NOISE SUPPRESSION AND AMPLIFICATION SYSTEMS AND METHODS FOR COLORLESS OPTICAL ADD/DROP DEVICES
First Claim
1. A method for noise suppression in a colorless optical add/drop system implemented prior to a colorless optical add/drop device, the method comprising:
- subsequent to receiving an optical signal from an optical modem, performing an iterative search across all optical spectrum to provision a passband of the wavelength blocking filter;
filtering the optical signal with a wavelength blocking filter to suppress out of band Amplified Stimulated Emission (ASE) in order to prevent noise funneling in the colorless optical add/drop device; and
providing the filtered optical signal with the out of band ASE suppressed therein to an add port in the colorless optical add/drop device.
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Abstract
A method for noise suppression in a colorless optical add/drop system implemented prior to a colorless optical add/drop device includes, subsequent to receiving an optical signal from an optical modem, filtering the optical signal with a wavelength blocking filter to suppress out of band Amplified Stimulated Emission (ASE) in order to prevent noise funneling in the colorless optical add/drop device; and providing the filtered optical signal with the out of band ASE suppressed therein to a multiplexer port in the colorless optical add/drop device. The method can include, prior to the filtering, amplifying the optical signal with a single channel amplifier, wherein the single channel amplifier can include a pump laser shared with one or more additional single channel amplifiers.
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Citations
20 Claims
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1. A method for noise suppression in a colorless optical add/drop system implemented prior to a colorless optical add/drop device, the method comprising:
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subsequent to receiving an optical signal from an optical modem, performing an iterative search across all optical spectrum to provision a passband of the wavelength blocking filter; filtering the optical signal with a wavelength blocking filter to suppress out of band Amplified Stimulated Emission (ASE) in order to prevent noise funneling in the colorless optical add/drop device; and providing the filtered optical signal with the out of band ASE suppressed therein to an add port in the colorless optical add/drop device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for noise suppression in a colorless optical add/drop system, wherein the apparatus is located prior to a colorless optical add/drop device, the apparatus comprising:
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a housing comprising one or more input ports and one or more output ports; a filter array comprising one or more wavelength blocking filters each adapted to receive an optical signal from an optical modem connected to an input port, to filter the optical signal to suppress out of band Amplified Stimulated Emission (ASE) in order to prevent noise funneling in the colorless optical add/drop device, and to provide the filtered optical signal with the out of band ASE suppressed therein to an add port in the colorless optical add/drop device via an output port; and circuitry adapted to perform an iterative search across all optical spectrum to provision a passband of an associated wavelength blocking filter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A colorless Reconfigurable Optical Add/Drop Multiplexer (ROADM) node with noise suppression prior to a colorless optical add/drop device, the colorless ROADM node comprising:
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one or more colorless optical add/drop devices optically coupled to wavelength selective components at one or more directions; one or more optical modems; and a noise suppression module comprising a filter array comprising one or more wavelength blocking filters each adapted to receive an optical signal from an optical modem connected to an input port, to filter the optical signal to suppress out of band Amplified Stimulated Emission (ASE) in order to prevent noise funneling in the one or more colorless optical add/drop devices, and to provide the filtered optical signal with the out of band ASE suppressed therein to an add port in the one or more colorless optical add/drop devices via an output port, wherein the noise suppression module comprises circuitry adapted to perform an iterative search across all optical spectrum to provision a passband of an associated wavelength blocking filter. - View Dependent Claims (20)
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Specification