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Class Information
Number: 398/84
Name: Optical communications > Multiplex > Wavelength division or frequency division (e.g., raman, brillouin, etc.) > By optical coupling > Add or drop > Grating
Description: Subject matter comprising an add or drop multiplexer in which signal is either multiplexed or demultiplexed with a grating.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7593638 |
Secure upstream transmission in passive optical networks |
Sep. 22, 2009 |
| 7587112 |
Optical device and light control method |
Sep. 8, 2009 |
| 7583423 |
Switchable polymer-dispersed liquid crystal optical elements |
Sep. 1, 2009 |
| 7515833 |
Optical double sideband modulation technique with increased spectral efficiency |
Apr. 7, 2009 |
| 7505647 |
Method and apparatus for demultiplexing optical signals in a passive optical network |
Mar. 17, 2009 |
| 7492999 |
Optical fiber and optical-fiber transmission line |
Feb. 17, 2009 |
| 7480429 |
Chip to Chip optical interconnect |
Jan. 20, 2009 |
| 7463828 |
Optical channel monitor |
Dec. 9, 2008 |
| 7457544 |
Single channel four-port group delay compensation equalizer |
Nov. 25, 2008 |
| 7457495 |
Method of filtering optical signals with a capillary waveguide tunable optical device |
Nov. 25, 2008 |
| 7454139 |
High-capacity packet-switched ring network |
Nov. 18, 2008 |
| 7424226 |
Optical code division multiplexing communication method and system |
Sep. 9, 2008 |
| 7398021 |
Optical transmitter and passive optical network using the same |
Jul. 8, 2008 |
| 7394986 |
Flat top optical filtering component |
Jul. 1, 2008 |
| 7389047 |
Optical ring transmission network |
Jun. 17, 2008 |
| 7389048 |
Optical wavelength-division multiple access system and optical network unit |
Jun. 17, 2008 |
| 7385761 |
Diffraction grating device and optical apparatus |
Jun. 10, 2008 |
| 7373039 |
Low-ripple optical device |
May. 13, 2008 |
| 7356259 |
Optical bypass upgrade configuration |
Apr. 8, 2008 |
| 7352928 |
Tunable optical add/drop multiplexer |
Apr. 1, 2008 |
| 7340175 |
Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system |
Mar. 4, 2008 |
| 7333729 |
Optical transmitter, optical receiver and optical transmission system using same |
Feb. 19, 2008 |
| 7330658 |
Device and method for optical add/drop multiplexing |
Feb. 12, 2008 |
| 7321466 |
High dispersion diffraction grating including multiple holographic optical elements |
Jan. 22, 2008 |
| 7321704 |
Wavelength cross connect with per port performance characteristics |
Jan. 22, 2008 |
| 7317875 |
Optical communication network system, wavelength routing apparatus, communication node, optical path managing method for use in optical cross connect apparatus, and apparatus for that method |
Jan. 8, 2008 |
| 7310463 |
Optical structural body, its manufacturing method and optical element |
Dec. 18, 2007 |
| 7302179 |
Optical performance monitor using co-located switchable fiber bragg grating array |
Nov. 27, 2007 |
| 7298976 |
Bi-directional optical cross-connect device |
Nov. 20, 2007 |
| 7295738 |
System and method for performing dispersion compensation |
Nov. 13, 2007 |
| 7292755 |
Optical resonator formed in a planar optical waveguide with a distributed optical structure |
Nov. 6, 2007 |
| 7292786 |
Method and system for a re-configurable optical multiplexer, de-multiplexer and optical add-drop multiplexer |
Nov. 6, 2007 |
| 7286764 |
Reconfigurable modulator-based optical add-and-drop multiplexer |
Oct. 23, 2007 |
| 7286763 |
Optical add/drop multiplexer having a banded channel configuration |
Oct. 23, 2007 |
| 7286732 |
Distributed optical structures designed by computed interference between simulated optical signals |
Oct. 23, 2007 |
| 7280761 |
Device and method for setting add signal level for OADM system |
Oct. 9, 2007 |
| 7277640 |
Optical add/drop multiplexing systems |
Oct. 2, 2007 |
| 7266299 |
Add/drop-drop and continue-module and drop and continue module |
Sep. 4, 2007 |
| 7263291 |
Wavelength division multiplexing source using multifunctional filters |
Aug. 28, 2007 |
| 7254293 |
Wavelength routing optical switch |
Aug. 7, 2007 |
| 7236704 |
Optical add/drop multiplexer utilizing variable optical attenuator |
Jun. 26, 2007 |
| 7231150 |
Method and apparatus for sensing a temperature along an optical path in semiconductor material |
Jun. 12, 2007 |
| 7231149 |
Bidirectional optical add-drop multiplexer |
Jun. 12, 2007 |
| 7224902 |
Optical encoding method and encoder for optical code division multiplexing |
May. 29, 2007 |
| 7224867 |
Holographic spectral filter |
May. 29, 2007 |
| 7221873 |
Network nodes with optical add/drop modules |
May. 22, 2007 |
| 7221872 |
On-line dispersion compensation device for a wavelength division optical transmission system |
May. 22, 2007 |
| 7209612 |
Two-stage optical bi-directional transceiver |
Apr. 24, 2007 |
| 7206509 |
Method and apparatus for temporally shifting one or more packets using wavelength selective delays |
Apr. 17, 2007 |
| 7203422 |
Optical network unit, wavelength splitter, and optical wavelength-division multiplexing access system |
Apr. 10, 2007 |
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