KYW Crystal Options
KYW Crystal Options
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The comparison with glasses is suitable For the reason that significant gain bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
Femtosecond laser dependant on Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the heartbeat
Shade-coded reflectivity of the Bragg mirror as a operate of wavelength and angle with the incident beam.
This paper describes a femtosecond laser regenerative amplifier based upon two Yb:KYW crystals with direct longitudinal pumping by strong linear arrays of semiconductor injection lasers obtaining fiber output. To prevent spectral narrowing all through amplification plus the corresponding lengthening on the amplified pulse when it is compressed, a mix of two Yb:KYW crystals had been made use of, Using the spectral maxima in the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
Adhesion Exam Compliant with MIL-C-675C armed forces requirements, an adhesion check involved applying a tape that satisfies LT-90 specifications onto the lens film layer. The tape was affixed completely and afterwards taken off vertically. This process was executed thrice, leading to no blistering or peeling.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are applied as lasing check here elements to make ultrashort (~ one hundred-two hundred fs) higher electricity pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser units.
Tungstates tend to possess substantial Raman coefficients (�?Raman scattering). Thus, they might generate considerable Raman obtain at reasonable optical intensities. It is achievable to make use of the laser crystal itself like a Raman converter.
For tungstates, the ytterbium doping focus can be quite higher without major quenching since the replaced ions have an exceptionally related ion radius, and also the inter-ion length is comparatively large.
... Not merely the placement of crystal while in the cavity but in addition the amplification axis of crystal influences the laser operation tremendously, because the absorption and emission cross sections of the crystal are pretty diverse based on the orientation with the crystal.
The thermal conductivity of widespread double tungstates is in the order to three–4 W/(K m) �?which is not lousy when compared with other laser crystals (Despite the fact that numerous occasions fewer than for YAG), and rather huge compared Along with the thermal conductivity of normal glasses.
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