Single mode fiber depolarized optical fiber loop coiling device

Abstract

The invention discloses a reeling device for depolarizing single mode optical fiber ring. Two supporting elements are respectively disposed at the two sides of a chassis, a rotating shaft is installed at the front side face of one supporting element and driven to rotate by a motor arranged on the supporting element, a baffle and a reeled ring are disposed on the rotating shaft, one end of a connecting rod is fixedly connected with the rotating shaft, the other end of the connecting rod is provided with a fixed shaft, a baffle and a preparative ring are disposed on the fixed shaft, a rotating shaft is installed on the other supporting element and driven to rotate by a motor arranged on the supporting element, the rotating shaft is connected with the short arm of an L-shaped bracket, a rotating shaft is installed on the long arm of the L-shaped bracket and arranged with a baffle and a preparative ring, a horizontal guide track is disposed on the chassis, and a sliding block arranged with a motor is capable of sliding in the horizontal guide track. The invention can twist the single mode optical fiber while reeling, so as to obtain a single mode optical fiber ring with depolarizing function. Therefore, the optical fiber gyroscope system can omit depolarizer, so as to simplify the system, and reduce the optical energy loss and measurement error of the gyroscope system.

Description

technical field [0001] The invention relates to a device for complex winding processes of optical fibers, in particular to a winding device for a depolarized optical fiber ring using single-mode optical fibers. Background technique [0002] Single-mode fiber actually has two polarization modes. The two modes are nearly degenerate, with residual birefringence that changes the polarization state of the propagating light. In a ring interferometer, given a position, the polarization states of the two counterpropagating light waves are different, and due to birefringence, the refractive indices experienced are not exactly the same, thus producing a parasitic phase difference at the output. This violates the very important reciprocity condition for fiber optic gyroscopes. Therefore, the traditional fiber optic gyroscope system will place a depolarizer on the common reciprocity port to eliminate the parasitic phase difference as much as possible. However, coupling the depolarize...

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Problems solved by technology

However, polarization maintaining fiber is expensive, which is very unfavorable for mass production

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