SYSTEMS AND METHODS FOR A HOLLOW CORE RESONANT FILTER
First Claim
1. A method for a hollow core resonant filter, the method comprising:
- transmitting a light beam through a first solid core fiber;
optically coupling the light beam from an end of the first solid core fiber to a first end of a hollow core fiber across a first free-space gap;
optically coupling the light beam from a second end of the hollow core fiber to an end of a second solid core fiber across a second free-space gap;
wherein the end of the second solid core fiber is coated to reflect the light beam as received from the second end of the hollow core fiber back across the second free-space gap into the second end of the hollow core fiber; and
wherein the end of the first solid core fiber is coated to reflect the light beam as received from the first end of the hollow core fiber back across the first free-space gap into the first end of the hollow core fiber.
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Accused Products
Abstract
Systems and methods for a hollow core resonant filter are provided. In one embodiment, a hollow-core fiber resonant cavity comprises: a hollow-core fiber having a first and second ends; a first and a second pigtail fiber each of solid core fiber material. A tip of the first pigtail is optically aligned with the first-end to couple light from the first pigtail to the hollow core fiber across a first free-space gap. A tip of the second pigtail is optically aligned with the second-end to couple light from the second pigtail to the hollow-core fiber across a second free-space gap. The tip of the second pigtail is coated to reflect light received from the second-end back across the second free-space gap into the second-end. The tip of the first pigtail is coated to reflect light received from the first-end back across the first free-space gap into the first-end.
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Citations
20 Claims
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1. A method for a hollow core resonant filter, the method comprising:
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transmitting a light beam through a first solid core fiber; optically coupling the light beam from an end of the first solid core fiber to a first end of a hollow core fiber across a first free-space gap; optically coupling the light beam from a second end of the hollow core fiber to an end of a second solid core fiber across a second free-space gap; wherein the end of the second solid core fiber is coated to reflect the light beam as received from the second end of the hollow core fiber back across the second free-space gap into the second end of the hollow core fiber; and wherein the end of the first solid core fiber is coated to reflect the light beam as received from the first end of the hollow core fiber back across the first free-space gap into the first end of the hollow core fiber. - View Dependent Claims (2, 3, 4, 5)
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6. A hollow core fiber resonant cavity, the resonant cavity comprising:
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a hollow core fiber having a first end and a second end; a first pigtail fiber of solid core fiber material; a second pigtail fiber of solid core fiber material; wherein a fiber tip of the first pigtail fiber is optically aligned with the first end of the hollow core fiber to couple light from the first pigtail fiber to the hollow core fiber across a first free-space gap; wherein a fiber tip of the second pigtail fiber is optically aligned with the second end of the hollow core fiber to couple light from the second pigtail fiber to the hollow core fiber across a second free-space gap; wherein the fiber tip of the second pigtail fiber is coated to reflect light received from the second end of the hollow core fiber back across the second free-space gap into the second end of the hollow core fiber; and wherein the fiber tip of the first pigtail fiber is coated to reflect light received from the first end of the hollow core fiber back across the first free-space gap into the first end of the hollow core fiber. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A resonant fiber optic gyroscope, the gyroscope comprising:
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a first laser source; a first hollow core fiber resonant cavity filter having an input end and an output end, wherein the first end of the first hollow core fiber resonant cavity filter is coupled to the first laser source; a rotation rate sensing loop having a first end and a second end; a first circulator coupled to the output end of the first hollow core fiber resonant cavity filter, a first photo-detector, and the first end of the rotation rate sensing loop, wherein the first circulator passes light received from the first hollow core fiber resonant cavity filter to the first end of rotation rate sensing loop, and light received from the first end of the rotation rate sensing loop to the first photo-detector; a second laser source; a second hollow core fiber resonant cavity filter having an input end and an output end, wherein the first end of the second hollow core fiber resonant cavity filter is an input coupled to the second laser source; a second circulator couple to the output end of the second hollow core fiber resonant cavity filter, a second photo-detector, and the second end of the rotation rate sensing loop, wherein the second circulator passes light received from the second hollow core fiber resonant cavity filter to the second end of the rotation rate sensing loop, and light received from the second end of the rotation rate sensing loop to the second photo-detector; wherein the first hollow core fiber resonant cavity filter and the second hollow core fiber resonant cavity filter each comprise; a hollow core fiber having a first end and a second end; a first pigtail fiber of solid core fiber material; a second pigtail fiber of solid core fiber material; wherein a fiber tip of the first pigtail fiber is optically aligned with the first end of the hollow core fiber to couple light from the first pigtail fiber to the hollow core fiber across a first free-space gap; wherein a fiber tip of the second pigtail fiber is optically aligned with the second end of the hollow core fiber to couple light from the second pigtail fiber to the hollow core fiber across a second free-space gap; wherein the fiber tip of the second pigtail fiber is coated to reflect light received from the second end of the hollow core fiber back across the second free-space gap into the second end of the hollow core fiber; and wherein the fiber tip of the first pigtail fiber is coated to reflect light received from the first end of the hollow core fiber back across the first free-space gap into the first end of the hollow core fiber. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification