Squeeze-type asymmetrical double-core optical fiber switch

Abstract

The invention provides a squeeze-type asymmetrical double-core optical fiber switch, which comprises an asymmetrical double-core optical fiber, a stackable piezoelectric ceramic squeezing device and an adjustable voltage source. Two 3dB couplers are synthesized on the asymmetrical double-core optical fiber in a fused biconical taper manner, and the two couplers form a Mach-Zehnder interferometer; a ballast direction of a piezoelectric ceramic stack is perpendicular to the axial direction of the optical fiber, a fixed angle is formed between the piezoelectric ceramic stack and the position of double cores, and the piezoelectric ceramic stack is located between the two couplers. The squeeze-type asymmetrical double-core optical fiber switch is simple in structure and easy to manufacture; light paths are ensured to be relatively steady, and influence caused by environment factors, such as vibration, temperature and the like, can be effectively avoided; insertion loss is low, performance of whole optical fiber electro-optic modulation is improved, and modulation on an optical switch in a signal optical fiber can be implemented; and a modulation length necessary for the optical fiber is very short, and the shortest length can be only a few millimeters.

Description

technical field [0001] The invention relates to an interference type integrated optical signal switch, which belongs to the field of optical fiber active devices. Background technique [0002] As the basis of current communication, optoelectronic devices have become an essential part. The development of optoelectronic devices has become an important reason restricting the development of communication. The concept of "integrated optics" proposed in the late 1960s has been widely used in the processing and design of optoelectronic devices today. It integrates all the devices of an optical system on the same substrate, and connects the devices to each other through waveguides. , so that a substrate realizes the function realized by an optical system. It has the advantages of high integration, high stability, strong anti-interference, and easy mass production. However, compared with optical fibers, block integration has poor isolation, especially when it is connected with opti...

AI Technical Summary

Problems solved by technology

[0003] Most of the current optical switches contain a space optical path part, that is, the modulation that is not completely in the optical fiber, which makes the advantages of the all-fiber network lose, and the anti-vibration of the device and the impact on environmental factors are more serious.

[0004] At present, the traditional optical switches mainly include mechanical and non-mechanical types. The switching speed of the mechanical type is only on the order of milliseconds. It is relatively difficult to manufacture non-mechanical switches. For example, photoelectric materials such as lithium niobate crystals and transparent body electric ceramics are used in switch applications. , the half-wave voltage deviates from the original value due to the inherent difference in its manufacture, temperature environment and other reasons, which in turn leads to the shift of the optical polarization state and causes crosstalk between channels, affecting the switching performance

The patent document with the publication number CN 101859034 A discloses a dual-core optical fiber switch integrated in an optical fiber (disclosure date: October 13, 2010), and the entire optical fiber switch device is placed in an optical fiber, but this This kind of switch requires complex micro-processing of optical fibers and a series of pretreatments on optical fibers, which has very strict requirements on the production cost and process of optical fiber switches, and the insertion loss of this optical switch is relatively large.

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