Optimization of Line-Focusing Geometry for Efficient Nonlinear Frequency Conversion from Copper-Vapor Lasers

David W. Coutts*

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Detailed parametric investigations of line foci for efficient nonlinear frequency conversion of copper-vapor laser are presented. For a single medium-scale copper-vapor laser (nominally 20 W), the optimum focal geometry for efficient second-harmonic and sum-frequency generation in BBO is to focus a 3.75-mm-diameter beam into the crystal with an f = 60 mm cylindrical lens. Using such a focal geometry, UV powers of up to 1.75 W (SHG of the green), 1.2 W (SHG yellow), and 1.5 W (SFG) have been produced with peak instantaneous conversion efficiency of up to 48%. Conversion efficiencies are most sensitive to the F-number of the cylindrical focusing, with the optimum F-number being approximately 16, and are relatively insensitive to the width of the focused beam.

Original languageEnglish
Pages (from-to)2208-2214
Number of pages7
JournalIEEE Journal of Quantum Electronics
Volume31
Issue number12
DOIs
Publication statusPublished - 1995
Externally publishedYes

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Copyright 1995 IEEE. Reprinted from IEEE journal of quantum electronics. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie University’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

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