Index termsinterference fiber optic gyroscope ifog. However, this situation changed with the reduction in cost of commercially available fiber optic gyroscopes fogs. A fibreoptic gyroscope fog senses changes in orientation using the sagnac effect, thus performing the function of a mechanical gyroscope. The fiberoptic gyroscope, second edition, lefevre, herve c. Sagnac effect, reciprocity, allfiber components, integrated optics, signal processing principles, and recent trends like multiaxis gyro with source sharing or multiplexing, and erbiumdoped fiber source. Fiber optic gyroscope, sagnac interferometer, edfa, amplified. However its principle of operation is instead based on the interference of light which has passed through a coil of optical fibre, which can be. Protonexchanged linbo 3 integratedoptic circuit very high polarizer rejection manufactured by ixblue. A laserdiode source is used to reduce coherent scattering effects. A novel design of fiber optic gyroscope based ins system. Fundamentals of the interferometric fiber optic gyroscope. Osa drift of an optical fiber gyroscope caused by the.
Pdf write how often is sync needed to keep data windows central forums i o port. The proportionality factor that precedes the rotationratio is known as the scalefactor sf of the gyroscope. The fiberoptic gyroscope started to be investigated 35 years ago, opening the way for a fully solidstate rotation sensor. Thanks to the ultralow propagation loss in optic fibers, ifogs was able to achieve extremely high sensitivity and has become a mature technology for inertial navigation systems 1. We present an optical fiber gyroscope that, for the first time, is composed completely of singlemode fiberoptic components. Analysis and optimization of dynamic measurement precision. The fiberoptic gyroscope, a century after sagnacs experiment. The latest example is the new tracvision g8 antenna from kvh industries, which uses fiberoptic gyro stabilization, an internal gps engine and chipbased mass data storage to allow the same satellite broadbandtv reception on midrange yachts that larger antennas offer. For the moment, they make use of mechanical gyroscopes or gas laser gyroscopes. Data from the fiberoptic gyroscope was collected and logged at 10 hz via digital computer while volunteer participants performed a number of standard driving maneuvers and invehicle tasks. At present time fiberoptic gyroscope s fogs with closedloop feedback schem e of operation are becoming widely used in inertial navigation com plexes 12. With a 7 year legacy of winding all types of precision optical fiber coils, idealphotonics has the coil winding business unit with a team of highly experienced scientists, engineers, and winders, together capable of winding the best in optical fiber coils in accordance with customers requirements. Optical part this part is a fiber optic ring interferometer comprising fiber coil, phase modulator, two fused fiber optic couplers, fiber optic polarizer, super luminescent light module. S 55 avenue auguste renoir, marlyleroi, france yves.
It also describes the technological progresses of guidedwave components singlemode optical fiber, semiconductor diode source, integrated. A fiberoptic gyroscope is a device that measures rotational movement of the platform or object it is on through the use of fiberoptic technology. Napolitano 102010 fabien napolitano ixsea, an ixblue company chief product development officer 1 introduction this paper is a short analysis of key technological advantages of fiberoptic gyroscope fog technology for high performance applications over competing technologies. The fiberoptic gyroscope started to be investigated in the mid 70s, opening the way for a fully solidstate rotation sensor. Arditty et al, fiberoptic gyroscope with a multifunction integrated optical circuit, proceeding of the topical meeting on integrated and guidedwave optics, pdp 10 asilomar, california, 1982. Guattari and others published a simple optical technique to compensate for. The mechanism of its reduction using polarizationmaintaining optical fiber is clarified. As it is wellknown, a fiberoptic gyroscope uses a broadband source which drastically. A compact fiber optic gyroscope including a first housing. His doctorate research was performed at thales formerly thomsoncsf central research laboratory and his thesis subject was pioneering work on the fiberoptic gyroscope. Allsinglemode fiberoptic gyroscope with longterm stability. Fiber optic rate gyros as replacements for mechanical gyros. Pdf highprecision fiber optical gyroscope with extended. Both optical gyroscopes, the ringlaser gyro rlg and the fiberoptic gyro fog, are.
The fiberoptic gyroscope, second edition kindle edition by lefevre, herve c download it once and read it on your kindle device, pc, phones or tablets. Ifog coil winding quadrupole wet, dry, flanged, hubbed or freestanding. Use features like bookmarks, note taking and highlighting while reading the fiberoptic gyroscope, second edition. Integrated optical chip for fiber optical gyroscope fabricated by high temperature proton exchange, in the. However its principle of operation is instead based on the interference of light which has passed through a coil of optical fibre, which can be as long as 5 kilometres 3 mi. The drift of an optical fiber gyroscope caused by the earths magnetic field through the faraday effect is studied theoretically in a simple model and also in a practical model. Pdf a simple optical technique to compensate for excess rin in a. Saabs fiber optic gyros, fog, are designed to provide maximum stabilisation in tough environments.
