FIBER OPTIC RESONANT RING SENSOR AND SOURCE
Assignee
CHARLES STARK DRAPER LABORATORY, INC., THE, A CORP. OF MA
Filed
Dec 15, 1989
Granted
Feb 28, 1995
Location
Cambridge MA (Draper Lab/MIT)
Abstract
Light from a laser diode is coupled into a fiber ring to narrow the line width. In one embodiment, Rayleigh backscattered light from the fiber is returned to the laser diode, and has the effect of greatly narrowing the diode output. In another embodiment the fiber ring is a double core ring, or a ring of plural spatially contiguous fibers. The laser diode is coupled into one core to narrow its line width, while the line-narrowed output is applied to another core which serves as a sensing device such as a gyro. Minimal or no compensation is needed to track the laser frequency to the ring resonance. In one embodiment, the first core is doped to produce a gain medium which lases at a center frequency that tracks the resonance of the sensing core as it drifts due to environmental effects.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Nov 2, 1990
Rescinded
Jul 29, 1994
Duration
3 years, 9 months
Inventor
- 1BRUCE PORTER
Sensitive facility: Cambridge MA (Draper Lab/MIT)
Record Details
- Patent number
- US 5394242
- Application
- 07451503
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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CHARLES STARK DRAPER LABORATORY, INC., THE, A CORP. OF MAMore from this assignee
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