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Class Information
Number: 359/337.11
Name: Optical: systems and elements > Optical amplifier > Correction of deleterious effects > Spectral gain flattening or equalization > Feedback
Description: Subject matter including a path that returns some output back to the input of a circuit, wherein systems using this path, optical or electrical, to effect increased spectral uniformity, reduce or increase gain, etc.

Sub-classes under this class:

Class Number Class Name Patents
359/337.13 Adjusting input signal power 77
359/337.12 Using number of signals 83

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8614850 Method and apparatus for gain tilt compensation over fiber optic cable Dec. 24, 2013
8477030 Optical amplifier module and dispersion compensation fiber loss detection method Jul. 2, 2013
8451532 Control apparatus of optical amplifier May. 28, 2013
8320040 Multi-wavelength light amplifier Nov. 27, 2012
8224139 Tunable optical filter Jul. 17, 2012
8189256 Gain equalizer, optical amplifier, loss compensation method, and optical amplification method May. 29, 2012
8130802 Tunable laser Mar. 6, 2012
7990608 Optical transmission system Aug. 2, 2011
7969647 Apparatus and method for flattening gain profile of an optical amplifier Jun. 28, 2011
7969649 Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied Jun. 28, 2011
7765348 Configurable two-wire interface module Jul. 27, 2010
7715092 Dynamic raman tilt compensation May. 11, 2010
7688498 Optical amplifier and optical monitor circuit Mar. 30, 2010
7672042 Fast dynamic gain control in an optical fiber amplifier Mar. 2, 2010
7619812 Method and arrangement for the rapid adjustment of the tilt of optical WDM signals Nov. 17, 2009
7535629 Method and apparatus for controlling multiple-wavelength-pumped Raman amplifier and computer product May. 19, 2009
7474459 Multi-wavelength light amplifier Jan. 6, 2009
7460296 Compensation for spectral power tilt from scattering Dec. 2, 2008
7460297 Compensation for spectral power tilt from scattering Dec. 2, 2008
7443576 Compensation for spectral power tilt from scattering Oct. 28, 2008
7417790 Looped optical network with ASE light recirculation and link and network survivability control system Aug. 26, 2008
7375876 Optical transmitting apparatus having variable optical transmitting unit including plurality of paths May. 20, 2008
RE40270 Optical amplifying device Apr. 29, 2008
7324268 Optical signal amplifier and method Jan. 29, 2008
7221499 Frequency scanned array control system May. 22, 2007
7202996 Optical amplifier Apr. 10, 2007
7170673 Optical amplifying repeater apparatus and optical amplifying/repeating transmission system Jan. 30, 2007
7170672 Raman amplifier Jan. 30, 2007
7123404 Optical amplifier and optical amplification method Oct. 17, 2006
7119950 Amplification method and optical amplifier for wavelength division multiplexed signal light Oct. 10, 2006
7116908 Optical transmission system for substantially equalizing the output signal level among frequency bands and substantially lowering the signal-to-noise ratio Oct. 3, 2006
7092148 Optical communication system having dynamic gain equalization Aug. 15, 2006
7081988 Optical amplifier, communication system and method for control tilt of a communication system Jul. 25, 2006
7081987 Coordinated control of dynamic gain equalization in a wavelength division multiplexed optical system Jul. 25, 2006
7057802 Optical amplifier device Jun. 6, 2006
7046429 Method and system for span optical power control May. 16, 2006
7038843 Method and system for reducing Raman gain tilt error May. 2, 2006
7027217 Optical pulse generator and optical pulse testing instrument and method Apr. 11, 2006
7009761 Power tilt compensation using automatic power balance control Mar. 7, 2006
6992816 Apparatus and method for gain-spectrum-tilt compensation in long-wavelength band dispersion-compensating hybrid fiber amplifier Jan. 31, 2006
6977770 Optical amplifier and control method therefor Dec. 20, 2005
6972895 Long-wavelength optical fiber amplifier Dec. 6, 2005
6958856 Raman amplifier, raman amplifier control method, and optical communication system Oct. 25, 2005
6943937 Optical amplifier performance controller and method of use Sep. 13, 2005
6937387 System and method for automatic recovery from a control loop failure Aug. 30, 2005
6931196 Optical device including dynamic channel equalization Aug. 16, 2005
6922532 Optical performance monitoring for D/WDM networks Jul. 26, 2005
6917467 Optical amplifier Jul. 12, 2005
6906854 System and method for controlling noise in raman amplifiers Jun. 14, 2005
6873456 Optical amplifying repeater apparatus and optical amplifying/repeating transmission system Mar. 29, 2005

1 2 3

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