US20100092126A1 - Bifilar optical fiber stowage for fiber-optic gyroscope - Google Patents

Bifilar optical fiber stowage for fiber-optic gyroscope Download PDF

Info

Publication number
US20100092126A1
US20100092126A1 US12/251,060 US25106008A US2010092126A1 US 20100092126 A1 US20100092126 A1 US 20100092126A1 US 25106008 A US25106008 A US 25106008A US 2010092126 A1 US2010092126 A1 US 2010092126A1
Authority
US
United States
Prior art keywords
fibers
fiber
portions
multiple turns
gyroscope
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US12/251,060
Other versions
US7684659B1 (en
Inventor
Andrew W. Kaliszek
Derek Mead
Brian P. Timmons
Stanislaw Kopacz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell International Inc
Original Assignee
Honeywell International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honeywell International Inc filed Critical Honeywell International Inc
Priority to US12/251,060 priority Critical patent/US7684659B1/en
Assigned to HONEYWELL INTERNATIONAL INC. reassignment HONEYWELL INTERNATIONAL INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KALISZEK, ANDREW W., KOPACZ, STANISLAW, MEAD, DEREK, TIMMONS, BRIAN P.
Priority to EP09172560.6A priority patent/EP2177876B1/en
Priority to JP2009236312A priority patent/JP5424805B2/en
Application granted granted Critical
Publication of US7684659B1 publication Critical patent/US7684659B1/en
Publication of US20100092126A1 publication Critical patent/US20100092126A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses
    • G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
    • G01C19/721—Details
    • G01C19/722—Details of the mechanical construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4457—Bobbins; Reels

Definitions

  • Fiber optic gyroscopes have become widely used technologies in many systems to sense the rotation and angular orientation of various objects, such as aerospace vehicles.
  • FOGs work by directing light in opposite directions around a closed optical path enclosing an area whose normal is along an axis of rotation. If the device is rotated about the axis of rotation, the optical path length for the light traveling in one direction will be reduced, while the optical path length for the light traveling in the opposite direction will be increased. The change in path length causes a phase shift between the two light waves that is proportional to the rate of rotation.
  • a typical FOG 10 includes a light source 15 , a rate detector 20 , a coupler 25 , an integrated optics chip (IOC) 30 , and an interferometer, such as a sensing coil 35 .
  • IOC integrated optics chip
  • a red fiber service lead 40 and blue fiber service lead 45 of the IOC 30 is spliced 50 , 55 to the red fiber service lead 60 and blue fiber service lead 65 of the fiber coil interferometer 35 .
  • Each of these service leads are often approximately two meters in length to allow optical splicing needed in the build process. Since these fiber service leads for splicing are functionally part of the interferometer 35 , the manner in which the service leads are stowed is a key gyroscope performance parameter.
  • these lead fibers are stowed in a thread-like winding pattern in a holding compartment having independent thermal characteristics from the interferometer 35 .
  • waves counter-propagating through the coil 35 may “see” different environment effects at different points in time.
  • High-performance polarization maintaining gyroscopes must have Lorentz reciprocity between the counter-propagating waves. Lorentz reciprocity requires light propagating in a medium to have identical effects independent of the direction of light propagation. Environmental effects can easily degrade Lorentz reciprocity and gyroscope performance. As such, these conventional approaches typically have degraded Lorentz reciprocity caused by environmental effects.
  • a method of constructing a fiber-optic gyroscope includes optically coupling first and second optical fibers to an optical path of an interferometer having an outer surface, coupling at least a portion of the first and second fibers to the outer surface, and optically coupling the first and second fibers to an optical path of an integrated optics chip (IOC).
  • IOC integrated optics chip
  • FIG. 1 is a schematic view of a conventional FOG in which embodiments of the present invention may be implement;
  • FIG. 2 is a front plan view of service lead routing according to an embodiment of the invention.
  • FIG. 3 is a rear plan view of service lead routing according to an embodiment of the invention.
  • FIG. 4 is a top perspective cross-sectional view of an interferometer with service lead routing according to an embodiment of the invention.
  • An embodiment provides for a service-lead stowage location on the outer layer of an interferometric fiber coil, thereby providing improved performance as compared to a separate compartment storage.
  • An embodiment of a bifilar service-lead routing method provides improved performance under time-varying thermal gradients and reduces the Shupe effect of these service leads.
  • An embodiment provides bifilar fiber routing method that ensures service leads are confined to a single outer layer of a coil and not additional layers, which would be subject to more stress over temperature changes.
  • An embodiment provides a reduction of the number of points where optical fiber crosses over itself, as well as twists in the fiber, thereby improving gyroscope bias stability.
  • FIG. 2 illustrated is a front view of the outer surface of an interferometer 200 along which are routed, according to an embodiment, a red service lead fiber 210 (illustrated in FIG. 2 as a solid fiber element) and a blue service lead fiber 220 (illustrated in FIG. 2 as a cross-hatched fiber element) connecting an optical path of the interferometer 200 to the optical path of an IOC (not shown).
  • a red service lead fiber 210 illustrated in FIG. 2 as a solid fiber element
  • a blue service lead fiber 220 illustrated in FIG. 2 as a cross-hatched fiber element
  • a first portion of the red fiber 210 directly coupled to the optical path of the interferometer 200 is seen emerging from the center of the interferometer and is oriented along a left-to-right path along the outer surface.
  • a first portion of the blue fiber 220 directly coupled to the optical path of the interferometer 200 is seen emerging from the center of the interferometer and is oriented along a right-to-left path along the outer surface.
  • a second portion of the red fiber 210 and a second portion of the blue fiber 220 converge toward one another so as to form a “Y”-junction 230 .
  • a winding 250 is formed so as to form only a single layer along the outer surface of the interferometer 200 in a direction normal to a center axis 400 of the interferometer. Additionally, it should be noted that, in forming the winding 250 , the red and blue fibers 210 , 220 do not cross or otherwise overlap each other.
  • a fourth portion of the red fiber 210 and a fourth portion of the blue fiber 220 are routed up and away from the winding and in the opposite direction so as to form a “U-turn” configuration 260 , or perhaps an even more rounded, “lasso” type configuration (not shown).
  • the distance between the red and blue fibers may be increased at the “U” portion of the configuration 260 to accommodate the longer fiber.
  • the red and blue fibers 210 , 220 are oriented in a substantially sinusoidal, or serpentine, configuration 300 along the outer surface, also in the direction opposite of the direction in which the winding 250 was formed.
  • the red and blue fibers 210 , 220 may then be subsequently coupled to the optical path of the IOC.
  • the red and blue fibers 210 , 220 are coupled to the outer surface of the interferometer 200 in a manner that reduces or eliminates light cross-coupling.
  • red and blue fibers 210 , 220 cross each other or otherwise overlap is at the points of transition from the winding 250 to the “U-turn” configuration 260 as illustrated in the example of FIG. 2 .

