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Fabrication of Optically Coupled Pairs of Injection Lasers

IP.com Disclosure Number: IPCOM000095545D
Original Publication Date: 1964-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Rupprecht, H: AUTHOR

Abstract

To align the light beam of one light emitting diode to the corresponding region in a second diode is a critical operation. This procedure is for the fabrication of such an optically coupled pair.

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Fabrication of Optically Coupled Pairs of Injection Lasers

To align the light beam of one light emitting diode to the corresponding region in a second diode is a critical operation. This procedure is for the fabrication of such an optically coupled pair.

A relatively long bar of the laser material, which has undergone the normal treatment, is mounted on a tinned tab as in the left-hand drawing. Then, the crystal is cut in half with a very thin wire saw. An undercut or cross-cut allows cleaving after sawing.

If the two lasers are electrically insulated, the bar is mounted on an insulating plate with two separate conducting areas as is shown in the right-hand drawing. After cleaving the remaining airgap, it can either be left as it is or it can be filled with an electrically insulating medium of the same index of refraction as the semiconducting material.

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