Theoretical design of a depolarized interferometric fiberoptic gyroscope ifog on smf28 singlemode standard optical fiber based on closedloop sinusoidal phase modulation with serrodyne feedback phase modulation using simulation tools for tactical and industrial grade applications. Inertial sensors for rotation are used widely in commercial and military systems. With the application of this highfinesse and highper wrr to the resonant microoptic gyroscope rmog, a bias stability of 0. S 55 avenue auguste renoir, marlyleroi, france yves. The exploration of the controlled moment gyroscope with different axis is shown fig. The fog is a robust, reliable, maintenancefree electro optical device of. Data from the fiber optic gyroscope was collected and logged at 10 hz via digital computer while volunteer participants performed a number of standard driving maneuvers and invehicle tasks.
Fiber optic gyroscope pdf theory gyroscope optical fiber. In this thesis, i have considered two type of gyroscope design viz. Now the development of lowloss optical fibers and compact and reliable semiconductor light sources for the telecommunication industry has made possible a new approach. Fiberoptic gyroscope technology and ringlaser gyroscope technology. Mbs transmission 1985 1st industrial applications and military systems advent of single mode systems. Fiber optic gyroscope fog applications emcores fiber optic gyroscope fog technology is designed for fast, accurate navigation and gyrocompassing, and lownoise lineofsight stabilization. Global fiber optic gyroscope market the global fiber optic gyroscope market is segmented based on sensing axis into three notable segments. It comprises fiber optic minimum configuration sensing assembly and analog processing electronics.
The performance of ifogs is strongly dependent on fiber coils, which are the main sensing element in ifogs 5. Fc fiber optic gyro fog coils and other fiber optic. The cryostat has such a shape, that the gyroscope can be inserted along the middleaxis up to the center of the rotating pot see figure 2. Based on their sizes, gyroscope sensors are divided as small and largesized. Highest bias stability fiberoptic gyroscope srs5000. The fiberoptic gyroscope, second edition, lefevre, herve. Zhengyi zhang 0 0 department two, rocket force university of engineering, xian, 710025, china in view of the problems such as the lower automation level and the insufficient precision of the traditional fiber optic gyroscope fog static north. For years research and development in the fiber optic gyro area have been concentrated on the standard solution known as minimum configuration with nonreciprocal phase modulation 1. Laser gyroscope optical fiber polarization waves free. The principle of operation of fiber optic gyroscope is based on sagnac effect. A new scheme of threefrequency differential detection with a sideband locking technique is firstly proposed to suppress backscattering noise for improving the accuracy of resonator fiber optic gyroscope rfog. Approach exhibits in principle the capability of education for sustainable development pdf high performances mainly.
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. Many researchers have made important enabling contributions, and many more engineers have worked diligently for many years on solving the problems associated with realizing viable inertial navigation and guidance produce at affordable costs. This paper is a short analysis of key technological advantages of fiberoptic gyroscope fog technology for high performance applications over competing. Fiber optic gyroscope market global industry trends and. The fiber optic gyroscope second edition download ebook pdf. Written by one of the fields leading experts, this landmark reference presents a thorough system analysis of the fiber optic gyroscope fog, describing the concepts that have emerged as the preferred solutions for obtaining a practical device. Compensation accounts for varying intensities of the beams due to all or some changes of.
The interferometer includes a beam splitter and a single length of fiber formed into a loop. The basic phenomenon underlying optical rotation sensing is known as the sagnac effect. We used a militarygrade optolink srs fiberopticgyroscope, which is mounted on a support structure outside the cryostat allowing it to change its position and orientation all around the cryostat. They offer a very attractive solution based on fiber optic gyro technology that gives a number of benefits. The fiber optic gyroscope market is dominated by 1 axis with 55. Laser gyroscope free download as powerpoint presentation.
In this system, a feedback loop, which sent the output pulse through the input again, is used. Saabs fiber optic gyros, fog, are designed to provide maximum stabilisation in tough environments. Fiber optic gyroscope dynamic northfinder algorithm modeling. Angle error from vibrating in triaxial interferometric. The sensor has all solidstate optical devices for the precise measurements of mechanical rotation. The total output is the summation of each interference and it is in pulse state. Protonexchanged linbo 3 integrated optic circuit very high polarizer rejection manufactured by ixblue. The performance of ifogs is strongly dependent on fiber coils, which are the main sensing element in ifogs.
The fiberoptic gyroscope, artech house 1993 gustavson, t. Applications areas for various gyroscope technologies, laser ring gyroscopes, fiber optic gyroscope and mems gyroscopes. Angle error from vibrating in triaxial interferometric fiber. 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. Fiber gyro to increase effective area, we can wind n loops of fiber optic cable. Interferometric fiber optic gyroscope ifog is a wellknown optical sensor for angular measurement, and has been widely used in various inertial navigation systems ins. 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. The rotation sensing part of a fog consists of a very simple interferometer. As your optical fiber solutions partner, we develop the right fibers, cables, and other specialty optical fiber products to.
The beams, after splitting, are frequency modulated with a voltage having a serrodyne waveform, the polarity of the voltage applied to the modulator for the one beam being opposite to the polarity of the. The general photonics fc series of frameless fiber coils are available with lengths of 50 meters to 5 kilometers and diameters of 15 millimeters to 120 millimeters. The fiber optic gyroscope fog is based on the sagnac effect. As sensors three saab manufactured single axis fiber optic gyros with builtin temperature sensors are used. Since then, the level of performance of the fog has been increased by about 3 orders of magnitude, reaching now a bias. The interferometric fiber optic gyroscope ifog is an inertial sensor for detecting rotational velocity with high sensitivity as well as stability, and hence, has been widely utilized in many. 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 fiber optic gyroscope fog technology for high performance applications over competing technologies. In the system we proposed, one light path is divided into three paths and sinusoidal wave modulations of different frequencies are respectively applied to generate the sideband. From large to small the hierarchy of gyroscope sensors can be listed as ring laser gyroscope, fiberoptic gyroscope, fluid gyroscope, and vibration gyroscope. Us5420684a resonant interferometer fiber optic gyroscope. The fiber optic gyroscope fog is a solid state rotation sensor with no moving parts. This site is like a library, use search box in the widget to get ebook that you want. Pdf fiber optical gyroscope for space applications researchgate.
There are various studies in order to increase the sensitivity of fiber optic gyroscopes, which is an excellent vehicle for sensing rotation. The output intensity is modulated by the phase shift between the two beams. Temperature dependence of faraday effectinduced bias. An overview of optical gyroscopes theory, practical aspects. Click download or read online button to get the fiber optic gyroscope second edition book now. Fundamentals and applications september, 2015 david krohn, ph. This effect shows that the propagation time of light. For calculating the sagnac phase shift, an optical path laying on a. 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. A fibre optic gyroscope fog senses changes in orientation using the sagnac effect, thus performing the function of a mechanical gyroscope. Polarimetry fiber optic gyroscope article pdf available in optics express 2714.
The common advantages of ifogs with closedloop compensation are linearized output characteristics and insensitivity to the light source power, including its time and thermalinduced. Sheem published in 1980 the use of a 3x3 coupler 2, which allows to work at the quadrature point passively. An interferometric fiber optic gyroscope having compensation electronics to virtually eliminate rotation rate sensing errors caused by kerr effect in the ifog due to differing intensities of the counterpropagating beams relative to each other. Scope 1 this guide describes fiber optic gyroscope main features. Fiber optic gyroscope technology and ringlaser gyroscope technology. Actual configuration of a fiber gyro polarizationpreserving fiber coil with typically 100 m to 10 km manufactured by ixblue. The frameless coils are constructed with proprietary potting adhesives to ensure reliability. Highest bias stability fiberoptic gyroscope srs5000 today the fiberoptic gyroscopes fogs reach ultimate theoretical performance and surpass wellestablished competitor, the ring laser gyroscopes. Fiber optic gyroscope dynamic northfinder algorithm. Fiber optic gyroscope development at honeywell request pdf.
In the highperformance market, the ring laser gyroscope. Efficient modulation and processing method for closedloop. The implementation of the fiber optic gyroscope is mainly based on the segnik theory. Pdf polarimetry fiber optic gyroscope researchgate. Like the ring laser gyroscope, it makes use of the sagnac effect. Use features like bookmarks, note taking and highlighting while reading the fiberoptic gyroscope, second edition. That is the reason it is sometimes called an active ring resonator. Fiber optic gyroscope dynamic northfinder algorithm modeling and analysis based on simulink zhengyi zhang 0 chuntong liu 0 corresponding author. The fiberoptic gyroscope, second edition, lefevre, herve c. It senses the orientation,performing the function of a mechanical gyroscope. Fiberopticgyroscope measurements close to rotating.
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 obtaining a practical device. Fizoptika fiber optic gyroscope fog is a precision yet most miniature fiber optic rotation sensor. The fiber optic gyroscope second edition download ebook. An overview of optical gyroscopes theory, practical. Protonexchanged linbo 3 integratedoptic circuit very high polarizer rejection manufactured by ixblue. Fiber gyroscope or fiberoptic gyro fog which took to advantage the newly developed. Our longstanding leadership in the development of highlyaccurate defense and military grade fiber optic components and systems has paved the way for.
Fiber optic gyroscope pdf theory describe the basic principles underlying the fiber optic gyroscope and. The gyro units is specifically designed for stabilization applications where there is a need for digital output. Fc fiber optic gyro fog coils and other fiber optic sensors. Realizing the potential of the fiber optic gyro, like the ring laser gyro, has been a long and expensive process.
The fog is a robust, reliable, maintenancefree electro optical device offering all. Interference fiber optic gyroscope ifog is a novel optical rotation sensor based on sagnac effect. A fibreoptic gyroscope fog senses changes in orientation using the sagnac effect, thus. In general, the stress variation of the fiber coil induced from shock and vibration may lead. Osa singlepolarization fiberpigtailed highfinesse silica. In the sagnac effect two identical light beams traveling in opposite directions around a closed loop path. Ofs is an industry leader in optical fiber design or modification for highly customized applications. Pdf the presented method, based on the theory and equations of fiber optic gyroscope, gives a possibility to select appropriate interferometric fiber. Zhengyi zhang 0 0 department two, rocket force university of engineering, xian, 710025, china in view of the problems such as the lower automation level and the insufficient precision of the traditional fiber optic gyroscope fog static.
Yjunction and pair of pushpull lowvoltage phase modulators. Inertial rotation is measured in ifog as the phase difference between two lightwaves traveling in opposite direction around fiberoptic sensing loop. The two halves of the split beam travel in opposite directions in a coil of fiber optic cable as long as 5 km. This paper describes the development of fiber optic gyroscope fog for space applications at leos. A fiber optic gyroscope also uses the interference of light to detect mechanical rotation. A passive resonator gyroscope in which a laser beam is split into two equal intensity beams in a waveguide, each of the beams being coupled to counterpropagate around a fiber optic ring.
The results illustrate the versatility of the technology, showing its potential. The fiber optic gyroscope a sagnac interferometer for. This paper presents a simple method for compensating the sagnac phase shift in an interferometric fiber optic gyroscope ifog with a piezoelectric modulator. Modulated phase is used to compensate the phase of sagnac effect in digital closed. An overview of optical gyroscopes theory, practical aspects, applications and future trends by adi shamir 1 may 16, 2006. For the moment, they make use of mechanical gyroscopes or gas laser gyroscopes. The light from the external source s is split by the beamsp1itter bs and travels in the clockwise and counterc1ockwise direction. This paper presents a simple method for compensating the sagnac phase shift in an interferometric fiberoptic gyroscope ifog with. In the tactical applications market, the microelectromechanical systems mems gyroscope 1,2,3 and resonant micro optical gyroscope rmog 4,5,6 have attracted much attention due to compactness, light weight, and lowcost. Introducti on optical fiber gyroscope the basis for the optical fiber gyroscope is the sagnac effect sagnac, 19. Scribd is the worlds largest social reading and publishing site. Us6046810a kerr effect compensator for a fiber optic. Pdf the threeaxis closedloop fiber optic gyroscopes are described. A fiber optic gyroscope in accordance with claim 1 wherein said optical guide means includes a light waveguide having first and second input ports and first and second output ports, said waveguide operating to divide a light beam coupled to one of its input ports into two equal intensity light beams, each provided at one of said output ports.
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