Fiber Optic Continuous True Time-Delay Modulator.
Abstract
The fiber optic true time-delay modulator generates a continuously variable true time-delay (i.e., phase shift) by utilizing the dispersion characteristic of single mode optical fibers. The signal to be variably delayed modulates a continuous wave optical signal from a tunable laser source which is applied to a dispersive optical fiber wherein the phase shift occurs. The optical intensity output of the dispersive optical fiber is converted back into electrical energy by a photodetector for use in radio frequency, microwave and millimeter wave electronic devices. The invention can be used to generate multiple synchronized output signals by using a multiple wavelength laser or by combining outputs from several independently tuned lasers. Also, frequency and phase shifting is inherently provided by modulating the time delay.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 06, 1993
- Accession Number
- ADD016098
Entities
People
- Ronald D. Esman
Organizations
- United States Department of the Navy