Invention Grant
- Patent Title: Constant optical power sensor using a light source current servo combined with digital demodulation intensity suppression for radiation and vibration insensitivity in a fiber optic gyroscope
- Patent Title (中): 使用光源电流伺服的数字光功率传感器结合数字解调强度抑制在光纤陀螺仪中的辐射和振动不敏感
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Application No.: US12943352Application Date: 2010-11-10
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Publication No.: US08213018B2Publication Date: 2012-07-03
- Inventor: Douglas E. Smith , Steven J. Sanders , Derek Mead
- Applicant: Douglas E. Smith , Steven J. Sanders , Derek Mead
- Applicant Address: US NJ Morristown
- Assignee: Honeywell International Inc.
- Current Assignee: Honeywell International Inc.
- Current Assignee Address: US NJ Morristown
- Agency: Fogg & Powers LLC
- Main IPC: G01C19/72
- IPC: G01C19/72
Abstract:
Systems and methods for fiber-optic gyroscopes are provided. In one embodiment, a fiber-optic gyroscope comprises: a light source current servo coupled to a light source that transmits light through an optic path, wherein the light source current servo controls intensity of light through the optic path via a light source current drive that supplies current to power the light source; and an intensity control signal processor coupled to the optic path via a photo detector, wherein the intensity control signal processor outputs an intensity control signal to the light source current servo, wherein the intensity control signal is a function of intensity of light as received at the photo detector; wherein the light source current servo compares the intensity control signal against a stable analog voltage reference to adjust the light source current drive and drive optical power at the photo detector towards a constant level.
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