Optically controlled surface-emitting lasers
- 27 May 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (21) , 2342-2344
- https://doi.org/10.1063/1.104919
Abstract
Vertical cavity surface‐emitting lasers are integrated with GaAs/AlGaAs heterojunction phototransistors to yield optically controlled lasers. The two‐terminal device operates in several modes: As an amplifier with a large signal, external optical gain of 5, as in optical logic gate, and as an optically or electrically triggerable latch. The optical AND gate has an output on‐to‐off ratio of 10:1. Although the device has no optical feedback, latching is achieved with appropriate biasing through impact ionization. The device structure is advantageous for forming large two‐dimensional arrays for optical signal processing.Keywords
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