Optical switch

Abstract

The embodiment of the invention provides an optical switch. The optical switch comprises an optical fiber array, a collimating lens and a reflector, the optical fiber array comprises a plurality of optical fibers arranged in a matrix; the fiber core diameter of the front end part of the optical fiber is greater than the fiber core diameters of other parts; the surface of the front end part of theoptical fiber is defined as a front end surface, and the front end surface is arranged at the front focal plane of the collimating lens; and the reflecting mirror is rotatably arranged on the rear focal plane of the collimating lens. An optical signal emitted by the optical fiber is focused to the reflector through the collimating lens, and the optical signal is reflected according to a preset deflection angle of the reflector and then is incident to another optical fiber through the collimating lens. The optical fiber array is composed of a plurality of optical fibers, wherein the fiber corediameters of the front ends of the optical fibers are larger than those of other parts. The mode field radius of the light spot of the emergent light is enlarged, the focal length of the collimating lens is increased under the condition that the size of the mirror surface is kept unchanged, the allowable off-axis distance of the optical fiber on the outermost periphery of the optical fiber array is increased, and therefore the number of ports of the optical switch is increased.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of optical communication, and in particular, to an optical switch. Background technique [0002] An optical switch is a multi-port passive optical device that can control optical signals to switch between multiple optical fiber input / output ports, and is widely used in optical fiber communication systems. With the intelligent development of optical fiber communication networks, the market demand for optical switches is growing rapidly. [0003] At present, in the prior art, optical switches are divided according to the number of ports, and there are simple 1×2 and 2×2 port optical switches. In optical fiber communication systems, they are mainly used for protection switching of optical fiber lines, and their technical solutions are mainly mechanical Optical switch, which switches the light path by driving a prism or mirror through a micro relay. Large-scale N×N port optical switches a...

AI Technical Summary

Problems solved by technology

[0004] However, due to the constraints of the deflection angle of the MEMS micromirror, the size of the mirror, the focal length of the collimator lens, and the spacing of the fiber array, the number of ports N of the optical switch is limited.

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