Indicators on KGW Crystal You Should Know
Indicators on KGW Crystal You Should Know
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Former perform confirmed that the twin-crystal configuration may be used to compensate to the thermal lensing influence[
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is very huge in contrast with that of Yb:YAG. This permits for large wavelength tunability and for Substantially shorter pulse durations from manner-locked lasers. Values nicely down below 100 fs are already reached with passive method locking.
Concurrently, a shorter laser wavelength could be acquired; it can be done to work having a quantum defect perfectly underneath one%. As being a consequence, the heat era could be so smaller this partly compensates the decrease thermal conductivity.
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For tungstates, the ytterbium doping concentration can be very large with no substantial quenching since the replaced ions have an exceptionally very similar ion radius, plus the inter-ion distance is comparatively big.
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KGW (potassium gadolinium tungstate) is often a crystal that is usually used to be a Raman crystal in Raman spectroscopy. It's really a colorless, clear crystal which has a higher Raman scattering performance and a solid Raman spectrum, rendering it suited to A variety of Raman applications.
Thermal results are noticeably lesser in KGW. This together with the large harm threshold make the crystal an excellent prospect for electric power scaling. Comparing Ba(NO3)two and KGW for Raman application Ba(NO3)two are more practical in the event of ns pulses and KGW �?in case of ps pulses.
Figure 4 Beam radius variation on The 2 crystals whilst altering the focal length website of your thermal lensing outcome.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The input of the stretcher (incident angle: fifty two°) Which on the compressor incident within the grating had been within the exact facet; that's why, a slight angular tuning from the grating could be designed to acquire the most beneficial compression consequence. During the compressor, the enter angle about the grating and the distance between the interpretation phase (S1) plus the transmission grating (TG) ended up meant to compensate for the stretcher dispersion and all dispersion released via the components.
Tungstates are likely to obtain significant Raman coefficients (�?Raman scattering). Consequently, they're able to deliver major Raman obtain at average optical intensities. It is possible to use the laser crystal itself as being a Raman converter.
Figure 8 Intra-cavity pulse amplification process monitored by an oscilloscope. The heartbeat underwent an unsaturated amplification due to mirror problems limitation.
]. The dual-crystal configuration lowers the thermal load on Just about every crystal while sustaining a large obtain, and facilitates the compensation of every one’s thermal lensing result. Thus, the laser cavity can perform with a significant stability vary about the thermal lensing result variation.