Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly large in comparison with that of Yb:YAG. This enables for large wavelength tunability and for Significantly shorter pulse durations from manner-locked lasers. Values nicely below 100 fs are already obtained with passive mode locking.
The comparison with glasses is acceptable Because the large acquire bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
Femtosecond laser according to Yb:KYW crystals with suppression of spectral narrowing inside of a regenerative amplifier by spectral profiling of the heartbeat
FIG. four. Autocorrelation perform of the heart beat 共a兲and spectrum 共b兲of a laser with a rectangular active component for an output electrical power of 700 mW. The width of
This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by strong linear arrays of semiconductor injection lasers having fiber output. To forestall spectral narrowing for the duration of amplification and also the corresponding lengthening of your amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals have been made use of, Along with the spectral maxima with the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
The monoclinic crystal structures leads to a natural birefringence, helping to prevent thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical layout of the laser with direct pumping Using the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output
A large brightnessQ-switched oscillator and regenerative amplifier according to a twin-crystal Yb:KGW laser
For tungstates, the ytterbium doping concentration can be very higher without sizeable quenching since the replaced ions have an extremely comparable ion radius, and the inter-ion distance is fairly substantial.
Significant-electrical power repetitively pulsed ytterbium lasers with supershort pulse width and immediate diode pumping for technological and biomedical applications
The thermal conductivity of widespread double tungstates is from the order to 3–4 W/(K m) �?which is not lousy compared with other laser crystals (although quite a few moments lower than for YAG), and reasonably huge in comparison With all the thermal conductivity of normal glasses.
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