Abstract

A method of constructing a fiber-optic gyroscope includes optically coupling first and second optical fibers to an optical path of an interferometer having an outer surface, coupling at least a portion of the first and second fibers to the outer surface, and optically coupling the first and second fibers to an optical path of an integrated optics chip (IOC).

Description

    BACKGROUND OF THE INVENTION
  • Fiber optic gyroscopes (FOGs) have become widely used technologies in many systems to sense the rotation and angular orientation of various objects, such as aerospace vehicles. FOGs work by directing light in opposite directions around a closed optical path enclosing an area whose normal is along an axis of rotation. If the device is rotated about the axis of rotation, the optical path length for the light traveling in one direction will be reduced, while the optical path length for the light traveling in the opposite direction will be increased. The change in path length causes a phase shift between the two light waves that is proportional to the rate of rotation.
  • Referring to FIG. 1, a typical FOG 10 includes a light source 15, a rate detector 20, a coupler 25, an integrated optics chip (IOC) 30, and an interferometer, such as a sensing coil 35. As shown in FIG. 1, a red fiber service lead 40 and blue fiber service lead 45 of the IOC 30 is spliced 50, 55 to the red fiber service lead 60 and blue fiber service lead 65 of the fiber coil interferometer 35. Each of these service leads are often approximately two meters in length to allow optical splicing needed in the build process. Since these fiber service leads for splicing are functionally part of the interferometer 35, the manner in which the service leads are stowed is a key gyroscope performance parameter.
  • In conventional FOG builds, these lead fibers are stowed in a thread-like winding pattern in a holding compartment having independent thermal characteristics from the interferometer 35. Specifically, in such an approach, waves counter-propagating through the coil 35 may “see” different environment effects at different points in time. High-performance polarization maintaining gyroscopes must have Lorentz reciprocity between the counter-propagating waves. Lorentz reciprocity requires light propagating in a medium to have identical effects independent of the direction of light propagation. Environmental effects can easily degrade Lorentz reciprocity and gyroscope performance. As such, these conventional approaches typically have degraded Lorentz reciprocity caused by environmental effects.
    • SUMMARY OF THE INVENTION
  • In an embodiment, a method of constructing a fiber-optic gyroscope includes optically coupling first and second optical fibers to an optical path of an interferometer having an outer surface, coupling at least a portion of the first and second fibers to the outer surface, and optically coupling the first and second fibers to an optical path of an integrated optics chip (IOC).
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Preferred and alternative embodiments of the present invention are described in detail below with reference to the following drawings.
  • FIG. 1 is a schematic view of a conventional FOG in which embodiments of the present invention may be implement;
  • FIG. 2 is a front plan view of service lead routing according to an embodiment of the invention;
  • FIG. 3 is a rear plan view of service lead routing according to an embodiment of the invention; and
  • FIG. 4 is a top perspective cross-sectional view of an interferometer with service lead routing according to an embodiment of the invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • An embodiment provides for a service-lead stowage location on the outer layer of an interferometric fiber coil, thereby providing improved performance as compared to a separate compartment storage.
  • An embodiment of a bifilar service-lead routing method provides improved performance under time-varying thermal gradients and reduces the Shupe effect of these service leads.
  • An embodiment provides bifilar fiber routing method that ensures service leads are confined to a single outer layer of a coil and not additional layers, which would be subject to more stress over temperature changes.
  • An embodiment provides a reduction of the number of points where optical fiber crosses over itself, as well as twists in the fiber, thereby improving gyroscope bias stability.
  • By routing the fibers in such a bifilar-pair fashion, points equal and opposite in the sensing loop are physically adjacent to each other and see the same effects over varying environments.
  • Referring now to FIG. 2, illustrated is a front view of the outer surface of an interferometer 200 along which are routed, according to an embodiment, a red service lead fiber 210 (illustrated in FIG. 2 as a solid fiber element) and a blue service lead fiber 220 (illustrated in FIG. 2 as a cross-hatched fiber element) connecting an optical path of the interferometer 200 to the optical path of an IOC (not shown).
  • In an embodiment of the invention, a first portion of the red fiber 210 directly coupled to the optical path of the interferometer 200 is seen emerging from the center of the interferometer and is oriented along a left-to-right path along the outer surface. Similarly, a first portion of the blue fiber 220 directly coupled to the optical path of the interferometer 200 is seen emerging from the center of the interferometer and is oriented along a right-to-left path along the outer surface. As such, a second portion of the red fiber 210 and a second portion of the blue fiber 220 converge toward one another so as to form a “Y”-junction 230.
  • Subsequently, beginning at a region 240 of the outer surface, multiple turns of respective third portions of the red fiber 210 and blue fiber 220 are wrapped around the outer surface a predetermined integer number of times to form a winding 250. As best seen in FIG. 4, the winding is formed so as to form only a single layer along the outer surface of the interferometer 200 in a direction normal to a center axis 400 of the interferometer. Additionally, it should be noted that, in forming the winding 250, the red and blue fibers 210, 220 do not cross or otherwise overlap each other.
  • After forming the winding 250, a fourth portion of the red fiber 210 and a fourth portion of the blue fiber 220 are routed up and away from the winding and in the opposite direction so as to form a “U-turn” configuration 260, or perhaps an even more rounded, “lasso” type configuration (not shown). In an embodiment, if there is a disparity in length between the red and blue fibers 210, 220, the distance between the red and blue fibers may be increased at the “U” portion of the configuration 260 to accommodate the longer fiber.
  • After forming the U-turn configuration 260, as best illustrated in FIG. 3, the red and blue fibers 210, 220 are oriented in a substantially sinusoidal, or serpentine, configuration 300 along the outer surface, also in the direction opposite of the direction in which the winding 250 was formed. The red and blue fibers 210, 220 may then be subsequently coupled to the optical path of the IOC.
  • In an embodiment, the red and blue fibers 210, 220 are coupled to the outer surface of the interferometer 200 in a manner that reduces or eliminates light cross-coupling.
  • It should be further noted that the only time the red and blue fibers 210, 220 cross each other or otherwise overlap is at the points of transition from the winding 250 to the “U-turn” configuration 260 as illustrated in the example of FIG. 2.
  • While a preferred embodiment of the invention has been illustrated and described, as noted above, many changes can be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is not limited by the disclosure of the preferred embodiment. Instead, the invention should be determined entirely by reference to the claims that follow.

