Multi-wavelength optical drive/sense readout for resonant microstructures
AssigneeHoneywell Inc.
InventorMark Lowell Wilson
Life of this patent
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Abstract
A method of driving and sensing a resonant sensor network wherein a least a one resonant sensor is driven by a first light from a first light source at a first frequency, wherein said first light source is modulated by an a.c. source. A second light source at a second frequency is utilized sense the resonant frequency of the at least one resonant sensor. Wherein said at least one resonant sensor modulates said second light source. The modulated light is provided to a photo detector and the first light source is filtered out of said reflected light. The detector ac amplifies the filtered reflected light, thereby detecting said the resonant frequency of the resonant sensor.
Claims19
A drive/sense network comprising;
- at least one resonant sensor;
- a drive laser for driving said at least one resonant sensor into resonance;
- a sense laser, said sense laser being at a different wavelength than said drive laser, said sense laser is modulated by said at least one resonant sensor,
- a band pass filter for passing the modulated sense laser;
- a detector for detecting the modulated frequency of the sense laser, said detector receiving the modulated sense laser from said band pass filter.
A drive/sense network comprising:
- a drive laser;
- a plurality of sense lasers;
- a plurality of lightly tapped linear networks coupled with said drive laser and said plurality of sense lasers, each of said lightly tapped linear networks comprising a plurality of resonant sensors;
- and
- a detector coupled to said plurality of lightly tapped linear networks, wherein said plurality of resonant sensors modulate a predetermined sense laser, said modulated sense laser is provided to said detection means, wherein said detection means detects the resonant frequency of the resonant sensor from the modulated sense laser.
A method of driving and sensing a resonant sensor network comprising the steps of:
- driving a least a one resonant sensor with a first light source at a first frequency, wherein said first light source is modulated by an a.c. source;
- providing a second light source at a second frequency to said at least one resonant sensor wherein said at least one resonant sensor modulates said second light source;
- reflecting said second light source;
- filtering said reflected light source to filter out said first light source;
- detecting said modulated frequency of said second light source.
Dependencies are inferred from the claim text.