KYW Crystal - An Overview
KYW Crystal - An Overview
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The comparison with glasses is suitable Because the large acquire bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
The Yb:KYW crystal’s proficiency in gentle absorption at all over 981 nm would make the crystal compatible for diode pumping. It truly is further more enhanced by its outstanding performance in this method, coupled with its minimal quantum defect.
Shade-coded reflectivity of the Bragg mirror as being a operate of wavelength and angle of your incident beam.
This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers owning fiber output. To avoid spectral narrowing throughout amplification as well as corresponding lengthening on the amplified pulse when it's compressed, a mix of two Yb:KYW crystals had been applied, Together with the spectral maxima of your amplification shifted relative to each other and with spectral profiling on the amplified radiation.
Right before the development of Nd:YAG, Nd3+:CaWO4 was an important exceptional-earth-doped laser gain medium. It absolutely was in truth Employed in the very first continually running crystal laser.
FIG. 1. Optical layout of a laser with immediate pumping with the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
Tungstates tend to get substantial Raman coefficients (�?Raman scattering). Thus, they might generate significant Raman acquire at moderate optical intensities. It can be done to use the laser crystal itself as being a Raman converter.
For tungstates, the ytterbium doping concentration can be extremely significant with no considerable quenching because the changed ions have an incredibly comparable ion radius, and also the inter-ion length is pretty large.
... Don't just the situation of crystal within the cavity but will also the amplification axis of crystal influences the laser operation greatly, because the absorption and emission cross sections of the crystal are fairly different in accordance with the orientation on the crystal.
The thermal conductivity of frequent double tungstates is in the purchase to 3–4 W/(K m) �?which isn't terrible as opposed with other laser crystals (Even though a number of moments fewer than for YAG), and fairly massive in contrast Along with the thermal conductivity of normal glasses.
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