Fiber optic acousto-optic switch

Abstract

The invention discloses an acousto optic fiber optical switch. N input end collimators and n output end collimators are arranged in a housing, n acousto-optic devices are arranged between the input end collimators and the output end collimators, and the input end collimators and the output end collimators are connected to optic fibers correspondingly. The input end collimators and the output end collimators and the acousto-optic devices are corresponded; the acousto-optic devices array on the optical path sequentially; parallel prisms are arranged between two adjacent acousto-optic devices, each parallel prism is used for changing the direction of the diffraction light produced by the front adjacent acousto-optic device to allow the diffraction light to enter a corresponded receiving end collimator, the level 0 light transmission direction of the front acousto-optic device is not influenced, and the diffraction light is output from the optical fiber corresponding to the receiving end collimator. By the aid of the switch, the defect that one optical fiber (or optical fiber collimator) of the receiving end is provided with light constantly is solved, and the problem that the optical frequency of two optical fibers of the receiving end are inconsistent is solved.

Description

technical field [0001] The invention relates to an optical device, in particular to an optical switch used in the optical fiber field, and belongs to the field of acousto-optic technology. Background technique [0002] In an all-optical network, an optical switch is a core device that implements functions such as optical add-drop multiplexing, optical cross-connect, network monitoring, and self-healing protection. With the rapid growth of data services, in order to meet the requirements of all-optical communication, the performance requirements of all-optical communication networks for optical switches are also getting higher and higher. [0003] The acousto-optic switch is an optical switch made using the acousto-optic effect. Its basic principle is to use sound waves to deflect light. The deflection angle of the deflected light is proportional to the frequency of the sound wave, and the intensity of the deflected light is proportional to the intensity of the sound wave wit...

AI Technical Summary

Problems solved by technology

Limited by the principle of the acousto-optic effect, this fiber-optic acousto-optic switch has two disadvantages: first, the optical fiber receiving 0-level light always has light (greater than 5% of the incident light energy), and cannot work with a light intensity of 0 second, compared with the incident light, the zero-order light has no frequency shift, and the diffracted light has a frequency shift, resulting in inconsistent optical frequencies in the two optical fibers at the receiving end. These two shortcomings make the current optical fiber acousto-optic optical switch unable to meet Many optical signal processing requirements

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