Light beam redistribution using computer-generated phase plates

Author

Kawakami, Shojiro ; Ogawa, Osamu

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

7

Issue

9

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

1412

Lastpage

1418

Abstract

The use of two phase plates for light-beam power redistribution is proposed. The first plate is designed so that the desired power distribution is obtained by near-field diffraction; the purpose of the second plate is the correction of the phase front. The deviation is based on ray optics, which is a good approximation in practical situations. As an example, design and fabrication of the phase plate for 1:2 branching of single-mode fibers are described. The phase plates have a computer-generated pattern and are fabricated by electron-beam lithography. Experimental verification of beam branching is presented

Keywords

computer-generated holography; electron beam lithography; holographic optical elements; laser beams; lenses; light diffraction; optical elements; optical fibres; 1:2 branching; beam branching; computer-generated phase plates; electron-beam lithography; light-beam power; micro Fresnel lens; near-field diffraction; phase front detection; power distribution; ray optics; redistribution; single-mode fibers; Electron beams; Laser beams; Lenses; Lithography; Optical fiber networks; Optical fibers; Optical sensors; Optical waveguides; Power distribution; Shape;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.50722

Filename

50722