KYW Crystal - An Overview
KYW Crystal - An Overview
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is very big in contrast with that of Yb:YAG. This allows for wide wavelength tunability and for Considerably shorter pulse durations from manner-locked lasers. Values perfectly down below a hundred fs are realized with passive method locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is really a amazing material that performs a very important part in laser technological know-how. Its Main purpose is to produce ultrashort pulses of light, spanning just a couple hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at about 981 nm will make the crystal like minded for diode pumping. It's additional Increased by its amazing effectiveness in this process, coupled with its small quantum defect.
Shade-coded reflectivity of the Bragg mirror as a operate of wavelength and angle from the incident beam.
Optical structure of the laser with direct pumping Along with the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output in the radiation, WP is usually a half-wave plate, CL is a collimating lens, FL is usually a focusing lens, AE is an Energetic aspect constructed from an Yb:KYW crystal, DM is usually a spherical dichroic mirror, M1-M6 are classified as the cavity mirrors, OC will be the output mirror, and SAM is really a semiconductor saturable-absorber mirror.
The monoclinic crystal structures leads to a organic birefringence, helping to keep away from thermally induced polarization rotation and depolarization reduction.
FIG. one. Optical format of a laser with direct pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
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 Earlier and in a very same condition with simulation [11]. As demonstrated in Determine 3(b) with purple dots and line, the CW output power is extremely depending on the posture of laser crystal as well as the experimental consequence coincides well with simulation end result. For a note, multimode operation transpired in experiment if the size of your pump beam is more substantial than TEM00 cavity method and it results in higher CW output electrical power from the displacement location below 3.5 mm.
... at 50 %-height were created in a very master oscillator with selfsynchronization of the axial modes, explained inside our earlier short article. 21 The new version in the laser, as opposed to that explained in our earlier short article, used an Yb:KYW crystal using an N pcut (optical axis N p of your index ellipsoid was parallel towards the propagation route of your laser radiation), With all the polarization with the created radiation directed along the N m axis.
Nevertheless, when Nd3+:YAG grew to become commercially readily available, the desire in CaWO4 dropped sharply. In afterwards years, certain other tungstate crystals started to entice plenty of consideration.
When ytterbium-doped laser get media commonly exhibit a little quantum defect, ytterbium-doped tungstates make it possible for for specially small values. As an example, a 1030-nm Yb:YAG laser would Ordinarily be pumped close to 940 nm, Whilst Yb:KGW or Yb:KYW might be most successfully pumped around 981 nm.
This tandem of characteristics has much-achieving implications, specially in the development of compact nonetheless powerfull lasers.
Yb:KYW crystal (Yb-doped get more info potassium yttrium tungstate) compared to its counterpart Yb:KGW, can be a amazing substance that performs a significant role in laser technology. Its primary function should be to create ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
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