Method and system for suppressing ASE noise
AssigneeAlcatel-Lucent USA Inc.
InventorsAndreas Benz, Peter Winzer, Bernd Teichmann
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Abstract
A bandstop filter method and system for suppressing ASE noise is disclosed. In one embodiment of the bandstop filter system, there is provided a first switch, having an input port for receiving an optical signal, and two output ports; a bandstop filter coupled to a first of the two output ports of the first switch; and a second switch, having two input ports and one output port, wherein a first of the two input ports of the second switch is coupled to the bandstop filter and a second of the two input ports of the second switch is coupled to a second of the two output ports of the first switch.
Claims20
A bandstop filter system for suppressing ASE noise, comprising:
- a first switch, having an input port for receiving an optical signal, and two output ports;
- a bandstop filter coupled to a first of the two output ports of the first switch;
- and
- a second switch, having two input ports and one output port, wherein a first of the two input ports of the second switch is coupled to the bandstop filter and a second of the two input ports of the second switch is coupled to a second of the two output ports of the first switch.
A bandstop filter system for suppressing ASE noise, comprising:
- an optical coupler, having an input port for receiving an optical signal, and two output ports;
- a bandstop filter coupled to a first of the two output ports of the optical coupler;
- and
- a switch, having two input ports and one output port, wherein a first of the two input ports of the switch is coupled to the bandstop filter and a second of the two input ports of the switch is coupled to a second of the two output ports of the coupler.
A free space optics device for suppressing ASE noise, comprising:
- a fiber segment for transmitting an optical signal, the fiber segment having a first portion and a second portion;
- first and second lenses coupled between the first and second portions of the fiber segment;
- and
- a movable bandstop filter, adapted to be positioned between the first and second lenses.
A method for suppressing ASE noise in a single channel optical amplifier;
- comprising:
- receiving an optical signal for transmission to an input of the optical amplifier;
- determining the wavelength region in which the received optical signal falls;
- and
- coupling a bandstop filter to the output of the optical amplifier if the determined wavelength region of the optical signal is outside the gain peak of the optical amplifier.
Dependencies are inferred from the claim text.