KYW Crystal - An Overview
KYW Crystal - An Overview
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This one of a kind characteristic of ultrafast pulses allows nonlinear optical conversation with tissue at lower overall exposure, and drives programs for instance deep-tissue multiphoton microscopy and substantial-precision eye surgery
We current a dual-crystal Yb:KGW laserthat iscapable to function for a Q-switched oscillator with output ability up to 24 W and pulse duration of twenty ns,or like a regenerative amplifier with output ability approximately 21 W and pulse duration underneath 200 fs soon after compression of chirped pulses. The two lasers have fantastic beam quality with beam parameter M2
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Optical format of the laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output from the radiation, WP is often a half-wave plate, CL is actually a collimating lens, FL is often a concentrating lens, AE is definitely an Energetic factor constructed from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 are the cavity mirrors, OC will be the output mirror, and SAM is a semiconductor saturable-absorber mirror.
Immediately after air drying and subsequent cleansing which has a cotton fabric soaked in Alcoholic beverages, the film surface showed no indications of peeling or scratches.
FIG. one. Optical format of the laser with immediate pumping While using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
5 mm in addition to the middle from the beam caustic. In an effort to Test the method matching simulation, we executed the experiment with Ng-Slice crystal oscillator, which was designed Beforehand As well as in a identical affliction with simulation [eleven]. As revealed in Figure 3(b) with pink dots and line, the CW output electrical power is extremely dependent on the placement of laser crystal plus the experimental end result coincides very well with simulation end result. Like a note, multimode operation happened in experiment if the measurement in the pump beam is much larger than TEM00 cavity manner and it leads to higher CW more info output energy while in the displacement area below three.five mm.
For tungstates, the ytterbium doping focus can be very large without important quenching because the replaced ions have a really very similar ion radius, and the inter-ion length is fairly substantial.
Nevertheless, when Nd3+:YAG became commercially out there, the desire in CaWO4 dropped sharply. In afterwards yrs, certain other tungstate crystals began to appeal to loads of consideration.
Though ytterbium-doped laser obtain media generally exhibit a small quantum defect, ytterbium-doped tungstates enable for especially compact values. One example is, a 1030-nm Yb:YAG laser would Commonly be pumped close to 940 nm, Whilst Yb:KGW or Yb:KYW could possibly be most effectively pumped close to 981 nm.
Li2WO4-WO3 flux was properly utilized minimizing The expansion temperature under 900 oC. In keeping with one crystal x-ray measurements, the crystal corresponds to your P2/n space group.
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Concurrently, a shorter laser wavelength might be attained; it is possible to function using a quantum defect well down below one%. Being a consequence, the warmth generation is usually so tiny that this partly compensates the lower thermal conductivity.