Optical systems including add drop devices and methods
First Claim
1. An optical system comprising:
- at least a first optical transmitter configured to transmit information via optical signals including at least one signal wavelength;
an add/drop device configured to receive the optical signal from said first optical transmitter, said add/drop device including;
a 1×
N device having an input port for receiving optical signals from the transmitter, and having N output ports, wherein one of the output ports is part of an input path;
a first selective element configurable to pass a first signal wavelength from said input path to a first add/drop path and pass continuing signal wavelengths differing from the first signal wavelength to a second add/drop path;
a second selective element configurable to pass a second signal wavelength from said first add/drop path and continuing signal wavelengths differing from the second signal wavelength from said second add/drop path to an output path and pass the second signal wavelength from said second add/drop path and signal wavelengths differing from the second signal wavelength from said first add/drop path to a drop path;
an N×
1 device having an output port for providing output signals from the add/drop device, and having N input ports, wherein one of the input ports is part of the output path, and wherein at least one other of the input ports is connected to at least one corresponding output port of the 1×
N device;
at least a first optical receiver configured to receive the output signal from said add/drop device; and
at least a second optical receiver configured to receive the drop signal from said add/drop device.
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Accused Products
Abstract
Optical systems of the present invention include an add/drop device and/or cross-connect device, which is reconfigurable to add and drop signal wavelengths between one or more transmission paths. The add/drop device includes a first selective element configurable to pass a first group of signal wavelengths including at least a first signal wavelength from an input path to a first add/drop path and pass continuing signal wavelengths differing from the first group of signal wavelength to a second add/drop path. A second selective element is provided that is configurable to pass a second group of signal wavelengths including at least a second signal wavelength from said first add/drop path and continuing signal wavelengths differing from the second group of wavelengths from said second add/drop path to an output path. The second selective element is further configured to pass the second group of signal wavelengths from said second add/drop path and wavelengths differing from the second wavelength from said first add/drop path to a drop path. The add/drop device may also include an add path to introduce add signal wavelengths directly to the output path or via at least one of the first and second selective elements.
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Citations
28 Claims
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1. An optical system comprising:
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at least a first optical transmitter configured to transmit information via optical signals including at least one signal wavelength;
an add/drop device configured to receive the optical signal from said first optical transmitter, said add/drop device including;
a 1×
N device having an input port for receiving optical signals from the transmitter, and having N output ports, wherein one of the output ports is part of an input path;
a first selective element configurable to pass a first signal wavelength from said input path to a first add/drop path and pass continuing signal wavelengths differing from the first signal wavelength to a second add/drop path;
a second selective element configurable to pass a second signal wavelength from said first add/drop path and continuing signal wavelengths differing from the second signal wavelength from said second add/drop path to an output path and pass the second signal wavelength from said second add/drop path and signal wavelengths differing from the second signal wavelength from said first add/drop path to a drop path;
an N×
1 device having an output port for providing output signals from the add/drop device, and having N input ports, wherein one of the input ports is part of the output path, and wherein at least one other of the input ports is connected to at least one corresponding output port of the 1×
N device;
at least a first optical receiver configured to receive the output signal from said add/drop device; and
at least a second optical receiver configured to receive the drop signal from said add/drop device. - View Dependent Claims (2, 3)
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4. An optical add/drop device comprising:
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a 1×
N device having an input port for receiving optical signals and having N output ports, wherein one of the output ports is part of an input path;
a first selective element configurable to pass at least a first signal wavelength from the input path to a first add/drop path and pass continuing signal wavelengths differing from the first signal wavelength to a second add/drop path;
a second selective element configurable to pass at least a second signal wavelength from said first add/drop path and continuing signal wavelengths differing from the second signal wavelength from said second add/drop path to an output path and pass the second signal wavelength from said second add/drop path and signal wavelengths differing from the second signal wavelength from said first add/drop path to a drop path; and
an N×
1 device having an output port and having N input ports, wherein one of the input ports is part of the output path, and wherein at least one other of the input ports is connected to at least one corresponding output port of the 1×
N device. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification