An Unbiased View of KYW Crystal
An Unbiased View of KYW Crystal
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is rather substantial in comparison with that of Yb:YAG. This allows for extensive wavelength tunability and for Substantially shorter pulse durations from manner-locked lasers. Values properly down below 100 fs are accomplished with passive method locking.
The comparison with glasses is suitable Considering that the big achieve bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
We current a dual-crystal Yb:KGW laserthat iscapable to operate as being a Q-switched oscillator with output power as much as 24 W and pulse size of twenty ns,or like a regenerative amplifier with output electrical power up to 21 W and pulse duration down below 200 fs immediately after compression of chirped pulses. The two lasers have excellent beam top quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier based upon two Yb:KYW crystals with immediate longitudinal pumping by impressive linear arrays of semiconductor injection lasers owning fiber output. To forestall spectral narrowing during amplification as well as corresponding lengthening of the amplified pulse when it truly is compressed, a mix of two Yb:KYW crystals ended up used, Together with the spectral maxima on the amplification shifted relative to each other and with spectral profiling of the amplified radiation.
Right before the event of Nd:YAG, Nd3+:CaWO4 was an important uncommon-earth-doped laser attain medium. It was actually used in the primary continuously working crystal laser.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and therefore are employed as lasing supplies to create ultrashort (~ 100-200 fs) high power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser systems.
Spatial structure with the beam and the corresponding intensity profiles I with the output with the laser.
... at half-height had been produced within a learn oscillator with selfsynchronization with the axial modes, explained inside our earlier report. 21 The new edition of the laser, not like that described in our previously short article, made use of an Yb:KYW crystal with an N pcut (optical axis N p from the index ellipsoid was parallel to your propagation course of your laser radiation), click here with the polarization of the generated radiation directed along the N m axis.
Nevertheless, once Nd3+:YAG became commercially accessible, the interest in CaWO4 dropped sharply. In later on many years, certain other tungstate crystals began to entice a lot of interest.
The thermal conductivity of common double tungstates is of your order to 3–4 W/(K m) �?which is not terrible as opposed with other laser crystals (Even though a number of instances a lot less than for YAG), and quite large compared With all the thermal conductivity of normal glasses.
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