Michelson interferometer based delay line interferometers
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First Claim
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1. An interferometer, comprising:
- means for splitting, at a splitting location, an input light beam into a first beam and a second beam;
means for recombining, at a recombination location, said first beam and said second beam to produce at least one output beam, wherein said first beam will travel a first optical path length (OPL) from said splitting location to said recombination location, wherein said second beam will travel a second OPL from said splitting location to said recombination location, wherein when said input light beam carries phase modulated data with a fixed time interval between two adjacent data symbols, then the difference in optical path lengths between said first OPL and said second OPL is about equal to said time interval multiplied by the speed of light;
a photodetector for detecting each said output beam, wherein said at least one output beam is coupled into said photodetector without at least one fiber optic between said recombination location and said photodetector; and
at least one lens operatively positioned between said recombination location and said photodetector.
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Abstract
An interferometer includes a means for splitting, at a splitting location, an input light beam into a first beam and a second beam; and means for recombining, at a recombination location, the first beam and the second beam. The interferometer is designed such that the first beam will travel a first optical path length (OPL) from the splitting location to the recombination location, and the second beam will travel a second OPL from the splitting location to the recombination location and such that when the input light beam has been modulated at a data rate comprising a time interval, then the difference in optical path lengths between the first OPL and the second OPL is about equal to the time interval multiplied by the speed of light.
13 Citations
13 Claims
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1. An interferometer, comprising:
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means for splitting, at a splitting location, an input light beam into a first beam and a second beam; means for recombining, at a recombination location, said first beam and said second beam to produce at least one output beam, wherein said first beam will travel a first optical path length (OPL) from said splitting location to said recombination location, wherein said second beam will travel a second OPL from said splitting location to said recombination location, wherein when said input light beam carries phase modulated data with a fixed time interval between two adjacent data symbols, then the difference in optical path lengths between said first OPL and said second OPL is about equal to said time interval multiplied by the speed of light; a photodetector for detecting each said output beam, wherein said at least one output beam is coupled into said photodetector without at least one fiber optic between said recombination location and said photodetector; and at least one lens operatively positioned between said recombination location and said photodetector. - View Dependent Claims (2, 3)
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4. An interferometer, comprising:
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means for splitting, at a splitting location, an input light beam into a first beam and a second beam; means for recombining, at a recombination location, said first beam and said second beam to produce at least one output beam, wherein said first beam will travel a first optical path length (OPL) from said splitting location to said recombination location, wherein said second beam will travel a second OPL from said splitting location to said recombination location, wherein when said input light beam carries phase modulated data with a fixed time interval between two adjacent data symbols, then the difference in optical path lengths between said first OPL and said second OPL is about equal to said time interval multiplied by the speed of light; and means for detecting each said output beam, wherein said at least one output beam comprises a first output beam and a second output beam, said interferometer further comprises means for adjusting the phase of one of said first output beam or said second output beam.
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5. An interferometer, comprising:
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means for splitting, at a splitting location, an input light beam into a first beam and a second beam; means for recombining, at a recombination location, said first beam and said second beam to produce at least one output beam, wherein said first beam will travel a first optical path length (OPL) from said splitting location to said recombination location, wherein said second beam will travel a second OPL from said splitting location to said recombination location, wherein when said input light beam carries phase modulated data with a fixed time interval between two adjacent data symbols, then the difference in optical path lengths between said first OPL and said second OPL is about equal to said time interval multiplied by the speed of light; and means for detecting each said output beam, wherein said interfereometer comprises a first optic comprising a first portion that is transparent to a wavelength of interest and a second portion that is reflective to said wavelength, a beam splitter with a beam splitter coating and a second optic comprising a third portion that is transparent to said wavelength and a fourth portion that is reflective to said wavelength, wherein said beam splitter coating is utilized as both said means for splitting and said means for recombining.
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6. An interferometer, comprising:
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means for splitting, at a splitting location, an input light beam into a first beam and a second beam; means for recombining, at a recombination location, said first beam and said second beam to produce at least one output beam, wherein said first beam will travel a first optical path length (OPL) from said splitting location to said recombination location, wherein said second beam will travel a second OPL from said splitting location to said recombination location, wherein when said input light beam carries phase modulated data with a fixed time interval between two adjacent data symbols, then the difference in optical path lengths between said first OPL and said second OPL is about equal to said time interval multiplied by the speed of light; and means for detecting each said output beam, wherein said means for recombining comprise a first reflector positioned to reflect said first beam, wherein said means for recombining further comprise a second reflector positioned to reflect said second beam. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification
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Litigation Data
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Current AssigneeOptoplex
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Original AssigneeOptoplex
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InventorsHsieh, Yung-Chieh
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Primary Examiner(s)HASAN, MOHAMMED A
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Application NumberUS11/485,653Publication NumberTime in Patent Office1,015 DaysField of Search359627-634, 359/578, 398/159, 398/141, 398/158, 398/208, 356/477, 250/339.02US Class Current359/634CPC Class CodesH04B 10/677 for differentially modulate...
