Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is rather significant in comparison with that of Yb:YAG. This permits for broad wavelength tunability and for Substantially shorter pulse durations from manner-locked lasers. Values nicely below a hundred fs are already reached with passive manner locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is a remarkable material that plays an essential purpose in laser technology. Its Main operate is usually to make ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
We current a twin-crystal Yb:KGW laserthat iscapable to work to be a Q-switched oscillator with output energy as many as 24 W and pulse length of 20 ns,or as being a regenerative amplifier with output electricity approximately 21 W and pulse duration below two hundred fs following compression of chirped pulses. Each lasers have excellent beam high-quality with beam parameter M2
FIG. 4. Autocorrelation functionality of the heartbeat 共a兲and spectrum 共b兲of the laser with an oblong Lively element for an output electrical power of seven-hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers acquiring fiber output. To forestall spectral narrowing through amplification along with the corresponding lengthening in the amplified pulse when it's compressed, a mix of two Yb:KYW crystals have been used, While using the spectral maxima on the amplification shifted relative to one another and with spectral profiling on the check here amplified radiation.
Before the development of Nd:YAG, Nd3+:CaWO4 was a very important rare-earth-doped laser achieve medium. It had been in truth used in the main continually working crystal laser.
FIG. one. Optical layout of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output
Tungstates tend to own superior Raman coefficients (�?Raman scattering). Consequently, they're able to crank out sizeable Raman acquire at moderate optical intensities. It is possible to use the laser crystal itself as a Raman converter.
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Even so, once Nd3+:YAG became commercially out there, the curiosity in CaWO4 dropped sharply. In afterwards yrs, specified other tungstate crystals began to appeal to loads of consideration.
The thermal conductivity of widespread double tungstates is from the order to three–four W/(K m) �?which is not poor compared with other laser crystals (although quite a few times below for YAG), and rather big in comparison Together with the thermal conductivity of usual glasses.
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