Improving fiber optic gyroscope performance using a single-frequency laser
Abstract/Contents
- Abstract
- The fiber optic gyroscope has become the most commercially successful fiber sensor to date and has been deployed in a variety of applications requiring high sensitivity, low noise measurements of rotation rate. Yet despite this success, traditional broadband source-driven gyroscopes have failed to reach their ultimate potential as the primary rotation sensors for inertial navigation applications -- such as guidance in airplanes and ships -- being passed over in favor of more costly and relatively more complicated technologies. Achieving the performance levels necessary for these demanding applications using a broadband source has proven challenging. To overcome these challenges, we propose a simple but significant alteration to the standard gyroscope configuration: replace the traditional broadband source with a single-frequency laser. While initial experimental work on fiber optic gyroscopes employed laser sources, researchers quickly abandoned this approach following the discovery that a broadband source could mitigate the deleterious effects of fiber backscattering, as well as polarization and nonlinear effects. As a result, a thorough analysis of these effects was never carried out. We present a more robust analysis with particular focus on backscattering and show that the induced noise and drift in a laser-driven gyroscope can meet navigation-grade requirements. Achieving this improvement requires careful selection of the laser linewidth and phase modulation scheme. These performance gains comes with the added benefit that a laser-driven gyroscope does not suffer from source beating noise and high scale factor instability, two limiting factors for broadband source-driven gyroscopes. We present experimental results that verify our theoretical predictions and compare the experimental performance of our laser-driven gyroscope with a broadband source-driven gyroscope.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2014 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Lloyd, Seth Willis |
|---|---|
| Associated with | Stanford University, Department of Electrical Engineering. |
| Primary advisor | Fan, Shanhui, 1972- |
| Thesis advisor | Fan, Shanhui, 1972- |
| Thesis advisor | Digonnet, Michel J. F |
| Thesis advisor | Solgaard, Olav |
| Advisor | Digonnet, Michel J. F |
| Advisor | Solgaard, Olav |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Seth Willis Lloyd. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2014. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2014 by Seth Willis Lloyd
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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