Claims (18)

1. A method of constructing a fiber-optic gyroscope, the method comprising:
optically coupling first and second optical fibers to an optical path of an interferometer having an outer surface;
coupling at least a portion of the first and second fibers to the outer surface; and
optically coupling the first and second fibers to an optical path of an integrated optics chip (IOC);
wherein coupling at least a portion of the first and second fibers to the outer surface comprises:
orienting a first portion of the first fiber in a first direction relative to the outer surface;
orienting a first portion of the second fiber in a second direction relative to the outer surface and different from the first direction;
orienting a second portion of the first fiber and a second portion of the second fiber such that the second portions of the first and second fibers converge toward one another;
wrapping multiple turns of respective third portions of the first and second fibers around the outer surface in the same direction;
looping a fourth portion of the first fiber and a fourth portion of the second fiber to be oriented in a direction opposite to the direction of the respective third portions; and
orienting a respective fifth portion of the first and second fibers in a substantially sinusoidal configuration along the outer surface.
2. (canceled)
3. The method of claim 1 wherein the first direction is the opposite of the second direction.
4. The method of claim 1 wherein orienting a second portion of the first fiber and a second portion of the second fiber such that the second portions of the first and second fibers converge toward one another comprises orienting the second portion of the first fiber and the second portion of the second fiber such that the second fiber portions do not overlap one another.
5. The method of claim 1 wherein wrapping multiple turns of the respective third portions of the first and second fibers around the outer surface comprises wrapping multiple turns of the respective third portions of the first and second fibers around the outer surface without overlapping the first and second portions of the first and second fibers.
6.-9. (canceled)
10. A fiber-optic gyroscope, comprising:
an interferometer having an optical path and an outer surface;
an integrated optics chip (IOC) having an optical path; and
first and second optical fibers, at least a portion of the first and second fibers being coupled the to the outer surface, the first and second fibers being optically coupled to the optical paths of the interferometer and IOC;
wherein the first and second fibers are coupled to the outer surface such that:
a first portion of the first fiber is oriented in a first direction relative to the outer surface;
a first portion of the second fiber is oriented in a second direction relative to the outer surface and different from the first direction;
a second portion of the first fiber and a second portion of the second fiber are oriented such that the second portions of the first and second fibers converge toward one another;
multiple turns of respective third portions of the first and second fibers are wrapped around the outer surface in the same direction;
a fourth portion of the first fiber and a fourth portion of the second fiber are looped to be oriented in a direction opposite to the direction of the respective third portions; and
a fifth portion of the first fiber and a fifth portion of the second fibers are oriented in a substantially sinusoidal configuration along the outer surface.
11. (canceled)
12. The gyroscope of claim 10 wherein the first direction is the opposite of the second direction.
13. The gyroscope of claim 10 wherein the second portions of the first and second fibers do not overlap one another.
14. The gyroscope of claim 10 wherein the multiple turns of the respective third portions of the first and second fibers are wrapped around the outer surface without overlapping the first and second portions of the first and second fibers.
15.-18. (canceled)
19. The method of claim 1, wherein coupling at least a portion of the first and second fibers to the outer surface comprises coupling at least a portion of the first and second fibers to the outer surface in a single layer.
20. The method of claim 1, wherein looping the respective fourth portion of the first and second fibers comprises looping the respective fourth portions over the top of the multiple turns of the third portions.
21. The method of claim 20, wherein the respective fourth portions are looped over the top of the multiple turns of the third portions such that there is a single cross-over point for each of the multiple turns.
22. The gyroscope of claim 10, wherein the first and second fibers are coupled to the outer surface in a single layer.
23. The gyroscope of claim 10, wherein the respective fourth portions of the first and second fibers are looped over the top of the multiple turns of the third portions.
24. The gyroscope of claim 23, wherein the respective fourth portions are looped over the top of the multiple turns of the third portions such that there is a single cross-over point for each of the multiple turns.
US12/251,060 2008-10-14 2008-10-14 Bifilar optical fiber stowage for fiber-optic gyroscope Active US7684659B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/251,060 US7684659B1 (en) 2008-10-14 2008-10-14 Bifilar optical fiber stowage for fiber-optic gyroscope
EP09172560.6A EP2177876B1 (en) 2008-10-14 2009-10-08 Bifilar optical fibers arrangement method for a fiber-optic gyroscope
JP2009236312A JP5424805B2 (en) 2008-10-14 2009-10-13 Two-wind fiber optic housing for fiber optic gyroscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/251,060 US7684659B1 (en) 2008-10-14 2008-10-14 Bifilar optical fiber stowage for fiber-optic gyroscope

Publications (2)

Publication Number Publication Date
US7684659B1 US7684659B1 (en) 2010-03-23
US20100092126A1 true US20100092126A1 (en) 2010-04-15

Family

ID=41566421

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/251,060 Active US7684659B1 (en) 2008-10-14 2008-10-14 Bifilar optical fiber stowage for fiber-optic gyroscope

