Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is actually a impressive materials that plays a crucial position in laser engineering. Its Key purpose would be to produce ultrashort pulses of light, spanning just a few hundred femtoseconds.
The Yb:KYW crystal’s proficiency in light absorption at all over 981 nm tends to make the crystal compatible for diode pumping. It is actually more Increased by its outstanding efficiency in this process, coupled with its minimal quantum defect.
The absorption and emission spectra of Yb:KYW Crystals Display screen robust peaks at 980 nm and 1030 nm, respectively, ensuring successful Electricity conversion and significant performance in laser methods.
Optical structure of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output in the radiation, WP is often a 50 %-wave plate, CL is usually a collimating lens, FL is a focusing lens, AE is definitely an Lively ingredient constructed from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC would be the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
Adhesion Test Compliant with MIL-C-675C army requirements, an adhesion test associated making use of a tape that meets LT-ninety requirements onto the lens film layer. The tape was affixed fully and then removed vertically. This course of action was done 3 times, resulting in no blistering or peeling.
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Tungstates tend to get substantial Raman coefficients (�?Raman scattering). Thus, they might deliver significant Raman gain at average optical intensities. It is achievable to use the laser crystal itself as being a Raman converter.
For tungstates, the ytterbium doping focus can be quite high with no sizeable quenching because more info the replaced ions have an exceptionally similar ion radius, along with the inter-ion length is pretty large.
By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW due to comparable sizes of those chemical aspects nearly 100% of Yb-doping may be attained.
The thermal conductivity of typical double tungstates is on the buy to three–four W/(K m) �?which is not negative when compared with other laser crystals (Whilst a number of times a lot less than for YAG), and relatively significant as opposed While using the thermal conductivity of usual Eyeglasses.
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