The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 1990
Filed:
Sep. 08, 1988
Robert Olshansky, Wayland, MA (US);
Vincent Lanzisera, Northboro, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
An optical communication system includes an optical transmitter for transmitting a subcarrier multiplexed optical signal through a single mode optical fiber to an optical receiver. The optical transmitter includes an optical source for generating a light beam. The optical source is preferably a high speed laser diode emitting in a spectral range of 1.3-1.6 micrometers. The light beam is intensity modulated with a composite modulation signal comprising multiple modulated microwave carriers. Each of the microwave carriers intensity modulates the light beam with a modulation index m.sub.i to provide the optical signal for transmission. The total modulation index M, defined by M=.SIGMA.m.sub.i, of the optical signal exceeds unity without degradation of the signal-to-noise ratio. By permitting the total modulation index to exceed unity, a large number of microwave carriers can simultaneously be transmitted, and the information-carrying capacity of the optical communication system is enhanced.