The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is extremely big as opposed with that of Yb:YAG. This permits for broad wavelength tunability and for Substantially shorter pulse durations from mode-locked lasers. Values nicely down below a hundred fs have already been attained with passive mode locking.
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Femtosecond laser determined by Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the heartbeat
FIG. four. Autocorrelation operate of the heart beat 共a兲and spectrum 共b兲of a laser with an oblong Lively aspect for an output ability of seven hundred mW. The width of
Ultrafast lasers, with pulse widths of a few picoseconds (ten−twelve s) or much less, empower the time resolution necessary in laser-enthusiastic fluorescence life span spectroscopy and imaging approaches.Moreover, they supply superior pulse peak powers at higher repetition fees and moderate ordinary output powers.
Right before the event of Nd:YAG, Nd3+:CaWO4 was a very important uncommon-earth-doped laser achieve medium. It had been in actual fact Utilized in the initial repeatedly running crystal laser.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and are made use of as lasing supplies to deliver ultrashort (~ a hundred-two hundred fs) high electrical power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser units.
Tungstates tend to get substantial Raman coefficients (�?Raman scattering). Consequently, they could crank out substantial Raman get at moderate optical intensities. It is feasible to utilize the laser crystal alone being a Raman converter.
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Even so, once Nd3+:YAG became commercially available, the desire in CaWO4 dropped sharply. In later on decades, sure other tungstate crystals began to draw in plenty of consideration.
The thermal conductivity of common double tungstates is from the buy to 3–4 W/(K m) �?which isn't poor in comparison with other laser crystals (Even though quite a few periods lower than for YAG), and relatively massive in contrast Using the thermal conductivity of usual glasses.
Li2WO4-WO3 flux was properly applied cutting down The expansion temperature below 900 oC. As outlined by one crystal x-ray measurements, the crystal corresponds towards the P2/n Room team.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison with its counterpart Yb:KGW, can be a impressive substance that performs a very important function in laser technological innovation. Its Principal operate would be to generate ultrashort pulses of light, spanning just a few click here hundred femtoseconds.
Inquire RP Photonics for virtually any suggestions about tungstate lasers, which include femtosecond lasers and large-power lasers.