Accession Number:

ADA285859

Title:

GaAs Optical Circuits

Descriptive Note:

Rept. for Oct 1992-Sep 1993

Corporate Author:

ROME LAB ROME NY

Report Date:

1994-08-01

Pagination or Media Count:

43.0

Abstract:

This report presents two new smart pixels for use in optical computing and communications. These devices are Configurable Optical Gates COGs that form the Diode Laser Logic DLL family and Spontaneous Emission Filtered Laser Amplifiers SEFLA. DLL is a complete, new logic family comprised of Q-switched lasers and photodetectors. The lasers and detectors are monolithically integrated on multiple quantum well laser heterostructure with semi-insulating substrates. Preliminary results indicate an ONOFF contrast ratio better than 5001, gain in excess of 20 and variable 10 hysteresis characteristics. As a result, the devices can be cascaded to form more complex optical circuits. In addition to introducing the Diode Laser Logic family, a basic model is presented and the fabrication process is described in detail. The SEFLA combines an optical amplifier with a spontaneous emission filter in order to increase the signal-to noise ratio by actively filtering out the spontaneous emission from the output signal. The filtering function is accomplished by integrating the amplifier with a semiconductor laser in such a way that the signal in the amplifier suppresses the gain in the laser. Unlike conventional optical amplifiers, these can, in principle, be cascaded without significantly decreasing the performance. Configurable Optical Gates COGs, Diode Laser Logic DLL, Spontaneous Emission Filtered Laser Amplifiers

Subject Categories:

  • Lasers and Masers
  • Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE