The Single Best Strategy To Use For KYW Crystal
The Single Best Strategy To Use For KYW Crystal
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is quite huge in comparison with that of Yb:YAG. This enables for vast wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values very well beneath 100 fs have already been accomplished with passive mode locking.
This unique characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at minimal Total publicity, and drives apps for instance deep-tissue multiphoton microscopy and large-precision eye surgery
We present a twin-crystal Yb:KGW laserthat iscapable to function like a Q-switched oscillator with output electrical power around 24 W and pulse length of twenty ns,or for a regenerative amplifier with output electricity around 21 W and pulse length beneath two hundred fs immediately after compression of chirped pulses. Equally lasers have superb beam quality with beam parameter M2
FIG. four. Autocorrelation operate of the pulse 共a兲and spectrum 共b兲of the laser with a rectangular Energetic ingredient for an output electrical power of seven-hundred mW. The width of
Optical layout of the laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output from the radiation, WP is really a half-wave plate, CL is usually a collimating lens, FL is really a concentrating lens, AE is undoubtedly an Lively factor made out of an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 are the cavity mirrors, OC is the output mirror, and SAM is a semiconductor saturable-absorber mirror.
Just before the development of Nd:YAG, Nd3+:CaWO4 was a very important scarce-earth-doped laser obtain medium. It had been in truth Utilized in the primary repeatedly working crystal laser.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and they are made use of as lasing components to produce ultrashort (~ a hundred-200 fs) substantial electric power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser techniques.
five mm aside from the middle from the beam caustic. So that you can Examine the manner matching simulation, we carried out the experiment with Ng-Slice crystal oscillator, which was created Beforehand As well as in a very same problem with simulation [eleven]. As demonstrated in Determine 3(b) with purple dots and line, the CW output energy is extremely depending on the place of laser crystal plus the experimental result coincides properly with simulation final result. As being a Notice, multimode Procedure happened in experiment when the dimensions on the pump beam is bigger than TEM00 cavity manner and it leads to larger CW output electric power in the displacement region under three.five mm.
For tungstates, the ytterbium doping focus can be extremely substantial without having substantial quenching as the changed ions have an extremely equivalent ion radius, and the inter-ion length is fairly huge.
Having said that, once Nd3+:YAG became commercially obtainable, the fascination in CaWO4 dropped sharply. In afterwards decades, certain other tungstate crystals started to entice plenty of consideration.
The thermal conductivity of common double tungstates is of your buy to three–4 W/(K m) �?which isn't undesirable as opposed with other laser crystals (although a number of periods fewer than for YAG), and reasonably significant in contrast With all the thermal conductivity of usual Eyeglasses.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at area temperature were measured. The emission spectrum and life span in the three F 4 energized point out were being determined. Employing typical and modified Judd–Ofelt theories, the depth parameters plus the radiative lifetimes ended up calculated and fantastic settlement While using the experimental benefits was received for both equally theories.
Simultaneously, a shorter laser wavelength is often received; it is possible to operate which has a quantum defect effectively beneath one%. For a consequence, the warmth technology can be so little that this get more info partly compensates the reduced thermal conductivity.