KYW Crystal Secrets
KYW Crystal Secrets
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW may be very massive in contrast with that of Yb:YAG. This enables for wide wavelength tunability and for Considerably shorter pulse durations from mode-locked lasers. Values properly below 100 fs have been reached with passive manner locking.
The comparison with Eyeglasses is suitable For the reason that massive achieve bandwidth makes it possible for e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We existing a twin-crystal Yb:KGW laserthat iscapable to operate like a Q-switched oscillator with output power around 24 W and pulse length of twenty ns,or like a regenerative amplifier with output power as many as 21 W and pulse length below 200 fs after compression of chirped pulses. Both of those lasers have fantastic beam high-quality with beam parameter M2
FIG. 4. Autocorrelation perform of the heartbeat 共a兲and spectrum 共b兲of the laser with an oblong Lively element for an output energy of seven-hundred mW. The width of
Optical structure of a laser with immediate pumping Using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output in the radiation, WP is usually a 50 percent-wave plate, CL can be a collimating lens, FL is actually a concentrating lens, AE is undoubtedly an active factor produced from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 are classified as the cavity mirrors, OC is the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
Ahead of the event of Nd:YAG, Nd3+:CaWO4 was a very important unusual-earth-doped laser gain medium. It had been in fact Utilized in the main constantly functioning crystal laser.
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Tungstates have a tendency to acquire substantial Raman coefficients (�?Raman scattering). Hence, they're able to make sizeable Raman attain at moderate optical intensities. It is achievable to make use of the laser crystal by itself being a Raman converter.
... at 50 %-height were being created in the learn oscillator with selfsynchronization of the axial modes, described within our earlier post. 21 The new edition with the laser, in contrast to that described in our earlier article, used an Yb:KYW crystal with the N pcut (optical axis N p in the index ellipsoid was parallel for the propagation way on the laser radiation), While using the polarization of your generated radiation directed alongside the N m axis.
Superior-electric power repetitively pulsed ytterbium lasers with supershort pulse width and direct diode pumping for technological and biomedical purposes
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