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Using Holographic Optical Element for Reducing Aspect Ratio of Gaas Laser Beam

IP.com Disclosure Number: IPCOM000062249D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Dickson, LD: AUTHOR

Abstract

The output beam of a GaAs laser typically has an elliptical shape with an aspect ratio in a range of 2:1 to 4:1. For certain applications, a circular output beam (aspect ratio of 1:1) is desirable.

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Using Holographic Optical Element for Reducing Aspect Ratio of Gaas Laser Beam

The output beam of a GaAs laser typically has an elliptical shape with an aspect ratio in a range of 2:1 to 4:1. For certain applications, a circular output beam (aspect ratio of 1:1) is desirable.

It is proposed that a linear holographic optical element or grating be mounted on the GaAs laser. The aspect ratio of the first order beam produced by the holographic optical element could be reduced considerably.

An index matching fluid could be used to partially match indices and reduce reflection losses. Reflection losses at the upper surface would be nominal as P- polarization reflection would be nearly zero.

Disclosed anonymously.

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