Country Status (3)

Country Link
US (1) US7684659B1 (en)
EP (1) EP2177876B1 (en)
JP (1) JP5424805B2 (en)

Cited By (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8868574B2 (en) 2012-07-30 2014-10-21 Box, Inc. System and method for advanced search and filtering mechanisms for enterprise administrators in a cloud-based environment
US8892679B1 (en) 2013-09-13 2014-11-18 Box, Inc. Mobile device, methods and user interfaces thereof in a mobile device platform featuring multifunctional access and engagement in a collaborative environment provided by a cloud-based platform
US8914900B2 (en) 2012-05-23 2014-12-16 Box, Inc. Methods, architectures and security mechanisms for a third-party application to access content in a cloud-based platform
US8990151B2 (en) 2011-10-14 2015-03-24 Box, Inc. Automatic and semi-automatic tagging features of work items in a shared workspace for metadata tracking in a cloud-based content management system with selective or optional user contribution
US8990307B2 (en) 2011-11-16 2015-03-24 Box, Inc. Resource effective incremental updating of a remote client with events which occurred via a cloud-enabled platform
US9015601B2 (en) 2011-06-21 2015-04-21 Box, Inc. Batch uploading of content to a web-based collaboration environment
US9019123B2 (en) 2011-12-22 2015-04-28 Box, Inc. Health check services for web-based collaboration environments
US9021099B2 (en) 2012-07-03 2015-04-28 Box, Inc. Load balancing secure FTP connections among multiple FTP servers
US9027108B2 (en) 2012-05-23 2015-05-05 Box, Inc. Systems and methods for secure file portability between mobile applications on a mobile device
US9054919B2 (en) 2012-04-05 2015-06-09 Box, Inc. Device pinning capability for enterprise cloud service and storage accounts
US9063912B2 (en) 2011-06-22 2015-06-23 Box, Inc. Multimedia content preview rendering in a cloud content management system
US9098474B2 (en) 2011-10-26 2015-08-04 Box, Inc. Preview pre-generation based on heuristics and algorithmic prediction/assessment of predicted user behavior for enhancement of user experience
US9117087B2 (en) 2012-09-06 2015-08-25 Box, Inc. System and method for creating a secure channel for inter-application communication based on intents
US9135462B2 (en) 2012-08-29 2015-09-15 Box, Inc. Upload and download streaming encryption to/from a cloud-based platform
US9197718B2 (en) 2011-09-23 2015-11-24 Box, Inc. Central management and control of user-contributed content in a web-based collaboration environment and management console thereof
US9195636B2 (en) 2012-03-07 2015-11-24 Box, Inc. Universal file type preview for mobile devices
US9195519B2 (en) 2012-09-06 2015-11-24 Box, Inc. Disabling the self-referential appearance of a mobile application in an intent via a background registration
US9213684B2 (en) 2013-09-13 2015-12-15 Box, Inc. System and method for rendering document in web browser or mobile device regardless of third-party plug-in software
US9237170B2 (en) 2012-07-19 2016-01-12 Box, Inc. Data loss prevention (DLP) methods and architectures by a cloud service
US9292833B2 (en) 2012-09-14 2016-03-22 Box, Inc. Batching notifications of activities that occur in a web-based collaboration environment
US9369520B2 (en) 2012-08-19 2016-06-14 Box, Inc. Enhancement of upload and/or download performance based on client and/or server feedback information
US9396245B2 (en) 2013-01-02 2016-07-19 Box, Inc. Race condition handling in a system which incrementally updates clients with events that occurred in a cloud-based collaboration platform
US9396216B2 (en) 2012-05-04 2016-07-19 Box, Inc. Repository redundancy implementation of a system which incrementally updates clients with events that occurred via a cloud-enabled platform
US9413587B2 (en) 2012-05-02 2016-08-09 Box, Inc. System and method for a third-party application to access content within a cloud-based platform
US9483473B2 (en) 2013-09-13 2016-11-01 Box, Inc. High availability architecture for a cloud-based concurrent-access collaboration platform
US9495364B2 (en) 2012-10-04 2016-11-15 Box, Inc. Enhanced quick search features, low-barrier commenting/interactive features in a collaboration platform
US9507795B2 (en) 2013-01-11 2016-11-29 Box, Inc. Functionalities, features, and user interface of a synchronization client to a cloud-based environment
US9519526B2 (en) 2007-12-05 2016-12-13 Box, Inc. File management system and collaboration service and integration capabilities with third party applications
US9519886B2 (en) 2013-09-13 2016-12-13 Box, Inc. Simultaneous editing/accessing of content by collaborator invitation through a web-based or mobile application to a cloud-based collaboration platform
US9535909B2 (en) 2013-09-13 2017-01-03 Box, Inc. Configurable event-based automation architecture for cloud-based collaboration platforms
US9535924B2 (en) 2013-07-30 2017-01-03 Box, Inc. Scalability improvement in a system which incrementally updates clients with events that occurred in a cloud-based collaboration platform
US9553758B2 (en) 2012-09-18 2017-01-24 Box, Inc. Sandboxing individual applications to specific user folders in a cloud-based service
US9558202B2 (en) 2012-08-27 2017-01-31 Box, Inc. Server side techniques for reducing database workload in implementing selective subfolder synchronization in a cloud-based environment
US9575981B2 (en) 2012-04-11 2017-02-21 Box, Inc. Cloud service enabled to handle a set of files depicted to a user as a single file in a native operating system
US9602514B2 (en) 2014-06-16 2017-03-21 Box, Inc. Enterprise mobility management and verification of a managed application by a content provider
US9628268B2 (en) 2012-10-17 2017-04-18 Box, Inc. Remote key management in a cloud-based environment
US9633037B2 (en) 2013-06-13 2017-04-25 Box, Inc Systems and methods for synchronization event building and/or collapsing by a synchronization component of a cloud-based platform
US9652741B2 (en) 2011-07-08 2017-05-16 Box, Inc. Desktop application for access and interaction with workspaces in a cloud-based content management system and synchronization mechanisms thereof
US9665349B2 (en) 2012-10-05 2017-05-30 Box, Inc. System and method for generating embeddable widgets which enable access to a cloud-based collaboration platform
US9691051B2 (en) 2012-05-21 2017-06-27 Box, Inc. Security enhancement through application access control
US9705967B2 (en) 2012-10-04 2017-07-11 Box, Inc. Corporate user discovery and identification of recommended collaborators in a cloud platform
US9712510B2 (en) 2012-07-06 2017-07-18 Box, Inc. Systems and methods for securely submitting comments among users via external messaging applications in a cloud-based platform
US9729675B2 (en) 2012-08-19 2017-08-08 Box, Inc. Enhancement of upload and/or download performance based on client and/or server feedback information
US9756022B2 (en) 2014-08-29 2017-09-05 Box, Inc. Enhanced remote key management for an enterprise in a cloud-based environment
US9773051B2 (en) 2011-11-29 2017-09-26 Box, Inc. Mobile platform file and folder selection functionalities for offline access and synchronization
US9794256B2 (en) 2012-07-30 2017-10-17 Box, Inc. System and method for advanced control tools for administrators in a cloud-based service
US9792320B2 (en) 2012-07-06 2017-10-17 Box, Inc. System and method for performing shard migration to support functions of a cloud-based service
US9805050B2 (en) 2013-06-21 2017-10-31 Box, Inc. Maintaining and updating file system shadows on a local device by a synchronization client of a cloud-based platform
US9894119B2 (en) 2014-08-29 2018-02-13 Box, Inc. Configurable metadata-based automation and content classification architecture for cloud-based collaboration platforms
US9904435B2 (en) 2012-01-06 2018-02-27 Box, Inc. System and method for actionable event generation for task delegation and management via a discussion forum in a web-based collaboration environment
US9953036B2 (en) 2013-01-09 2018-04-24 Box, Inc. File system monitoring in a system which incrementally updates clients with events that occurred in a cloud-based collaboration platform
US9959420B2 (en) 2012-10-02 2018-05-01 Box, Inc. System and method for enhanced security and management mechanisms for enterprise administrators in a cloud-based environment
US9965745B2 (en) 2012-02-24 2018-05-08 Box, Inc. System and method for promoting enterprise adoption of a web-based collaboration environment
US9978040B2 (en) 2011-07-08 2018-05-22 Box, Inc. Collaboration sessions in a workspace on a cloud-based content management system
US10038731B2 (en) 2014-08-29 2018-07-31 Box, Inc. Managing flow-based interactions with cloud-based shared content
US10110656B2 (en) 2013-06-25 2018-10-23 Box, Inc. Systems and methods for providing shell communication in a cloud-based platform
US10200256B2 (en) 2012-09-17 2019-02-05 Box, Inc. System and method of a manipulative handle in an interactive mobile user interface
US10229134B2 (en) 2013-06-25 2019-03-12 Box, Inc. Systems and methods for managing upgrades, migration of user data and improving performance of a cloud-based platform
US10235383B2 (en) 2012-12-19 2019-03-19 Box, Inc. Method and apparatus for synchronization of items with read-only permissions in a cloud-based environment
US10452667B2 (en) 2012-07-06 2019-10-22 Box Inc. Identification of people as search results from key-word based searches of content in a cloud-based environment
US10509527B2 (en) 2013-09-13 2019-12-17 Box, Inc. Systems and methods for configuring event-based automation in cloud-based collaboration platforms
US10530854B2 (en) 2014-05-30 2020-01-07 Box, Inc. Synchronization of permissioned content in cloud-based environments
US10554426B2 (en) 2011-01-20 2020-02-04 Box, Inc. Real time notification of activities that occur in a web-based collaboration environment
US10574442B2 (en) 2014-08-29 2020-02-25 Box, Inc. Enhanced remote key management for an enterprise in a cloud-based environment
US10599671B2 (en) 2013-01-17 2020-03-24 Box, Inc. Conflict resolution, retry condition management, and handling of problem files for the synchronization client to a cloud-based platform
US10725968B2 (en) 2013-05-10 2020-07-28 Box, Inc. Top down delete or unsynchronization on delete of and depiction of item synchronization with a synchronization client to a cloud-based platform
US10846074B2 (en) 2013-05-10 2020-11-24 Box, Inc. Identification and handling of items to be ignored for synchronization with a cloud-based platform by a synchronization client
US10866931B2 (en) 2013-10-22 2020-12-15 Box, Inc. Desktop application for accessing a cloud collaboration platform
US10915492B2 (en) 2012-09-19 2021-02-09 Box, Inc. Cloud-based platform enabled with media content indexed for text-based searches and/or metadata extraction
US11210610B2 (en) 2011-10-26 2021-12-28 Box, Inc. Enhanced multimedia content preview rendering in a cloud content management system
US11232481B2 (en) 2012-01-30 2022-01-25 Box, Inc. Extended applications of multimedia content previews in the cloud-based content management system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105241441B (en) * 2014-07-10 2018-02-27 北京自动化控制设备研究所 A kind of design method of suitable miniaturization closed-loop fiber optic gyroscope Fibre Optical Sensor ring
CN111239948B (en) * 2020-03-18 2022-02-18 中国船舶重工集团公司第七0七研究所 Pen type fiber arranging tool and optical fiber precise arrangement method based on pen type fiber arranging tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973783A (en) * 1998-07-31 1999-10-26 Litton Systems, Inc. Fiber optic gyroscope coil lead dressing and method for forming the same
US6529444B2 (en) * 1998-04-03 2003-03-04 The Board Of Trustees Of The Leland Stanford Junior University Folded sagnac sensor array
US6685128B2 (en) * 2001-05-15 2004-02-03 Northrop Grumman Corporation Systems and methods of winding optical fiber
US20070201030A1 (en) * 2006-02-27 2007-08-30 Honeywell International, Inc. Navigation grade gyroscope
US7372574B2 (en) * 2005-12-09 2008-05-13 Honeywell International Inc. System and method for stabilizing light sources in resonator gyro

