Systems and methods for optical switching to colorless ports and colored ports
First Claim
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1. An apparatus comprising:
- an input port for launching an input signal including a plurality of wavelength channels;
an input dispersive element for demultiplexing the input signal into wavelength channels;
at least one colourless output port, each colourless output port for outputting a respective multiplexed output signal containing a combination of all wavelength channels switched to that colourless output port;
at least one output dispersive element, each outgoing dispersive element for multiplexing the wavelength channels switched to a respective colourless output port into a respective multiplexed output signal;
a plurality of coloured output ports, each for outputting only a respective predetermined demultiplexed wavelength channel switched to that coloured output port;
an optical element associated with the plurality of coloured output ports;
a wavelength selective arrangement adapted to selectively switch each of the plurality of wavelength channels of the input signal to a respective one of;
a) the at least one output dispersive element for multiplexing the selected wavelengths, and directing the multiplexed output signal to a selected colourless output port;
b) the optical element, which then routes the demultiplexed wavelength to the coloured output port of the plurality of coloured output ports that outputs that wavelength.
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Abstract
A wavelength selective switch is provided with a multiplexer such that both colourless (wavelength non-specific) and coloured (wavelength specific) ports are available. A waveguide device is employed with dispersive elements having different characteristics to realize the colourless and coloured ports within one waveguide device.
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Citations
34 Claims
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1. An apparatus comprising:
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an input port for launching an input signal including a plurality of wavelength channels; an input dispersive element for demultiplexing the input signal into wavelength channels; at least one colourless output port, each colourless output port for outputting a respective multiplexed output signal containing a combination of all wavelength channels switched to that colourless output port; at least one output dispersive element, each outgoing dispersive element for multiplexing the wavelength channels switched to a respective colourless output port into a respective multiplexed output signal; a plurality of coloured output ports, each for outputting only a respective predetermined demultiplexed wavelength channel switched to that coloured output port; an optical element associated with the plurality of coloured output ports; a wavelength selective arrangement adapted to selectively switch each of the plurality of wavelength channels of the input signal to a respective one of; a) the at least one output dispersive element for multiplexing the selected wavelengths, and directing the multiplexed output signal to a selected colourless output port; b) the optical element, which then routes the demultiplexed wavelength to the coloured output port of the plurality of coloured output ports that outputs that wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An integrated optical waveguide device comprising:
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an input arrayed waveguide having a first dispersion for launching an input signal including a plurality of wavelength channels, a plurality of first output arrayed waveguides each having substantially the first dispersion; for each of the plurality of first output arrayed waveguides, a respective first integrated optics coupling element adapted to couple light between the first output arrayed waveguide and a respective colourless output port; a second output arrayed waveguide having a second dispersion differing from said first dispersion; for the second output arrayed waveguide, a second integrated optics coupling element adapted to couple light between the second output arrayed waveguide and a plurality of coloured output ports; a plurality of routing elements for directing the wavelength channels from the input signal dispersed by the input arrayed waveguide to the first or second output arrayed waveguides; wherein, for each first output arrayed waveguide, the wavelength channels directed thereto are multiplexed and output the respective colorless output port; and wherein the first dispersion and the second dispersion differ enough such that after passing through the input arrayed waveguide, the second output arrayed waveguide and the second integrated optics coupling element, selected wavelength channels have a physical separation such that each wavelength channel is coupled to a respective one of the plurality of coloured output ports. - View Dependent Claims (9, 10)
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11. An apparatus comprising:
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an input optical port for receiving an input optical signal including a plurality of wavelength channels; at least one colourless output optical port; at least one coloured output optical port; an incoming dispersive element optically connected to the input optical port for demultiplexing the input optical signal; at least one outgoing dispersive element optically connected to the at least one colourless output optical port for multiplexing selected wavelength channels; a bulk optical element having optical power; a plurality of reflective routing elements; wherein for each wavelength channel; the incoming dispersive element and the bulk optical element disperses the wavelength channel towards a respective one of said plurality of routing elements, and the respective one of said plurality of routing elements directs the wavelength channel via the bulk optical element to a selected colourless output port via the respective outgoing dispersive element of the selected colourless output port or to a selected coloured output port, the selected colourless output port or the selected coloured output port being determined by the respective routing element; whereby wavelength channels routed to a given colourless output port are re-combined into a single multiplexed output signal for output the colourless port, and each wavelength channel routed to a given coloured output port remains demultiplexed and appears at the wavelength specific coloured port. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An arrangement comprising:
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at least one input port, at least one input dispersive element associated with the at least one input port; at least one colourless output port, at least one output dispersive element being associated with the at least one colourless output port; at least one set of coloured output ports; at least one bulk optical element; for each of a set of wavelength channels, a respective switching element adapted to redirect the wavelength channel; wherein the dispersive elements, the at least one bulk optical element and the switching elements are arranged to; demultiplex wavelength channels received at the at least one input port; redirect each wavelength channel towards one of a selected colourless output port or a selected set of coloured output ports; for each colourless output port, remultiplex any wavelength channels routed towards the colourless output port; for each set of coloured output ports, output wavelength channels individually without remultiplexing.
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34. A method comprising:
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using an input dispersive element, demultiplexing a multi-wavelength input signal into a plurality of wavelength channels; using a combination of switching elements and at least one bulk optical element, routing each of the plurality of wavelength channels to;
a selected one of a plurality of colourless output ports via a dispersive element associated with the selected colourless output port;
or a selected set of at least one set of coloured output ports;wherein for each colourless output port, any wavelengths routed to the colourless output port are combined to produce a colourless output; wherein for each set of coloured output ports, any wavelengths routed to the set of coloured output ports are output on wavelength channel specific output ports of the set.
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Specification