| Patent Number |
Title Of Patent |
Date Issued |
| 7564889 |
Adiabatically frequency modulated source |
July 21, 2009 |
| A Distributed Feed-Back (DFB) laser integrated with an Electroabsorption (EA) modulator whose facet at the end of EA modulator section has finite reflectively to create adiabatic chirp by optical feedback to the DFB laser. |
| 7555225 |
Optical system comprising an FM source and a spectral reshaping element |
June 30, 2009 |
| An optical communication system which has an optical signal source adapted to receive a base binary signal and produce a first signal, said first signal being frequency modulated; andan optical spectrum reshaper adapted to reshape the first signal into a second signal, said second signal |
| 7536113 |
Chirp managed directly modulated laser with bandwidth limiting optical spectrum reshaper |
May 19, 2009 |
| A fiber optic communication system, comprising: an optical signal source adapted to produce a frequency modulated signal; and an optical spectrum reshaper adapted to receive the frequency modulated signal and output a substantially amplitude modulated signal; wherein the optical spectr |
| 7505694 |
Thermal chirp compensation systems for a chirp managed directly modulated laser (CML.TM.) data l |
March 17, 2009 |
| A fiber optic communication system for receiving an electronic digital data signal and transmitting the same, comprising an optical signal source adapted to receive the digital data signal and to produce a frequency modulated optical signal from a directly modulated semiconductor las |
| 7492976 |
Flat dispersion frequency discriminator (FDFD) |
February 17, 2009 |
| This invention provides a flat dispersion frequency discriminator (FDFD) capable of having a substantially flat dispersion with either a positive or negative dispersion along the spectrum region of the discriminator. This way, a FDFD may not cause substantial distortion of the intensity |
| 7477851 |
Power source for a dispersion compensation fiber optic system |
January 13, 2009 |
| This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical f |
| 7406267 |
Method and apparatus for transmitting a signal using thermal chirp management of a directly modu |
July 29, 2008 |
| A fiber optic transmitter comprising a digital driver adapted to adjust the crossing point of a digital base signal, an optical source adapted to receive the digital base signal and produce a frequency modulated optical signal, and an optical spectrum reshaper adapted to convert the freq |
| 7406266 |
Flat-topped chirp induced by optical filter edge |
July 29, 2008 |
| A fiber optic communication system comprising: an optical signal source adapted to produce a binary amplitude modulated signal; and an optical spectrum reshaper adapted to receive the amplitude modulated signal and to change the instantaneous frequency of the signal at its 0-to-1 and |
| 7376352 |
Chirp managed laser fiber optic system including an adaptive receiver |
May 20, 2008 |
| A fiber optic communication system comprising: an optical signal source adapted to produce a frequency modulated signal; and an optical spectrum reshaper (OSR) adapted to convert the frequency modulated signal into a substantially amplitude modulated signal, wherein the optical spectru |
| 7356264 |
Chirp managed laser with electronic pre-distortion |
April 8, 2008 |
| A fiber optic transmitter comprising: a digital driver adapted to adjust the rise time and fall time of a digital input signal; an optical source adapted to receive the digital signal and produce a frequency modulated optical signal; and an optical spectrum reshaper adapted to convert |
| 7352968 |
Chirped managed, wavelength multiplexed, directly modulated sources using an arrayed waveguide g |
April 1, 2008 |
| There is provided a fiber optic system comprising: a multi-wavelength source adapted to generate frequency modulated signals having different wavelengths, .lamda..sub.1, .lamda..sub.2, . . . , .lamda..sub.n; and an arrayed waveguide grating adapted to convert the multiplicity of fr |
| 7263291 |
Wavelength division multiplexing source using multifunctional filters |
August 28, 2007 |
| This invention provides a system that combines a wavelength multiplexer with an FM discriminator for chirp reduction and wavelength locker in a filter to produce a wavelength division multiplexed signal with reduced chirp. A partially frequency modulation laser signal is converted into a |
| 7187821 |
Carrier suppression using adiabatic frequency modulation (AFM) |
March 6, 2007 |
| A method and system for suppression of the optical carrier of an optically modulated digital signal, the method comprising the steps of: modulating the amplitude of an optical carrier with digital input data to generate an amplitude modulated optical signal; and modulating the frequency |
| 7054538 |
Flat dispersion frequency discriminator (FDFD) |
May 30, 2006 |
| This invention provides a flat dispersion frequency discriminator (FDFD) capable of having a substantially flat dispersion with either a positive or negative dispersion along the spectrum region of the discriminator. This way, a FDFD may not cause substantial distortion of the intensity |
| 6963685 |
Power source for a dispersion compensation fiber optic system |
November 8, 2005 |
| This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filte |
| 6940889 |
Optical pulse source for long haul optical communication systems |
September 6, 2005 |
| In accordance with the invention, a modulated RZ pulse source comprises a modulated light source optically coupled to a stabilized Bragg grating filter and one or more optical taps. The light source is preferably modulated in power and frequency and has an adjustable channel wavelength |
| 6335819 |
All-optical regeneration at high bit rates using an electroabsorption modulator |
January 1, 2002 |
| The present invention provides simultaneous all-optical regeneration (re-shape and re-amplify) and wavelength conversion using a reverse-biased electroabsorption modulator. The nonlinear optical transmission characteristic of the electroabsorption modulator reshapes the degraded inpu |
