Detailed Notes on KYW Crystal
Detailed Notes on KYW Crystal
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is quite substantial when compared with that of Yb:YAG. This enables for broad wavelength tunability and for much shorter pulse durations from manner-locked lasers. Values perfectly underneath 100 fs are reached with passive mode locking.
The comparison with Eyeglasses is acceptable Considering that the significant get bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
We current a dual-crystal Yb:KGW laserthat iscapable to function as a Q-switched oscillator with output ability nearly 24 W and pulse size of twenty ns,or like a regenerative amplifier with output ability up to 21 W and pulse duration underneath 200 fs just after compression of chirped pulses. Both equally lasers have fantastic beam excellent with beam parameter M2
Coloration-coded reflectivity of the Bragg mirror like a functionality of wavelength and angle on the incident beam.
This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by powerful linear arrays of semiconductor injection lasers owning fiber output. To stop spectral narrowing throughout amplification as well as corresponding lengthening in the amplified pulse when it's compressed, a combination of two Yb:KYW crystals ended up utilised, With all the spectral maxima of the amplification shifted relative to each other and with spectral profiling of your amplified radiation.
Soon after air drying and subsequent cleaning with a cotton cloth soaked in Alcoholic beverages, the movie surface showed no signs of peeling or scratches.
FIG. 1. Optical structure of a laser with immediate pumping Using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
Tungstates are inclined to obtain large Raman coefficients (�?Raman scattering). For that reason, they are able to create sizeable Raman acquire at moderate optical intensities. It is possible to utilize the laser crystal itself like a Raman converter.
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By substituting yttrium with ytterbium during the crystal click here lattice of Yb:KYW due to identical sizes of these chemical factors around one hundred% of Yb-doping could be realized.
While ytterbium-doped laser gain media normally show a small quantum defect, ytterbium-doped tungstates let for particularly modest values. Such as, a 1030-nm Yb:YAG laser would Ordinarily be pumped all over 940 nm, While Yb:KGW or Yb:KYW may be most proficiently pumped all-around 981 nm.
This tandem of characteristics has far-reaching implications, significantly in the development of compact but powerfull lasers.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison with its counterpart Yb:KGW, is really a remarkable substance that performs an important purpose in laser engineering. Its Principal function is always to make ultrashort pulses of light, spanning just some hundred femtoseconds.
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