Abstract

An axicon optical element that utilizes a diffraction grating has been fabricated for collimating the Čerenkov radiation wave. The grating axicon has the advantage of a simple structure, which can easily be fabricated by the computerized numerical control machining technique. The collimation function of the grating axicon is confirmed for Čerenkov-type second-harmonic generation in LiNbO₃ waveguides, and correction of the aberration caused by substrate anisotropy is investigated. The aberration can be compensated by appropriately inclining either the substrate facet or the grating axicon.

© 1990 Optical Society of America

Collimating properties of an axicon for the Čerenkov-radiation-type second-harmonic light from a crystal-cored fiber

Kiyofumi Chikuma, Sota Okamoto, Teruo Tohma, and Shinsuke Umegaki
Appl. Opt. 33(15) 3198-3202 (1994)

Parabolic mirror optics for collimation of a crescent blue laser beam radiated from channel waveguide Čerenkov second-harmonic generation

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Three-dimensional simulation of guided-wave second-harmonic generation in the form of coherent Čerenkov radiation

K. Hayata and M. Koshiba
Opt. Lett. 16(20) 1563-1565 (1991)