Method and device for isolating lights

Abstract

The invention discloses a method and a device for isolating lights. Incident lights penetrate through an optical filter so as to filter out lights with needless wavelengthes; the filtered incident lights rip into a 3 / 4 slide along the direction perpendicular to the 3 / 4 silde; o lights and e lights in the 3 / 4 silde have the same propagation direction and orthogonality vibration directions; and emergent lights formed by the o lights and the e lights are linearly polarized lights which are perpendicular to the slide. By utilizing the technical scheme of the invention, and under the premises of ensuring high isolation, low insertion loss, high stability, high reliability, lowered cost and simple package, the filteration effect can be achieved at the same time, so that the properties of optical products are further improved.

Description

technical field

[0001] The invention relates to the technical field of optical communication, in particular to an optical isolation method and device. Background technique

[0002] Semiconductor lasers and optical amplifiers are very sensitive to reflected light from connectors, splicing points, filters, etc., and lead to performance degradation. How to avoid the interference of reflected light has always been a major problem in the field of optical communications. The function of an optical isolator is to allow light to pass in one direction and block light in the opposite direction. The traditional optical isolator uses the non-reciprocity of Faraday rotation to change the propagation direction of the incident light and reflected light in the Faraday rotator, so that the polarization direction of the reverse light is orthogonal to the direction of the polarizer, completely blocking the reflection The transmission of light, so that the incident light passes through smoothl...

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