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Class Information
Number: 359/337.2
Name: Optical: systems and elements > Optical amplifier > Correction of deleterious effects > Filtering (e.g., noise)
Description: Subject matter wherein the frequency band of the amplifier is restricted to the frequency band of the pulses being transmitted.

Sub-classes under this class:

Class Number Class Name Patents
359/337.21 Grating 87
359/337.22 Interferometer or interference 19

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8593723 Method of manufacturing variable wavelength interference filter and variable wavelength interference filter Nov. 26, 2013
8559746 System, method, and apparatus for smoothing of edges in images to remove irregularities Oct. 15, 2013
8514484 Optical amplifier and optical fiber Aug. 20, 2013
8433199 System and method for nonlinear self-filtering via dynamical stochastic resonance Apr. 30, 2013
8358461 Wavelength-tunable light source Jan. 22, 2013
8351111 Cascaded raman fiber laser system based on filter fiber Jan. 8, 2013
8320039 Cladding-pumped optical amplifier having reduced susceptibility to spurious lasing Nov. 27, 2012
8294981 Optical amplifiers using switched filter devices Oct. 23, 2012
8248688 Tandem photonic amplifier Aug. 21, 2012
8179932 Pulse laser apparatus, terahertz measuring apparatus, and terahertz tomographic apparatus May. 15, 2012
8130802 Tunable laser Mar. 6, 2012
8102595 Optical transmission system with optical amplifier gain setup based on difference between signal loss and noise light loss Jan. 24, 2012
8081376 Multi-stage fiber amplifier to suppress Raman scattered light Dec. 20, 2011
8064130 Optical amplifier Nov. 22, 2011
8045259 Active optical fibers with wavelength-selective filtering mechanism, method of production and their use Oct. 25, 2011
8004753 Optical amplifier, fiber laser, and method of eliminating reflected light Aug. 23, 2011
7953130 Pulse laser apparatus, terahertz measuring apparatus, and terahertz tomographic apparatus May. 31, 2011
7940452 Method for acquiring spectrum shape of a gain flattening filter in an optical amplifier May. 10, 2011
7916385 Apparatus and methods for optical communication Mar. 29, 2011
7864410 Optical active device having optical amplifying sections cascaded on a path for propagating input light with a predetermined wavelength Jan. 4, 2011
7843629 Periodically filtered broadband light source Nov. 30, 2010
7646532 Optical device for suppressing double Rayleigh backscattering noise, and an installation including the device Jan. 12, 2010
7618201 Optical module Nov. 17, 2009
7570420 Systems and methods for transmitting quantum and classical signals over an optical network Aug. 4, 2009
7525725 Optical amplification module, optical amplifier, optical communication system, and white light source Apr. 28, 2009
7511881 Amplified spontaneous emission reflector-based gain-clamped fiber amplifier Mar. 31, 2009
7508577 Method and system for suppressing ASE noise Mar. 24, 2009
7489440 Optical spectral filtering and dispersion compensation using semiconductor optical amplifiers Feb. 10, 2009
7440170 Method and apparatus for monitoring optical signal-to-noise ratio Oct. 21, 2008
7421168 Integrated optical channelizer Sep. 2, 2008
7354772 Tag free bio sensing micro strip Apr. 8, 2008
7345811 Multimode fiber optic amplifier and method of amplifying optical signals Mar. 18, 2008
7262904 Tunable optical add/drop device Aug. 28, 2007
7253944 Multi-stage raman amplifier Aug. 7, 2007
7224516 Multimode fiber optic amplifier and method of amplifying optical signals May. 29, 2007
7142782 Noise light elimination method, noise light elimination apparatus and optical transmission system, using stimulated brillouin scattering Nov. 28, 2006
7106501 Fiber amplifier with suppression of amplified spontaneous emission Sep. 12, 2006
7072100 Optical amplifier and gain tilt compensation method Jul. 4, 2006
6943938 Tunable wavelength filter with invariant transmission and reflection beam angles Sep. 13, 2005
6894830 Bi-directional optical-amplifier module May. 17, 2005
6829410 Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Dec. 7, 2004
6810214 Method and system for reducing degradation of optical signal to noise ratio Oct. 26, 2004
6751011 Characteristic measuring method and characteristic measuring system of wavelength division multiplexing optical amplifier Jun. 15, 2004
6744941 Optical wavelength tunable filter Jun. 1, 2004
6738183 Optical filter functioning as both a gain equalizer and noise-light blocking filter May. 18, 2004
6674566 Raman amplification Jan. 6, 2004
6646789 Single parameter gain slope adjuster for an optical system Nov. 11, 2003
6618193 Optical amplification systems and methods Sep. 9, 2003
6611371 Single parameter gain slope adjuster for an optical system Aug. 26, 2003
6583923 Optical fiber amplifier Jun. 24, 2003

1 2 3

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