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61169714A (en) * 1985-01-22 1986-07-31 Nippon Kogaku Kk <Nikon> Optical fiber gyro
JPS61226609A (en) * 1985-04-01 1986-10-08 Nippon Kogaku Kk <Nikon> Optical fiber gyro
US5333214A (en) * 1993-02-12 1994-07-26 Litton Systems, Inc. Apparatus for reducing magnetic field-induced bias errors in a fiber optic gyroscope
GB9305688D0 (en) * 1993-03-19 1993-05-19 British Aerospace A fibre optic gyroscope sensing coil
JPH08304082A (en) * 1995-05-09 1996-11-22 Hitachi Cable Ltd Optical rotational angle sensor
JPH0961176A (en) * 1995-08-25 1997-03-07 Japan Aviation Electron Ind Ltd Optical fiber coil for optical fiber gyro
JP3810916B2 (en) * 1998-01-22 2006-08-16 三菱電線工業株式会社 Optical fiber holding structure, manufacturing jig therefor, and manufacturing method therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529444B2 (en) * 1998-04-03 2003-03-04 The Board Of Trustees Of The Leland Stanford Junior University Folded sagnac sensor array
US5973783A (en) * 1998-07-31 1999-10-26 Litton Systems, Inc. Fiber optic gyroscope coil lead dressing and method for forming the same
US6685128B2 (en) * 2001-05-15 2004-02-03 Northrop Grumman Corporation Systems and methods of winding optical fiber
US7372574B2 (en) * 2005-12-09 2008-05-13 Honeywell International Inc. System and method for stabilizing light sources in resonator gyro
US20070201030A1 (en) * 2006-02-27 2007-08-30 Honeywell International, Inc. Navigation grade gyroscope

