The Definitive Guide to KYW Crystal
The Definitive Guide to KYW Crystal
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is quite substantial compared with that of Yb:YAG. This allows for extensive wavelength tunability and for Substantially shorter pulse durations from manner-locked lasers. Values well beneath 100 fs are achieved with passive mode locking.
This exclusive characteristic of ultrafast pulses allows nonlinear optical conversation with tissue at low overall exposure, and drives programs which include deep-tissue multiphoton microscopy and superior-precision eye operation
The Yb:KYW crystal’s proficiency in gentle absorption at about 981 nm will make the crystal well matched for diode pumping. It really is more Increased by its extraordinary effectiveness in this process, coupled with its reduced quantum defect.
Color-coded reflectivity of a Bragg mirror like a operate of wavelength and angle with the incident beam.
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW as a result of identical sizes of these chemical factors as many as a hundred% of Yb-doping could be attained. This exceptional characteristic permits ytterbium to take the location of yttrium with practically no disruption towards the crystal’s lattice.
Adhesion Check Compliant with MIL-C-675C armed service standards, an adhesion check concerned applying a tape that meets LT-90 specs onto the lens film layer. The tape was affixed fully and after that eliminated vertically. This method was carried out thrice, resulting in no blistering or peeling.
FIG. one. Optical layout of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
Tungstates are likely to have substantial Raman coefficients (�?Raman scattering). Thus, they can make important Raman get at average optical intensities. It is feasible to make use of the laser crystal alone for a Raman converter.
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... Not only the place of crystal in the cavity but also the amplification axis of crystal affects the laser operation significantly, because the absorption and emission cross sections from the crystal are fairly distinct according to the orientation of the crystal.
The thermal conductivity of frequent double tungstates is read more of the buy to three–4 W/(K m) �?which isn't lousy compared with other laser crystals (While numerous instances a lot less than for YAG), and quite huge as opposed With all the thermal conductivity of usual glasses.
Li2WO4-WO3 flux was successfully applied reducing the growth temperature down below 900 oC. In line with one crystal x-ray measurements, the crystal corresponds on the P2/n Room group.
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Concurrently, a shorter laser wavelength could be attained; it is feasible to operate which has a quantum defect well underneath one%. Being a consequence, the heat technology is usually so modest this partly compensates the lower thermal conductivity.