5 Simple Statements About KYW Crystal Explained
5 Simple Statements About KYW Crystal Explained
Blog Article
The get bandwidth e.g. of Yb:KGW and Yb:KYW is rather huge in contrast with that of Yb:YAG. This allows for wide wavelength tunability and for A lot shorter pulse durations from method-locked lasers. Values properly below 100 fs happen to be realized with passive method locking.
This exceptional attribute of ultrafast pulses allows nonlinear optical interaction with tissue at very low In general exposure, and drives applications for example deep-tissue multiphoton microscopy and higher-precision eye operation
We present a dual-crystal Yb:KGW laserthat iscapable to function to be a Q-switched oscillator with output electricity nearly 24 W and pulse size of 20 ns,or as being a regenerative amplifier with output electric power up to 21 W and pulse duration under two hundred fs immediately after compression of chirped pulses. Both equally lasers have great beam high quality with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals Display screen sturdy peaks at 980 nm and 1030 nm, respectively, making sure productive Strength conversion and substantial effectiveness in laser programs.
This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with immediate longitudinal pumping by powerful linear arrays of semiconductor injection lasers having fiber output. To prevent spectral narrowing through amplification and the corresponding lengthening on the amplified pulse when it's compressed, a mix of two Yb:KYW crystals have been used, With all the spectral maxima from the amplification shifted relative to one another and with spectral profiling with the amplified radiation.
Soon after air drying and subsequent cleaning that has a cotton fabric soaked in alcohol, the movie surface area showed no signs of peeling or scratches.
FIG. 1. Optical format of a laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
five mm besides the center on the beam caustic. So that you can Test the mode matching simulation, we done the experiment with Ng-Lower crystal oscillator, which was formulated Earlier and in a exact problem with simulation [eleven]. As shown in Determine three(b) with red dots and line, the CW output electrical power is very depending on the place of laser crystal as well as experimental result coincides properly with simulation end result. Being a note, multimode operation occurred in experiment if the sizing of your pump beam is larger than TEM00 cavity manner and it causes greater CW output electricity from the displacement area under 3.five mm.
... at 50 %-peak were being produced within a learn oscillator with selfsynchronization of your axial modes, explained in our previously write-up. 21 The new edition on the laser, as opposed to that described KYW Crystal inside our before post, utilized an Yb:KYW crystal by having an N pcut (optical axis N p from the index ellipsoid was parallel for the propagation route with the laser radiation), with the polarization in the created radiation directed along the N m axis.
... Not only the placement of crystal within the cavity but in addition the amplification axis of crystal has an effect on the laser Procedure drastically, because the absorption and emission cross sections with the crystal are pretty unique according to the orientation in the crystal.
Though ytterbium-doped laser acquire media commonly exhibit a little quantum defect, ytterbium-doped tungstates permit for specially modest values. By way of example, a 1030-nm Yb:YAG laser would Typically be pumped about 940 nm, whereas Yb:KGW or Yb:KYW may very well be most proficiently pumped all over 981 nm.
This tandem of characteristics has far-reaching implications, especially in the construction of compact nonetheless powerfull lasers.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is a impressive materials that plays an important part in laser technological know-how. Its Key function will be to create ultrashort pulses of light, spanning only a few hundred femtoseconds.
Concurrently, a shorter laser wavelength might be attained; it is achievable to operate by using a quantum defect very well beneath one%. As being a consequence, the warmth generation can be so smaller this partly compensates the decrease thermal conductivity.