Optical fiber measuring device, gyrometer, central...

Details Optical fiber measuring device, gyrometer, central... Optical fiber measuring device, gyrometer, central...

G - Physics

01

C

345/10

G01C 19/72 (2006.01)

Patent

CA 2030131

The invention relates to a fibre optic measuring device of the type in which the change in a measured parameter generates a phase difference between two waves in a SAGNAC ring interferometer (2). Electronic means (7) comprise a processing system (9) delivering a signal depending on the measured parameter and electronic means (12) controlling the phase modulator (4). The electronic means (12) produce a control signal for the modulator determined in such a way that the phase difference 54m which it produces between the counter-propagating waves periodically takes the following four successive values: .delta.~1 = .delta.o .delta.~3 = a~o .delta.~2 = - .delta.o .delta.~4 = - a~o where ~o is a constant phase shift and it depends on a, and a is a positive constant satisfying the condition: cos~o = cosa~o. The gain of the channel for controlling the modulation is kept constant by producing a signal depending on the said gain by exploiting the four values x1, x2, x3, x4 delivered in response to a period of the modulation signal according to the expression (x1 + x3) -(x2 + x4), the said signal acting on the modulator in such a way as to keep the gain constant.

Affiliated with

Also associated with

Rating

Optical fiber measuring device, gyrometer, central... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical fiber measuring device, gyrometer, central..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fiber measuring device, gyrometer, central... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1682090