Cited By (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9519526B2 (en) 2007-12-05 2016-12-13 Box, Inc. File management system and collaboration service and integration capabilities with third party applications
US10554426B2 (en) 2011-01-20 2020-02-04 Box, Inc. Real time notification of activities that occur in a web-based collaboration environment
US9015601B2 (en) 2011-06-21 2015-04-21 Box, Inc. Batch uploading of content to a web-based collaboration environment
US9063912B2 (en) 2011-06-22 2015-06-23 Box, Inc. Multimedia content preview rendering in a cloud content management system
US9978040B2 (en) 2011-07-08 2018-05-22 Box, Inc. Collaboration sessions in a workspace on a cloud-based content management system
US9652741B2 (en) 2011-07-08 2017-05-16 Box, Inc. Desktop application for access and interaction with workspaces in a cloud-based content management system and synchronization mechanisms thereof
US9197718B2 (en) 2011-09-23 2015-11-24 Box, Inc. Central management and control of user-contributed content in a web-based collaboration environment and management console thereof
US8990151B2 (en) 2011-10-14 2015-03-24 Box, Inc. Automatic and semi-automatic tagging features of work items in a shared workspace for metadata tracking in a cloud-based content management system with selective or optional user contribution
US11210610B2 (en) 2011-10-26 2021-12-28 Box, Inc. Enhanced multimedia content preview rendering in a cloud content management system
US9098474B2 (en) 2011-10-26 2015-08-04 Box, Inc. Preview pre-generation based on heuristics and algorithmic prediction/assessment of predicted user behavior for enhancement of user experience
US9015248B2 (en) 2011-11-16 2015-04-21 Box, Inc. Managing updates at clients used by a user to access a cloud-based collaboration service
US8990307B2 (en) 2011-11-16 2015-03-24 Box, Inc. Resource effective incremental updating of a remote client with events which occurred via a cloud-enabled platform
US10909141B2 (en) 2011-11-29 2021-02-02 Box, Inc. Mobile platform file and folder selection functionalities for offline access and synchronization
US9773051B2 (en) 2011-11-29 2017-09-26 Box, Inc. Mobile platform file and folder selection functionalities for offline access and synchronization
US11537630B2 (en) 2011-11-29 2022-12-27 Box, Inc. Mobile platform file and folder selection functionalities for offline access and synchronization
US11853320B2 (en) 2011-11-29 2023-12-26 Box, Inc. Mobile platform file and folder selection functionalities for offline access and synchronization
US9019123B2 (en) 2011-12-22 2015-04-28 Box, Inc. Health check services for web-based collaboration environments
US9904435B2 (en) 2012-01-06 2018-02-27 Box, Inc. System and method for actionable event generation for task delegation and management via a discussion forum in a web-based collaboration environment
US11232481B2 (en) 2012-01-30 2022-01-25 Box, Inc. Extended applications of multimedia content previews in the cloud-based content management system
US10713624B2 (en) 2012-02-24 2020-07-14 Box, Inc. System and method for promoting enterprise adoption of a web-based collaboration environment
US9965745B2 (en) 2012-02-24 2018-05-08 Box, Inc. System and method for promoting enterprise adoption of a web-based collaboration environment
US9195636B2 (en) 2012-03-07 2015-11-24 Box, Inc. Universal file type preview for mobile devices
US9054919B2 (en) 2012-04-05 2015-06-09 Box, Inc. Device pinning capability for enterprise cloud service and storage accounts
US9575981B2 (en) 2012-04-11 2017-02-21 Box, Inc. Cloud service enabled to handle a set of files depicted to a user as a single file in a native operating system
US9413587B2 (en) 2012-05-02 2016-08-09 Box, Inc. System and method for a third-party application to access content within a cloud-based platform
US9396216B2 (en) 2012-05-04 2016-07-19 Box, Inc. Repository redundancy implementation of a system which incrementally updates clients with events that occurred via a cloud-enabled platform
US9691051B2 (en) 2012-05-21 2017-06-27 Box, Inc. Security enhancement through application access control
US9552444B2 (en) 2012-05-23 2017-01-24 Box, Inc. Identification verification mechanisms for a third-party application to access content in a cloud-based platform
US9280613B2 (en) 2012-05-23 2016-03-08 Box, Inc. Metadata enabled third-party application access of content at a cloud-based platform via a native client to the cloud-based platform
US9027108B2 (en) 2012-05-23 2015-05-05 Box, Inc. Systems and methods for secure file portability between mobile applications on a mobile device
US8914900B2 (en) 2012-05-23 2014-12-16 Box, Inc. Methods, architectures and security mechanisms for a third-party application to access content in a cloud-based platform
US9021099B2 (en) 2012-07-03 2015-04-28 Box, Inc. Load balancing secure FTP connections among multiple FTP servers
US10452667B2 (en) 2012-07-06 2019-10-22 Box Inc. Identification of people as search results from key-word based searches of content in a cloud-based environment
US9712510B2 (en) 2012-07-06 2017-07-18 Box, Inc. Systems and methods for securely submitting comments among users via external messaging applications in a cloud-based platform
US9792320B2 (en) 2012-07-06 2017-10-17 Box, Inc. System and method for performing shard migration to support functions of a cloud-based service
US9473532B2 (en) 2012-07-19 2016-10-18 Box, Inc. Data loss prevention (DLP) methods by a cloud service including third party integration architectures
US9237170B2 (en) 2012-07-19 2016-01-12 Box, Inc. Data loss prevention (DLP) methods and architectures by a cloud service
US9794256B2 (en) 2012-07-30 2017-10-17 Box, Inc. System and method for advanced control tools for administrators in a cloud-based service
US8868574B2 (en) 2012-07-30 2014-10-21 Box, Inc. System and method for advanced search and filtering mechanisms for enterprise administrators in a cloud-based environment
US9369520B2 (en) 2012-08-19 2016-06-14 Box, Inc. Enhancement of upload and/or download performance based on client and/or server feedback information
US9729675B2 (en) 2012-08-19 2017-08-08 Box, Inc. Enhancement of upload and/or download performance based on client and/or server feedback information
US9558202B2 (en) 2012-08-27 2017-01-31 Box, Inc. Server side techniques for reducing database workload in implementing selective subfolder synchronization in a cloud-based environment
US9135462B2 (en) 2012-08-29 2015-09-15 Box, Inc. Upload and download streaming encryption to/from a cloud-based platform
US9450926B2 (en) 2012-08-29 2016-09-20 Box, Inc. Upload and download streaming encryption to/from a cloud-based platform
US9195519B2 (en) 2012-09-06 2015-11-24 Box, Inc. Disabling the self-referential appearance of a mobile application in an intent via a background registration
US9117087B2 (en) 2012-09-06 2015-08-25 Box, Inc. System and method for creating a secure channel for inter-application communication based on intents
