Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is quite huge when compared with that of Yb:YAG. This permits for extensive wavelength tunability and for Substantially shorter pulse durations from method-locked lasers. Values nicely beneath 100 fs happen to be obtained with passive mode locking.
The comparison with Eyeglasses is appropriate since the significant obtain bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We present a dual-crystal Yb:KGW laserthat iscapable to operate as being a Q-switched oscillator with output power approximately 24 W and pulse size of twenty ns,or like a regenerative amplifier with output power approximately 21 W and pulse period under 200 fs soon after compression of chirped pulses. The two lasers have fantastic beam quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers obtaining fiber output. To prevent spectral narrowing in the course of amplification as well as corresponding lengthening from the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals have been employed, Together with the spectral maxima of the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
Adhesion Test Compliant with MIL-C-675C military services criteria, an adhesion check associated applying a tape that fulfills LT-90 specs on to the lens film layer. The tape was affixed absolutely after which you can taken off vertically. This technique was done 3 times, causing no blistering or peeling.
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five mm apart from the center with the beam caustic. So that you can Check out the manner matching simulation, we done the experiment with Ng-Reduce crystal oscillator, which was made Beforehand and in a exact same issue with simulation [eleven]. As proven in Determine three(b) with red dots and line, the CW output electrical power is extremely depending on the placement of laser crystal as well as experimental result coincides effectively with simulation end result. Being a Notice, multimode operation occurred in experiment in the event the sizing of your pump beam is larger sized than TEM00 cavity method and it triggers larger CW output power during the displacement area beneath three.five mm.
For tungstates, the ytterbium doping concentration can be quite large with no important quenching since the replaced ions have a really comparable ion radius, and also the inter-ion length is fairly substantial.
... Not simply the place of crystal in the cavity and also the amplification axis of crystal affects the laser operation enormously, because the absorption and emission cross sections of the crystal are pretty diverse according to the orientation of your crystal.
The thermal conductivity of frequent double tungstates is with the order to three–four W/(K m) �?which isn't undesirable as opposed with other laser crystals (Even though many instances fewer than for YAG), and fairly large as opposed with the thermal conductivity of typical glasses.
This tandem of characteristics has significantly-achieving implications, particularly in the development of compact however powerfull lasers.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is usually a remarkable materials that plays an important purpose in laser know-how. Its primary purpose is to crank out ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
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