meets LT-90 requirements on to the lens movie layer. The tape was affixed entirely after which eliminated vertically. This procedure was executed 3 times, resulting in no blistering or peeling.
Raman, luminescence and transmission spectra reveal optical attributes owing for the presence of thulium ions, and as a consequence the materials can be further more researched from the scope of laser and luminescence programs.
Spatial composition check here of your beam as well as corresponding intensity profiles I at the output from the laser.
... at 50 %-height had been produced inside of a master oscillator with selfsynchronization in the axial modes, explained within our before post. 21 The new version on the laser, compared with that described in our earlier short article, made use of an Yb:KYW crystal with an N pcut (optical axis N p from the index ellipsoid was parallel towards the propagation path in the laser radiation), Together with the polarization on the generated radiation directed together the N m axis.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW because of the very similar dimensions of these chemical factors as many as a hundred% of Yb-doping can be realized.
The thermal conductivity of typical double tungstates is in the purchase to 3–4 W/(K m) �?which isn't lousy compared with other laser crystals (although a number of times under for YAG), and pretty large as opposed Together with the thermal conductivity of standard glasses.
Li2WO4-WO3 flux was effectively used cutting down the growth temperature below 900 oC. In keeping with 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 area temperature were being measured. The emission spectrum and lifetime in the 3 File four fired up state were established. Applying typical and modified Judd–Ofelt theories, the intensity parameters and the radiative lifetimes had been calculated and great settlement While using the experimental effects was attained for each theories.
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