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Orthogonally polarized dual-wavelength Yb:KGW laser induced by thermal lensing (2016)

Springer

In: Applied Physics B

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Publication Date: 2016-05-28

Description: Simultaneous dual-wavelength laser oscillation with orthogonal polarizations has been observed and analyzed in a continuous wave N g -cut Yb:KGW oscillator. Without inserting any optical elements for polarization control, the N m - and N p -polarized modes, each of which possessed a distinct wavelength, coexisted and switched twice in two power regimes as the pump power was varied. The two wavelengths and their separation slightly depended on output coupling level. The wavelength switching and coexistence was studied and explained by considering the thermal and spectral anisotropy of the Yb:KGW crystals, which led to polarization-dependent reabsorption loss in the unpumped regions of the crystal. The maximum average output power obtained in the dual-wavelength regime was 4.6 W.

Print ISSN: 0946-2171

Electronic ISSN: 1432-0649

Topics: Physics

Published by Springer

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