A damage-free tunable fiber optic power attenuator

Abstract

The invention discloses a non-damage tunable optical fiber power attenuator which comprises a threaded column and a base. The threaded column is fixed to the base, a pair of optical fiber clamps is arranged on the threaded column, the optical fiber clamps are provided with V-shaped grooves for accommodating optical fibers, and the optical fiber clamps and the threaded column are connected in a threaded mode and are opposite in rotating direction. The non-damage tunable optical fiber power attenuator utilizes bending loss of the optical fibers to achieve non-damage large-scale and high accuracy continuous power turning of an optical fiber system by adjusting the length of each optical fiber winded on the threaded column can be optionally inserted into the any position of an optical path, does not damage or change the original optical fiber system and is simple in structure, convenient to operate, reliable inter-member connection, good in stability, low in price and long in service life.

Description

technical field [0001] The invention relates to an optical electronic device, in particular to a non-damaging tunable optical fiber power attenuator. Background technique [0002] With the rapid development of the optical fiber industry, people have put forward higher requirements for optical communication devices. An optical attenuator is a device designed to reduce the transmitted optical power in a waveguide. In the path of optical fiber transmission, attenuators are needed to reduce the signal strength to the required strength. For example, for a general spectrometer, the power of the input light cannot exceed several hundred milliwatts, otherwise it will easily lead to the loss of the device. Excessive optical power in the optical receiver will lead to distortion of electrical signals and increase of nonlinearity, thereby reducing the service life of the device. Therefore, it is necessary to attenuate certain light sources before performing related tests and processi...

AI Technical Summary

Problems solved by technology

[0003] At present, a commonly used attenuator is an attenuator inserted by a connector. This attenuator has the following problems: 1. A large amount of heat enters the attenuator, which is easy to burn out the fiber optic connector or the connector of the attenuator; Part of the reflected light returns along the optical fiber, which may cause damage to the light source or the front-end system; 3. There will be a stepwise attenuation, and it is difficult to achieve zero attenuation; 4. In many cases, the optical fiber link is closed, and other optical fibers cannot be inserted. Devices that require fusion splicing of plugs that match the plug-in attenuator, which increases the melting point, destroys the integrity of the fiber optic link, and is complex to operate

However, this attenuating fiber needs to be added with impurity elements during manufacture, resulting in high production costs, poor reliability and stability

In addition, this method will also increase the melting point, complicate the operation, destroy the integrity of the optical fiber link, and the attenuation value is fixed and it is difficult to achieve continuous tuning of the attenuation

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