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Fiber-optic Gyroscope : Optoelectronics Library S. - Herve Lefevre

Fiber-optic Gyroscope

Optoelectronics Library S.

Hardcover Published: 19th December 1993
ISBN: 9780890065372
Number Of Pages: 332

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This reference presents a system analysis of the fibre-optic gyro. Drawing on 15 years of research and developments, it describes the concepts that have emerged as the preferred solutions for obtaining a practical device, and provides access to the information needed to know about optics, single-mode fibre optics and integrated optics to understand the fibre gyro.

Forewordp. xiii
Prefacep. xv
Introductionp. 1
Referencesp. 3
Principle of the Fiber-Optic Gyroscopep. 5
Sagnac Effectp. 5
Sagnac Interferometerp. 5
Case of a Mediump. 10
Active and Passive Ring Resonatorsp. 12
Ring Laser Gyroscope (RLG)p. 12
Resonant Fiber-Optic Gyroscope (R-FOG)p. 15
Passive Fiber Ring Interferometerp. 17
Principle of the Interferometric Fiber-Optic Gyroscope (I-FOG)p. 17
Theoretical Sensitivityp. 19
Noise, Drift, and Scale Factorp. 23
Bandwidthp. 24
Referencesp. 25
Reciprocity of a Fiber Ring Interferometerp. 27
Principle of Reciprocityp. 27
Reciprocity of Wave Propagationp. 27
Reciprocal Behavior of a Beam Splitterp. 28
Minimum Configuration of a Ring Fiber Interferometerp. 30
Reciprocal Configurationp. 30
Reciprocal Biasing Modulation-Demodulationp. 32
Proper (or Eigen) Frequencyp. 37
Reciprocity With All-Guided Schemesp. 43
Evanescent-Field Coupler (or X-Coupler or 4-Port Coupler)p. 43
Y-Junctionp. 46
All-Fiber Approachp. 50
Hybrid Architectures With Integrated Optics: Optimal "Y-Tap" or "Y-Coupler" Configurationp. 51
Problem of Polarization Reciprocityp. 55
Rejection Requirement With Ordinary Single-Mode Fiberp. 55
Use of Polarization-Preserving Fiberp. 58
Use of Depolarizerp. 59
Use of an Unpolarized Sourcep. 59
Referencesp. 61
Backreflection and Backscatteringp. 63
Problem of Backreflectionp. 63
Reduction of Backreflection With Slant Interfacesp. 63
Influence of Source Coherencep. 66
Problem of Backscatteringp. 67
Coherent Backscatteringp. 67
Use of a Broadband Sourcep. 68
Evaluation of the Residual Rayleigh Backscattering Noisep. 69
Referencesp. 72
Analysis of Polarization Nonreciprocities With Broadband Source and High-Birefringence Fiberp. 73
Depolarization Effect in High-Birefringence Polarization-Preserving Fibersp. 73
Analysis of Polarization Nonreciprocities in a Fiber Gyroscope Using an All-Polarization-Preserving Waveguide Configurationp. 75
Intensity-Type Effectsp. 75
Comment About Length of Depolarization L[subscript d] vs. Length of "Polarization Correlation" L[subscript pc]p. 80
Amplitude-Type Effectsp. 83
Use of a Depolarizerp. 84
Testing With Optical Coherence Domain Polarimetry (OCDP) Based on Path-Matched White-Light Interferometryp. 86
Referencesp. 91
Transience-Related Drift and Noisep. 93
Effect of Temperature Transiencep. 93
Effect of Acoustic Noise and Vibrationp. 96
Referencesp. 96
Truly Nonreciprocal Effectsp. 97
Magneto-Optic Faraday Effectp. 97
Nonlinear Kerr Effectp. 101
Referencesp. 106
Scale Factor Accuracyp. 107
Problem of Scale Factor in the Interferometric Fiber Gyroscopep. 107
Closed-Loop Operationp. 108
Use of a Frequency Shiftp. 108
Analog Phase Ramp or Serrodyne Modulationp. 111
Digital Phase Rampp. 115
All-Digital Closed-Loop Processing Methodp. 121
Wavelength Controlp. 126
Wavelength Dependence of a Ring Interferometer With a Broadband Sourcep. 126
Effect of Phase Modulationp. 129
Wavelength Control Schemesp. 130
Referencesp. 132
Technology of the I-FOGp. 135
Recapitulation of the Optimal Operating Conditionsp. 135
Sourcep. 136
Superluminescent Diodep. 136
Rare-Earth Doped Fiber Sourcesp. 138
Fiber Coilp. 140
"Heart" of the Interferometerp. 141
Detectorp. 142
Referencesp. 144
Alternative Approaches for the I-FOGp. 147
Alternative Optical Configurationsp. 147
Alternative Signal Processing Schemesp. 149
Open-Loop Scheme With Use of Multiple Harmonicsp. 149
Second Harmonic Feedbackp. 149
Gated Phase Modulation Feedbackp. 150
Heterodyne and Pseudo-Heterodyne Schemesp. 151
Beat Detection With Phase Ramp Feedbackp. 153
Dual Phase Ramp Feedbackp. 155
Extended Dynamic Range With Multiple Wavelength Sourcep. 155
Referencesp. 157
Resonant Fiber-Optic Gyroscope (R-FOG)p. 159
Principle of Operation of an All-Fiber Ring Cavityp. 159
Signal Processing Methodp. 163
Reciprocity of a Ring Fiber Cavityp. 165
Parasitic Effects in the R-FOGp. 168
Referencesp. 169
Applications and Trendsp. 173
Present State of Developmentp. 173
Trends for the Future and Concluding Remarksp. 174
Referencesp. 175
Basics of Opticsp. 177
Optical Wave in a Vacuump. 177
Polarization of an Optical Wavep. 181
Propagation in a Dielectric Mediump. 185
Geometrical Opticsp. 193
Dielectric Interface: Reflection, Refraction, and Waveguidancep. 194
Interferencesp. 198
Multiple-Wave Interferencesp. 205
Diffraction and Gaussian Beamp. 208
Coherencep. 212
Birefringencep. 225
Bibliographyp. 231
Basics of Single-Mode Fiber Opticsp. 233
Discrete Modal Guidance in a Step Index Fiberp. 233
Single-Mode Fiberp. 237
Practical Silica Single-Mode Fibersp. 244
Coupling in a Single-Mode Fiberp. 245
Birefringence in a Single-Mode Fiberp. 252
Polarization-Preserving Fibersp. 257
Interference With Single-Mode Fibers and Related Componentsp. 266
Bibliographyp. 271
Basics of Integrated Opticsp. 273
Integrated-Optic Channel Waveguidep. 273
LiNbO[subscript 3] Integrated Opticsp. 276
Proton-Exchanged Waveguidesp. 281
Bibliographyp. 284
Electromagnetic Theory of the Relativistic Sagnac Effectp. 285
Special Relativity and Electromagnetismp. 285
Electromagnetism in a Rotating Framep. 294
Case of a Rotating Toroidal Dielectric Waveguidep. 297
Bibliographyp. 299
Symbolsp. 301
About the Authorp. 307
Indexp. 309
Table of Contents provided by Syndetics. All Rights Reserved.

ISBN: 9780890065372
ISBN-10: 0890065373
Series: Optoelectronics Library S.
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 332
Published: 19th December 1993
Publisher: Artech House Publishers
Country of Publication: US
Dimensions (cm): 22.9 x 15.2  x 2.2
Weight (kg): 0.67