Optical comb generator using optical white noise source
First Claim
1. A transmitter for multi-wavelength modulated optical communication, comprising:
- a) an optical white noise generator having an optical amplifier stimulated by a laser for providing an output of a broad spectrum of wavelengths;
b) a wavelength staggered optical bandpass filter, coupled to said optical white noise generator and responsive to said output, for generating a series of equally spaced optical information carriers in the form of a comb of optical wavelengths;
c) a digital modulator means for receiving said comb of optical wavelengths, and synchronously modulating said comb of optical wavelengths; and
d) an optical fiber coupled to said digital modulator means for transmitting said synchronously modulated comb of optical wavelengths.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method for multi-wavelength modulated optical communication uses the same optical fiber without the use of multiple tuned lasers. A transmitter includes an optical comb generator and a digital modulator. The optical comb generator generates a broad spectrum of wavelengths using a white noise generator. A Fabry-Perot cavity filters the wavelengths to form a set of equally spaced resonances lambda-1 . . . lambda-n. The comb generator is locked to a particular wave length by comparing each carrier or the composite mean of the carriers to an optical reference. An error signal is generated and fed back into the into comb generator. The resonances are split into n-channels using a tree splitter. Each channel is modulated in the digital modulator. The channels are summed as an optical signal and amplified to ensure proper power levels prior to being fed to an optical fiber.
53 Citations
10 Claims
-
1. A transmitter for multi-wavelength modulated optical communication, comprising:
-
a) an optical white noise generator having an optical amplifier stimulated by a laser for providing an output of a broad spectrum of wavelengths; b) a wavelength staggered optical bandpass filter, coupled to said optical white noise generator and responsive to said output, for generating a series of equally spaced optical information carriers in the form of a comb of optical wavelengths; c) a digital modulator means for receiving said comb of optical wavelengths, and synchronously modulating said comb of optical wavelengths; and d) an optical fiber coupled to said digital modulator means for transmitting said synchronously modulated comb of optical wavelengths. - View Dependent Claims (2, 3, 4)
-
-
5. In a transmitter for multi-wavelength modulated optical communication, said transmitter including an optical comb generator and a digital modulator means, a method of generating optical carriers for transmission via an optical fiber without using multiple tuned lasers, comprising the steps of:
-
a) generating a broad spectrum of wavelengths using a white noise generator; b) using a wavelength staggered optical bandpass filter for filtering said wavelengths to form a set of equally spaced resonances lambda-1 . . . lambda-n; c) using a tree splitter for splitting said resonances into n-channels; d) modulating each of said n-channels in said digital modulator means; and e) summing and amplifying said channels as an optical signal to ensure proper power levels prior to feeding said optical signal to an optical fiber. - View Dependent Claims (6, 7, 8, 9, 10)
-
Specification