Method for producing tunable optical fiber attenuator

Abstract

The method of producing tunable optical fiber attenuator for light communication network includes the steps of: preparing two glass substrates with transparent conducting film, painting a 5-10 micron thick mixture of photocured prepolymer and liquid crystal to constitue record layer, designing laser holographic optical path in laser holographic or computer holographic method to establish planar interference, to form diffraction grating and to make the liquid crystal grating element. The liquid crystal grating has electric field tunable diffraction characteristic, that is, altering the strength of the AC electric signal applied to the liquid crystal grating element can control the diffraction light strength passing through the grating element and reach the aim of attenuate light power and regulating the power of transmitted light signal in the channel. The attenuator has low insertion loss, high resolution, high linearity, high repeatability, great attenuation range, high attenuation precision, small device size and other high quality.

Description

technical field [0001] The invention relates to a non-mechanical tunable optical fiber attenuator manufacturing method, which belongs to the field of optical communication. Background technique [0002] Tunable optical fiber attenuator is an important device in DWDM communication system and all-optical network. It is used to adjust the strength of each signal power in the communication system to ensure the stable operation of the system. It can be used for evaluation, research, adjustment and correction of optical communication lines and systems. Optical attenuator is one of the earliest passive devices in optical communication. Among passive devices, its output is second only to connectors, couplers and other devices. At present, the tunable optical attenuator products used in the market mostly adopt the method of moving the gradient light absorption attenuator. The disadvantage of this method is that the attenuator is difficult to manufacture and expensive. At the same t...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of the existing tunable optical attenuator products, such as the difficulty in making the attenuator and the high price caused by the manufacturing method of the mechanically moving gradual light absorption attenuator, and to provide a non-mechanical, low-power consumption The manufacturing method of the novel adjustable optical attenuator which is fast, beneficial to the miniaturization and integration of the system

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