Investigation of contrast ratio dependence on the angular deviation of the laser beam direction from the optical axis of Pockels cells based on the beta barium borate crystal

Dependences of the contrast ratio on the angular deviation of the optical axis with a step of 2 arcmin 28 arcsec have been obtained for Pockels cells based on beta barium borate crystals in the 49 arcmin 34 arcsec range. The investigation was conducted for a single Pockels cell and for a double cell based on optically aligned crystals. The results of investigations can be applied for the calculation of the laser beam focus in order to use a high contrast ratio in high-power laser systems when the light is modulated using Q-switching.

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Multikilowatt Pockels cell for high average power laser systems

Journal of Applied Physics ◽

10.1063/1.346483 ◽

1990 ◽

Vol 68 (6) ◽

pp. 2589-2598 ◽

Cited By ~ 8

Author(s):

L. F. Weaver ◽

C. S. Petty ◽

D. Eimerl

Keyword(s):

Average Power ◽

Pockels Cell ◽

High Average Power ◽

Power Laser ◽

Laser Systems

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Large Mode Area Solid-Core Photonic Bandgap Yb-doped Fiber with Hetero-Structured Cladding for Compact High-Power Laser Systems

Journal of Lightwave Technology ◽

10.1109/jlt.2021.3073590 ◽

2021 ◽

pp. 1-1

Author(s):

Olivier Vanvincq ◽

Andy Cassez ◽

Remi Habert ◽

Hicham El Hamzaoui ◽

Karen Baudelle ◽

...

Keyword(s):

High Power ◽

Photonic Bandgap ◽

Solid Core ◽

High Power Laser ◽

Power Laser ◽

Large Mode Area ◽

Laser Systems ◽

Mode Area

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Heterodyne Standing-Wave Interferometer with Improved Phase Stability

Nanomanufacturing and Metrology ◽

10.1007/s41871-021-00098-3 ◽

2021 ◽

Author(s):

Ingo Ortlepp ◽

Jens-Peter Zöllner ◽

Ivo W. Rangelow ◽

Eberhard Manske

Keyword(s):

Laser Beam ◽

Frequency Shift ◽

Standing Wave ◽

Phase Difference ◽

Phase Stability ◽

Constant Velocity ◽

Optical Axis ◽

Fixed Position ◽

Length Measurements ◽

Laser Sources

AbstractThis paper describes a standing-wave interferometer with two laser sources of different wavelengths, diametrically opposed and emitting towards each other. The resulting standing wave has an intensity profile which is moving with a constant velocity, and is directly detected inside the laser beam by two thin and transparent photo sensors. The first sensor is at a fixed position, serving as a phase reference for the second one which is moved along the optical axis, resulting in a frequency shift, proportional to the velocity. The phase difference between both sensors is evaluated for the purpose of interferometric length measurements.

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