SINGLE MODE (SM) FIBER OPTICAL READER SYSTEM AND METHOD FOR INTERROGATING RESONANT WAVEGUIDE-GRATING SENSOR (S)
First Claim
1. A system, comprising:
- a light source;
a light detector; and
a dual fiber collimator launch/receive system which includes;
a first single mode optical fiber;
a second single mode optical fiber; and
a lens, wherein said first single mode optical fiber is interfaced with the light source, wherein said second single mode optical fiber is interfaced with the light detector, wherein said first and second single mode optical fibers are physically separated from said lens and said lens is physically separated from a biosensor.
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Abstract
An optical reader system is described herein which has a single mode (SM) optical fiber launch/receive system that uses one or more SM optical fibers to interrogate a biosensor and does not use multimode (MM) optical fibers to interrogate the biosensor. The use of the SM optical fiber launch/receive system effectively reduces angular sensitivity, reduces unwanted system reflections, improves overall angular tolerance, and improves resonant peak reflectivity and resonant peak width. Two specific embodiments of the SM optical fiber launch/receive system are described herein which include: (1) a dual fiber collimator launch/receive system; and (2) a single fiber launch/receive system that interrogates the biosensor at a normal incidence.
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Citations
10 Claims
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1. A system, comprising:
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a light source; a light detector; and a dual fiber collimator launch/receive system which includes; a first single mode optical fiber; a second single mode optical fiber; and a lens, wherein said first single mode optical fiber is interfaced with the light source, wherein said second single mode optical fiber is interfaced with the light detector, wherein said first and second single mode optical fibers are physically separated from said lens and said lens is physically separated from a biosensor. - View Dependent Claims (2)
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3. A method for interrogating a biosensor, said method comprising the steps of:
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using an interrogation system including a light source, a light detector, and a dual fiber collimator launch/receive system, where the dual fiber collimator launch/receive system comprises; a first single mode optical fiber; a second single mode optical fiber; and a lens, wherein said first single mode optical fiber is interfaced with the light source, wherein said first and second single mode optical fibers are physically separated from said lens and said lens is physically separated from said biosensor, wherein said first single mode optical fiber emits a light beam generated by said light source such that the emitted light beam is passed through said lens before interfacing with the biosensor, wherein said biosensor reflects the light beam such that the reflected light beam passes through said lens and said second single mode optical fiber and is received by the light detector; and moving said biosensor relative to said dual fiber collimator launch/receive system which enables the emitted light beam to be scanned across different areas on said biosensor while interrogating said biosensor. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification