Method and apparatus for generating return-to-zero modulated optical signals
AssigneeLucent Technologies Inc.
InventorAnatoliy Marhelyuk
Life of this patent
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Abstract
A method and apparatus for applying an electrical signal as a first of two inputs to a logic element, manipulating the output of the logic element such that the logic element produces a resulting electrical signal that logically transitions only when the input signal has associated with it a predetermined logic state, shaping the resulting electrical signal according to a desired RZ optical signal, amplifying the shaped electrical signal such that a maximum and a minimum signal level of the shaped electrical signal correspond to the adjacent optical power transfer zeroes of an optical modulator, and applying the amplified electrical signal as a driver input to the optical modulator.
Claims15
A method for generating return-to-zero (RZ) optical signals, comprising:
- applying an electrical signal to a first input of a logic element;
- manipulating the output of the logic element such that said logic element produces a resulting electrical signal that logically transitions only when the input signal has associated with it a predetermined logic state;
- shaping said resulting electrical signal according to a desired RZ optical signal;
- amplifying the shaped electrical signal such that a maximum and a minimum signal level of the shaped electrical signal correspond to the adjacent optical power transfer zeroes of an optical modulator;
- and
- applying the amplified electrical signal as a driver input to the optical modulator.
An apparatus for generating return-to-zero optical signals, comprising:
- a logic element for receiving electrical signals as a first input to said logic element;
- a manipulating element for manipulating the output of the logic element such that said logic element produces a resulting electrical signal that logically transitions only when the input signal has associated with it a predetermined logic state;
- a pulse shaping element for shaping said resulting electrical signal according to a desired RZ optical signal;
- an amplifier, for amplifying the shaped electrical signal such that a maximum and a minimum signal level of the shaped electrical signal correspond to the adjacent optical power transfer zeroes of an optical modulator;
- and
- an optical modulator for varying the intensity of an input continuous light source in proportion to a voltage applied to it by the amplified electrical signal.
An apparatus for generating return-to-zero optical signals, comprising:
- a means for applying an electrical signal to a first input of a logic element;
- a means for manipulating the output of the logic element such that said logic element produces a resulting electrical signal that logically transitions only when the input signal has associated with it a predetermined logic state;
- a means for shaping said resulting electrical signal according to a desired RZ optical signal;
- a means for amplifying the shaped electrical signal such that a maximum and a minimum signal level of the shaped electrical signal correspond to the adjacent optical power transfer zeroes of an optical modulator;
- and
- a means for applying the amplified electrical signal as a driver input to the optical modulator.
Dependencies are inferred from the claim text.