US9292833B2 (en) 2012-09-14 2016-03-22 Box, Inc. Batching notifications of activities that occur in a web-based collaboration environment
US10200256B2 (en) 2012-09-17 2019-02-05 Box, Inc. System and method of a manipulative handle in an interactive mobile user interface
US9553758B2 (en) 2012-09-18 2017-01-24 Box, Inc. Sandboxing individual applications to specific user folders in a cloud-based service
US10915492B2 (en) 2012-09-19 2021-02-09 Box, Inc. Cloud-based platform enabled with media content indexed for text-based searches and/or metadata extraction
US9959420B2 (en) 2012-10-02 2018-05-01 Box, Inc. System and method for enhanced security and management mechanisms for enterprise administrators in a cloud-based environment
US9705967B2 (en) 2012-10-04 2017-07-11 Box, Inc. Corporate user discovery and identification of recommended collaborators in a cloud platform
US9495364B2 (en) 2012-10-04 2016-11-15 Box, Inc. Enhanced quick search features, low-barrier commenting/interactive features in a collaboration platform
US9665349B2 (en) 2012-10-05 2017-05-30 Box, Inc. System and method for generating embeddable widgets which enable access to a cloud-based collaboration platform
US9628268B2 (en) 2012-10-17 2017-04-18 Box, Inc. Remote key management in a cloud-based environment
US10235383B2 (en) 2012-12-19 2019-03-19 Box, Inc. Method and apparatus for synchronization of items with read-only permissions in a cloud-based environment
US9396245B2 (en) 2013-01-02 2016-07-19 Box, Inc. Race condition handling in a system which incrementally updates clients with events that occurred in a cloud-based collaboration platform
US9953036B2 (en) 2013-01-09 2018-04-24 Box, Inc. File system monitoring in a system which incrementally updates clients with events that occurred in a cloud-based collaboration platform
US9507795B2 (en) 2013-01-11 2016-11-29 Box, Inc. Functionalities, features, and user interface of a synchronization client to a cloud-based environment
US10599671B2 (en) 2013-01-17 2020-03-24 Box, Inc. Conflict resolution, retry condition management, and handling of problem files for the synchronization client to a cloud-based platform
US10846074B2 (en) 2013-05-10 2020-11-24 Box, Inc. Identification and handling of items to be ignored for synchronization with a cloud-based platform by a synchronization client
US10725968B2 (en) 2013-05-10 2020-07-28 Box, Inc. Top down delete or unsynchronization on delete of and depiction of item synchronization with a synchronization client to a cloud-based platform
US9633037B2 (en) 2013-06-13 2017-04-25 Box, Inc Systems and methods for synchronization event building and/or collapsing by a synchronization component of a cloud-based platform
US10877937B2 (en) 2013-06-13 2020-12-29 Box, Inc. Systems and methods for synchronization event building and/or collapsing by a synchronization component of a cloud-based platform
US9805050B2 (en) 2013-06-21 2017-10-31 Box, Inc. Maintaining and updating file system shadows on a local device by a synchronization client of a cloud-based platform
US11531648B2 (en) 2013-06-21 2022-12-20 Box, Inc. Maintaining and updating file system shadows on a local device by a synchronization client of a cloud-based platform
US10110656B2 (en) 2013-06-25 2018-10-23 Box, Inc. Systems and methods for providing shell communication in a cloud-based platform
US10229134B2 (en) 2013-06-25 2019-03-12 Box, Inc. Systems and methods for managing upgrades, migration of user data and improving performance of a cloud-based platform
US9535924B2 (en) 2013-07-30 2017-01-03 Box, Inc. Scalability improvement in a system which incrementally updates clients with events that occurred in a cloud-based collaboration platform
US10044773B2 (en) 2013-09-13 2018-08-07 Box, Inc. System and method of a multi-functional managing user interface for accessing a cloud-based platform via mobile devices
US9213684B2 (en) 2013-09-13 2015-12-15 Box, Inc. System and method for rendering document in web browser or mobile device regardless of third-party plug-in software
US10509527B2 (en) 2013-09-13 2019-12-17 Box, Inc. Systems and methods for configuring event-based automation in cloud-based collaboration platforms
US11435865B2 (en) 2013-09-13 2022-09-06 Box, Inc. System and methods for configuring event-based automation in cloud-based collaboration platforms
US9535909B2 (en) 2013-09-13 2017-01-03 Box, Inc. Configurable event-based automation architecture for cloud-based collaboration platforms
US9483473B2 (en) 2013-09-13 2016-11-01 Box, Inc. High availability architecture for a cloud-based concurrent-access collaboration platform
US11822759B2 (en) 2013-09-13 2023-11-21 Box, Inc. System and methods for configuring event-based automation in cloud-based collaboration platforms
US9519886B2 (en) 2013-09-13 2016-12-13 Box, Inc. Simultaneous editing/accessing of content by collaborator invitation through a web-based or mobile application to a cloud-based collaboration platform
US9704137B2 (en) 2013-09-13 2017-07-11 Box, Inc. Simultaneous editing/accessing of content by collaborator invitation through a web-based or mobile application to a cloud-based collaboration platform
US8892679B1 (en) 2013-09-13 2014-11-18 Box, Inc. Mobile device, methods and user interfaces thereof in a mobile device platform featuring multifunctional access and engagement in a collaborative environment provided by a cloud-based platform
US10866931B2 (en) 2013-10-22 2020-12-15 Box, Inc. Desktop application for accessing a cloud collaboration platform
US10530854B2 (en) 2014-05-30 2020-01-07 Box, Inc. Synchronization of permissioned content in cloud-based environments
US9602514B2 (en) 2014-06-16 2017-03-21 Box, Inc. Enterprise mobility management and verification of a managed application by a content provider
US10708321B2 (en) 2014-08-29 2020-07-07 Box, Inc. Configurable metadata-based automation and content classification architecture for cloud-based collaboration platforms
US11146600B2 (en) 2014-08-29 2021-10-12 Box, Inc. Configurable metadata-based automation and content classification architecture for cloud-based collaboration platforms
US10708323B2 (en) 2014-08-29 2020-07-07 Box, Inc. Managing flow-based interactions with cloud-based shared content
US9894119B2 (en) 2014-08-29 2018-02-13 Box, Inc. Configurable metadata-based automation and content classification architecture for cloud-based collaboration platforms
US10574442B2 (en) 2014-08-29 2020-02-25 Box, Inc. Enhanced remote key management for an enterprise in a cloud-based environment
US10038731B2 (en) 2014-08-29 2018-07-31 Box, Inc. Managing flow-based interactions with cloud-based shared content
US9756022B2 (en) 2014-08-29 2017-09-05 Box, Inc. Enhanced remote key management for an enterprise in a cloud-based environment
US11876845B2 (en) 2014-08-29 2024-01-16 Box, Inc. Configurable metadata-based automation and content classification architecture for cloud-based collaboration platforms

