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Femtosecond laser based on Yb:KYW crystals with suppression of spectral narrowing within a regenerative amplifier by spectral profiling of the heart beat

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Optical format of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output of the radiation, WP is often a fifty percent-wave plate, CL is usually a collimating lens, FL is actually a concentrating lens, AE is an Energetic factor produced from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC is definitely the output mirror, and SAM is really a semiconductor saturable-absorber mirror.

The monoclinic crystal buildings ends in a pure birefringence, assisting to keep away from thermally induced polarization rotation and depolarization reduction.

PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and therefore are employed as lasing resources to create ultrashort (~ 100-two hundred fs) substantial electrical power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes running at 981 nm supports compact laser techniques.

Tungstates are inclined to have significant Raman coefficients (�?Raman scattering). Hence, they might crank out sizeable Raman get at reasonable optical intensities. It is feasible to utilize the laser crystal by itself like a Raman converter.

For tungstates, the ytterbium doping concentration can be quite superior with out important quenching as the changed ions have a really comparable ion radius, along with the inter-ion length is relatively big.

By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW a result of the equivalent dimensions of these chemical components around 100% of Yb-doping could be obtained.

The thermal conductivity of frequent double tungstates is from the get to 3–four W/(K m) �?which is not lousy when compared with other laser crystals (Though several periods lower than for YAG), and quite huge as opposed With all the thermal conductivity of usual glasses.

Li2WO4-WO3 flux was successfully applied cutting down The expansion temperature below 900 oC. In line with solitary crystal x-ray measurements, the crystal corresponds for the P2/n House team.

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