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In this paper a LD end-pumped Nd:YAG ceramic microchip laser passively Q-switched by Cr4+:YAG absorber is demonstrated to generate axisymmetrically polarized pulse. The reason to employ the end-pumped microchip laser lies in the fact that such cavity configuration is beneficial carrier both for producing energetic Q-switched pulse and also the axisymmetrical polarization. The Cr4+:YAG crystal absorber...
Angularly selective mirrors (ASMs) are proposed as a means to expand the mode area and modal discrimination of microchip lasers. ASMs used as output couplers selectively reflect incoming k vectors over a narrow angular range, while they transmit more inclined components. The eigenvalue problem of a microchip resonator equipped with a Gaussian ASM is solved analytically in the paraxial optics approximation...
This presentation will describe the recent improvements in Yb-fiber laser by applying a converging axicon. The measured results reveal this annular beam has a radial polarization with a polarization extinction ratio in the range from 2.3 to 4.4.
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