Sledbased gyroscopes rely on the large bandwidth of the source to reduce both the large kerr induced drift and the high coherent backscattering noise along the fiber as well as to minimize noise from reflections at the facets of the internal optical components, which could decrease the. It was firstly seen as limited to mediumgrade applications, but today, it reaches ultimate theoretical performance and surpasses its wellestablished competitor, the ring laser gyroscope, in terms of bias noise and longterm stability. Integrated optical driver for interferometric optical gyroscopes. In these equations, l is the length of the fiber optic coil and d is the diameter of the fiber optic coil. Both optical gyroscopes, the ringlaser gyro rlg and the fiberoptic gyro fog, are based on the same sagnac effect, which shows that light traveling along a closed ring path in opposite directions allows one to detect rotation with respect to inertial space. The configuration is a multiturn sagnac interferometer. Over one turn as in the original experiment 100 years ago, the effect is extremely weak but it can be increased with. This reference presents a system analysis of the fibreoptic gyro. Scope of the presentation 4 the fiber optic gyroscope shall be described within this presentation, at first focusing on the interferometric roots according to sagnacs effect. Former fbi negotiator chris voss at the australia real estate conference duration. Fundamentals of the interferometric fiberoptic gyroscope. This platform can be anything that moves, including a car, boat, airplane or spacecraft. For example, the kvh ecore rd2100 gyro 1, 2, which was the model used in our. Introduction fog are the latest inertial sensors that have replaced the traditional mechanical gyroscopes 1, owing to promising advantages like no moving parts, substantially nil loss, negligible wear, long life, vibration resistance and shock resistance, flexibility.
We first implement this idea by combining the input reference and the signal. Lefevre fiber optic gyro pdf download lefevre fiber optic gyro pdf. Lefevre, the fiberoptic gyroscope artech house, 2014. When futuristic technologies merge, big things can happen for smaller yachts. 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. However its principle of operation is instead based on the interference of light which has passed through a coil of optical fibre, which can be as long as 5 km.
Fiberoptic gyroscope technology and ringlaser gyroscope technology. For calculating the sagnac phase shift, an optical path laying on a. A fibre optic gyroscope fog senses changes in orientation using the sagnac effect, thus performing the function of a mechanical gyroscope. Lefevre fiber optic gyro pdf lefevre fiber optic gyro pdf. Idealphotonics inc pm fiber coil, fiber optic gyroscope. All components are constructed directly on a single continuous optical fiber, removing localized sources of reflection. This system has increased simplicity and stability over previous bulkoptic designs and has the potential for very high rotation sensitivity. Combining both, we estimate the reflectivity of the. Herve lefevre, the fiberoptic gyroscope, 1993, artech house. This effect shows that the propagation time of light.
In order to improve the dynamic performance of high precision interferometer fiber optic gyroscope ifog, the influencing factors of the fast response characteristics are analyzed based on a proposed assistant design setup, and a high dynamic detection method is proposed to suppress the adverse effects of the key influencing factors. Among the technologies available for gyroscopes usable in space, the fibre optic gyroscope fog technology appears to be the most suitable. Written by one of the fields leading experts, this landmark reference presents a thorough system analysis of the fiberoptic gyroscope fog, describing the concepts that have emerged as the preferred solutions for. An interferometric fiber optic gyroscope is formed by three essential components.
They feature solidstate, lowdrift, high shock usability, small size and short startup time and are available as basic single axis fog sensor, 1, 2 and 3axis solutions with analogue or digital outputs. Theoretical design of a depolarized interferometric fiber. Now the development of lowloss optical fibers and compact and reliable semiconductor light sources for the telecommunication industry has made possible a new approach. The assistant design platform is built by using the virtual. Fiberoptic gyroscope by herve lefevre, 9780890065372, available at book depository with free delivery worldwide. All this complemented by the extensive fog fiber optic gyroscope knowledge of our engineers gained through working with fog manufacturers. Light from an external source is split and injected into the fiber ends, travels in clockwise and counterclockwise directions and is recombined to form. Yjunction and pair of pushpull lowvoltage phase modulators. He earned his doctorate in opticsphotonics from the university of parisorsay in 1979. Fiber optic gyro 8088 000112 the fiber optic gyro fog is a compact, solid state, single axis rate sensor. The fiber optic gyroscope a sagnac interferometer for. It also describes the technological progress of guidedwave components.
The fiberoptic gyroscope, second edition, lefevre, herve. The first integrated optical driver chip for fiber optic. Proper choice of modulation frequency is shown to reduce instabilities further. Custom packaging, mounting kits, connectors, and io protocols. Modelling and simulation of the fiber optic gyroscope fog. Since then, the level of performance of the fog has been increased by about 3 orders of magnitude, reaching now a bias. The presence of the twist component whose period is just equal to. A fibreoptic gyroscope fog senses changes in orientation using the sagnac effect, thus. With the development of low loss single mode optical fiber waveguides, it is possible to construct a gyroscope using optical fibers. Lefevre is chief scientific officer of ixblue in france. The fiber optic gyroscope second edition download ebook. The triton series imu is an inertial measurement unit based on fiber optic gyroscope fog and quartz flexure accelerometer technology. Study on the drift of modulated phase in interference fiber optic. The implementation of the fiber optic gyroscope is mainly based on the segnik theory.
41 707 834 337 1605 465 411 635 652 428 879 584 687 1564 175 218 1589 87 1211 1563 1150 582 48 376 31 1602 1554 1171 851 388 12 1121 360 1413 1415 38 1291 1367 604 1407 192 1423 1095 1372 922 1136 1254 57 977 1274 656