Also Published As

Publication number Publication date
EP2177876B1 (en) 2015-12-02
EP2177876A2 (en) 2010-04-21
JP2010096761A (en) 2010-04-30
JP5424805B2 (en) 2014-02-26
EP2177876A3 (en) 2014-04-09
US7684659B1 (en) 2010-03-23

Similar Documents

Publication Publication Date Title
US7684659B1 (en) Bifilar optical fiber stowage for fiber-optic gyroscope
US8497994B2 (en) Interferometer employing a multi-waveguide optical loop path and fiber optic rotation rate sensor employing same
US6522826B2 (en) System and method of winding a fog coil
EP2278275B1 (en) Resonator fiber optic gyroscope (RFOG) with reduced bias error
US7085441B1 (en) Fiber-optic gyroscope with depolarizer using integrated optic waveguide
US20100073681A1 (en) Bias-reduced fiber optic gyroscope
JP2939412B2 (en) Optical fiber coil and method for winding optical fiber around sensor spool
EP3470785B1 (en) Flange-bonded loopback for fiber-optic gyroscope (fog)
US5848213A (en) Low shupe bias fiber optic rotation sensor coil
US10041816B2 (en) Sagnac-ring fiber-optic interferometric system with Rayleigh length spaced polarizer
JP2014098697A (en) Fiber optic gyroscope with front end polarizer
EP2230484A1 (en) Depolarizer for a fiber optic gyroscope (fog) using high birefringence photonic crystal fiber
US6539134B1 (en) Polarization transformer
JPH0743264B2 (en) Integrated optic interferometric fiber gyroscope module
JP7216951B2 (en) Interferometric fiber optic gyro and sensing coil mechanism
JPH0674776A (en) Optical fiber gyro
JP2010230476A (en) Ring laser gyro
JP2004309466A (en) Optical fiber gyroscope
JPS61184417A (en) Laser gyroscope
US9115993B1 (en) Fused PM fiber single-polarization resonator
JP2006030007A (en) Fiber-optic current sensor
WO2023211518A2 (en) Multi-axis fiber optic gyroscope photonic integrated circuit for inertial measurement units and inertial navigation systems
Medjadba et al. Modeling a multimode Sagnac interferometer: application for an embarked fiber optic gyroscope
JPH08145696A (en) Optical fiber gyroscope
JP2001227957A (en) Optical fiber gyroscope

Legal Events

Date Code Title Description
AS Assignment

Owner name: HONEYWELL INTERNATIONAL INC.,NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KALISZEK, ANDREW W.;MEAD, DEREK;TIMMONS, BRIAN P.;AND OTHERS;REEL/FRAME:021680/0969

Effective date: 20081009

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552)

Year of fee payment: 8

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 12