G - Physics – 01 – C
Patent
G - Physics
01
C
G01C 19/72 (2006.01) H01S 3/067 (2006.01)
Patent
CA 2471770
A fiber optic gyroscope (FOG) including a depolarizer having substantially equal first and second fiber segments of polarization maintaining (PM) fiber coupled to a single mode (SM) fiber loop. The first PM fiber segment includes sections of fiber connected together via a splice having an angle from about 350 to 550 between major axes of polarization of the sections which it connects. Similarly, the second PM fiber segment includes sections of fiber connected together via a splice having an angle from about 350 to 550 between major axes of polarization of the sections which it connects. The length of each fiber section is chosen to maintain the thermal and mechanical symmetry of the SM fiber loop.
L'invention concerne un gyroscope à fibres optiques. Ce gyroscope comprend un dépolarisateur possédant des premier et deuxième segments égaux de fibres à maintien de polarisation (PM) couplés à une boucle de fibres (SM) monomodes . Le premier segment de fibres (PM) comprend des sections de fibres reliées ensemble via une épissure formant un angle compris entre 35 et 55· entre les grands axes de polarisation des sections qu'elle relie. De la même manière, le deuxième segment de fibres (PM) comprend des sections de fibres reliées ensemble via une épissure formant un angle compris entre 35 et 55· entre les grands axes de polarisation des sections qu'elle relie. La longueur de chaque section de fibres est choisie pour maintenir la symétrie mécanique et thermique de la boucle de fibres à maintien de polarisation (SM).
Kaliszek Andrew
Lange Charles
Szafraniec Bogdan
Gowling Lafleur Henderson Llp
Honeywell International Inc.
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