Suzanne P Smith

US Patent:

6760350, Jul 6, 2004

Filed:

Apr 12, 2002

Appl. No.:

10/063348

Inventors:

John Leslie Fitz - Baltimore MD
Warren Taylor Beard - Huntingtown MD
Scott Carl Horst - Sykesville MD
Suzanne Dadgar Smith - Millersville MD

Assignee:

The United States of America as represented by the National Security Agency - Washington DC

International Classification:

H01S 313

US Classification:

372 29021, 372 2902, 372 31

Abstract:

Method to measure gain of a photonic inverter based on a semiconductor laser using two different modes of operation. In one mode, the device is operated as a photonic inverter device and in the other mode as a photogenerated current measurement device. While the device is operated in a photonic inverter mode, that is, pumped at a magnitude that supports photonic inverter operation, the optical output power is measured in the absence of an input signal and with an input signal that quenches the output of the photonic inverter. While the device is operated as a photogenerated current measurement device with an input optical signal, a reverse bias is applied to offset any forward bias induced by the injected input optical signal, the induced photocurrent is measured, and the wavelength of the input optical signal is measured. From these measurements, the gain is calculated using the difference in the photonic inverter optical output power with and without the optical input signal while operating in photonic inverter mode and the input power responsible for the quench of the photonic inverter while in photogenerated current measurement mode.

US Patent:

D3753867, Nov 5, 1996

Filed:

Feb 21, 1995

Appl. No.:

D/035095

Inventors:

Suzanne C. Smith - Baltimore MD

US Classification:

D28 41