An Unbiased View of KYW Crystal
An Unbiased View of KYW Crystal
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is rather substantial as opposed with that of Yb:YAG. This enables for huge wavelength tunability and for Substantially shorter pulse durations from method-locked lasers. Values perfectly underneath a hundred fs are actually obtained with passive manner locking.
This unique attribute of ultrafast pulses enables nonlinear optical interaction with tissue at very low In general publicity, and drives applications including deep-tissue multiphoton microscopy and substantial-precision eye surgical procedures
We current a twin-crystal Yb:KGW laserthat iscapable to operate like a Q-switched oscillator with output energy up to 24 W and pulse duration of 20 ns,or like a regenerative amplifier with output power nearly 21 W and pulse period below two hundred fs after compression of chirped pulses. The two lasers have fantastic beam excellent with beam parameter M2
FIG. four. Autocorrelation operate of the heart beat 共a兲and spectrum 共b兲of a laser with a rectangular Energetic aspect for an output ability of 700 mW. The width of
Optical structure of the laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output in the radiation, WP can be a half-wave plate, CL is really a collimating lens, FL is really a concentrating lens, AE can be an active component made from an Yb:KYW crystal, DM is a spherical dichroic mirror, M1-M6 are the cavity mirrors, OC would be the output mirror, and SAM is often a semiconductor saturable-absorber mirror.
Adhesion Take a look at Compliant with MIL-C-675C military services requirements, an adhesion examination included implementing a tape that satisfies LT-ninety specifications onto the lens film layer. The tape was affixed totally then taken off vertically. This procedure was performed three times, resulting in no blistering or peeling.
Raman, luminescence and transmission spectra reveal optical attributes owing to the existence of thulium ions, and thus the materials may very well be more examined while in the scope of laser and luminescence applications.
Spatial construction from the beam as well as the corresponding intensity profiles I with the output on the laser.
... at 50 %-height ended up generated in the grasp oscillator with selfsynchronization from the axial modes, explained within our before write-up. 21 The new edition from the laser, contrary to that described within our previously article, employed an Yb:KYW crystal having an N pcut (optical axis N p from the index ellipsoid was parallel on the propagation way from the laser radiation), Along with the polarization of the generated radiation directed alongside the N m axis.
... Not only the position of crystal within the cavity but additionally the amplification axis of crystal impacts the laser operation tremendously, because the absorption and emission cross sections from the crystal are fairly various according to the orientation of the crystal.
Even though ytterbium-doped laser acquire media commonly exhibit a little quantum defect, ytterbium-doped tungstates enable for significantly tiny values. Such as, a 1030-nm Yb:YAG laser would Typically be pumped all-around 940 nm, whereas Yb:KGW or Yb:KYW may be most efficiently pumped close to 981 nm.
This tandem of attributes has much-reaching implications, notably in the development of compact nonetheless powerfull lasers.
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Concurrently, a shorter laser wavelength could be received; it is achievable to work that has a quantum defect properly underneath one%. Like a consequence, the warmth technology might be so compact that this partly compensates the lessen thermal conductivity.