ANDREW SCOTT KEYS
Pilots at Clutts Rd, Harvest, AL
License number
Alabama A4739068
Issued Date
Oct 2016
Expiration Date
Oct 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
270 Clutts Rd, Harvest, AL 35749
Professional information
Phase Modulator With Terahertz Optical Bandwidth Formed By Multi-Layered Dielectric Stack
US Patent:
6885779, Apr 26, 2005
Filed:
Jun 6, 2001
Appl. No.:
09/877801
Inventors:
Andrew S. Keys - Harvest AL, US
Richard L Fork - Madison AL, US
Richard L Fork - Madison AL, US
Assignee:
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration - Washington DC
International Classification:
G02F001/035, G02F001/01, G02B006/35
US Classification:
385 2, 385 16, 359240
Abstract:
An optical phase modulator includes a bandpass multilayer stack, formed by a plurality of dielectric layers, preferably of GaAs and AlAs, and having a transmission function related to the refractive index of the layers of the stack, for receiving an optical input signal to be phase modulated. A phase modulator device produces a nonmechanical change in the refractive index of each layer of the stack by, e. g. , the injection of free carrier, to provide shifting of the transmission function so as to produce phase modulation of the optical input signal and to thereby produce a phase modulated output signal.