| Patent Number |
Title Of Patent |
Date Issued |
| 7613401 |
Optical FM source based on intra-cavity phase and amplitude modulation in lasers |
November 3, 2009 |
| A fiber optic communication system comprising: an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated; and an optical spectrum reshaper (OSR) adapted to reshape the first s |
| 7609977 |
Optical transmission using semiconductor optical amplifier (SOA) |
October 27, 2009 |
| A fiber optic communication system is disclosed having an optical signal source adapted to produce an amplitude and frequency modulated signal encoding binary data wherein high intensity 1 bits are red shifted relative to lower intensity 0 bits. The amplitude and frequency modulated |
| 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. |
| 7558488 |
Reach extension by using external Bragg grating for spectral filtering |
July 7, 2009 |
| A fiber optic system comprising a modulated signal source coupled to a spectral filtering element characterized in that the bandwidth of the optical spectrum of the signal after the spectral filtering element is reduced relative to the optical bandwidth of the spectrum before the fil |
| 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 |
| 7542683 |
Chirp Managed Laser (CML) transmitter |
June 2, 2009 |
| A fiber optic communication system comprising: an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated; and an optical spectrum reshaper (OSR) adapted to reshape the first s |
| 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 |
| 7480464 |
Widely tunable, dispersion tolerant transmitter |
January 20, 2009 |
| An optical transmitter comprising: (i) an electrical switch; (ii) a laser array comprising a plurality of tunable laser elements; and (iii) an Optical Spectrum Reshaper (OSR) used to reshape the output pulses from the laser elements in the laser array; wherein the electrical switch |
| 7474859 |
Versatile compact transmitter for generation of advanced modulation formats |
January 6, 2009 |
| A system for generating a return-to-zero differentially-phase-shift-keyed (RZ-DPSK) optical signal comprising: a driver comprising an N-level digital multilevel transformer (DMT) configured to receive a two level digital electrical signal representing 1s and 0s and output a N-level |
| 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 |
| 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 |
| 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 |
| 6785318 |
Polarization mode control of vertical cavity surface emitting lasers |
August 31, 2004 |
| Described is a semiconductor laser for generating an optical beam having a stable polarization mode. The laser includes a semiconductor structure having an active layer and a stressor disposed on the surface of the semiconductor structure. Birefringence and gain anisotropy are induced in |
