The KYW Crystal Diaries
The KYW Crystal Diaries
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This exclusive attribute of ultrafast pulses enables nonlinear optical interaction with tissue at lower overall exposure, and drives purposes including deep-tissue multiphoton microscopy and significant-precision eye surgical treatment
We present a dual-crystal Yb:KGW laserthat iscapable to work like a Q-switched oscillator with output electricity as many as 24 W and pulse duration of 20 ns,or as a regenerative amplifier with output energy as many as 21 W and pulse length down below two hundred fs just after compression of chirped pulses. Both lasers have exceptional beam top quality with beam parameter M2
Coloration-coded reflectivity of the Bragg mirror being a purpose of wavelength and angle from the incident beam.
Ultrafast lasers, with pulse widths of a few picoseconds (10−twelve s) or a lot less, enable enough time resolution demanded in laser-enthusiastic fluorescence lifetime spectroscopy and imaging approaches.Furthermore, they supply large pulse peak powers at higher repetition charges and reasonable common output powers.
Just before the event of Nd:YAG, Nd3+:CaWO4 was a vital scarce-earth-doped laser get medium. It absolutely was in truth Utilized in the primary repeatedly working crystal laser.
Raman, luminescence and transmission spectra reveal optical options owing towards the presence of thulium ions, and so the elements can be further more analyzed within the scope of laser and luminescence programs.
Tungstates are likely to own higher Raman coefficients (�?Raman scattering). Hence, they could generate considerable Raman attain at moderate optical intensities. It is achievable to utilize the laser crystal alone as a Raman converter.
... at 50 percent-height ended up generated inside of a grasp oscillator with selfsynchronization of your axial modes, described in our before report. 21 The new version with the laser, contrary to that described in our previously short article, utilised an Yb:KYW crystal having an N pcut (optical axis N p on the index ellipsoid was parallel on the propagation direction of the laser radiation), with the polarization with the produced radiation directed together the N m axis.
Nevertheless, the moment Nd3+:YAG became commercially readily available, the interest in CaWO4 dropped sharply. In later several years, certain other tungstate crystals started to bring in a lot of awareness.
Although ytterbium-doped laser get media frequently exhibit a small quantum defect, ytterbium-doped tungstates allow for particularly small values. As an example, a more info 1030-nm Yb:YAG laser would Generally be pumped all around 940 nm, While Yb:KGW or Yb:KYW may be most successfully pumped all around 981 nm.
This tandem of attributes has significantly-reaching implications, especially in the development of compact however powerfull lasers.
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