The KYW Crystal Diaries

The KYW Crystal Diaries

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In simple terms, the Yb:KYW crystal has discovered its specialized niche in substantial-power laser applications due to its ability to produce higher Power ultrashort laser pulses although sustaining a compact measurement. The interaction of its attributes �?seamless ytterbium substitution, robust absorption qualities, ultrashort pulse era and efficiency in Power conversion �?positions the Yb:KYW crystal as a cornerstone from the laser technologies, covering varied fields ranging from scientific investigate to industrial applications.

The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison to its counterpart Yb:KGW, is often a outstanding materials that performs a significant role in laser know-how. Its Key functionality is to deliver ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.

The Yb:KYW crystal’s proficiency in gentle absorption at all-around 981 nm can make the crystal well matched for diode pumping. It can be more enhanced by its extraordinary effectiveness in this method, coupled with its reduced quantum defect.

Coloration-coded reflectivity of the Bragg mirror as a perform of wavelength and angle in the incident beam.

Optical structure of a laser with direct pumping Along with the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output of the radiation, WP is usually a fifty percent-wave plate, CL is usually a collimating lens, FL is actually a concentrating lens, AE can be an active ingredient made from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 are the cavity mirrors, OC would be the output mirror, and SAM is usually a semiconductor saturable-absorber mirror.

The monoclinic crystal constructions results in a all-natural birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization reduction.

FIG. 1. Optical structure of a laser with immediate pumping Using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output

Tungstates are inclined to acquire high Raman coefficients (�?Raman scattering). Thus, they might make major Raman achieve at reasonable optical intensities. It is achievable to make use of the laser crystal itself as being a Raman converter.

For tungstates, the ytterbium doping focus can be very significant without sizeable quenching because the replaced ions have an exceptionally comparable ion radius, along with the inter-ion length is pretty large.

High-electric power repetitively pulsed ytterbium lasers with supershort pulse width and immediate diode pumping for technological and biomedical programs

Although ytterbium-doped laser achieve media commonly show a little quantum defect, ytterbium-doped tungstates make it possible for for especially tiny values. As an example, a 1030-nm Yb:YAG laser would Generally be pumped all-around 940 nm, whereas Yb:KGW or Yb:KYW might be most efficiently pumped around 981 nm.

Li2WO4-WO3 flux was effectively utilized cutting down The expansion temperature beneath 900 oC. In line with one crystal x-ray measurements, the crystal corresponds to the P2/n Area group.

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