Method for adjusting and firming components built in free space isolator

Abstract

The present invention adopts zirconium dioxide ceramics used as material making porcelain plate, according to special technique fastening isolator built-in components and parts in porcelain plate, and then fastening with magnetic loop. The present invention substantially increases free air isolator fineness and greatly reduces photo isolator cost of manufacture.

Description

Technical field [0001] The invention relates to the field of optical communication passive devices, in particular to a method for producing a free-space isolator with ceramic support with high isolation and low loss. Background technique [0002] As the competition in the communications equipment market continues to heat up, users are increasingly pushing the prices of devices down. This has brought great pressure to optical device manufacturers. They have to further reduce costs while ensuring the original quality. This is especially true for optical isolator manufacturers. For example, the price of free space single-stage optical isolators has been reduced from more than $100 to today's $15. [0003] In order to achieve such a low cost, manufacturers have to make a fuss about the material supply chain and gradually shift the mass production process to some areas with lower labor costs. However, these efforts can only reduce the cost of optical isolators. Reduced to about 15 US ...

AI Technical Summary

Problems solved by technology

[0007] However, unfortunately, there are many disadvantages in the traditional production process and method: In the traditional process, each piece of the three-layer component is directly fastened to the magnetic ring with 353DN colloid in a microscopic environment manually. The expansion coefficient of the stone and the magnetic ring is different. When heated at high temperature, the colloid will fall off and the optical path will shift after the expansion is dislocated; because the edge of the three-layer element is not sealed, it will directly cause dust, colloid or cleaning. The solvent permeates inward along the edge and cannot be cleaned, resulting in problems such as easy glue climbing and large insertion loss; due to the error between the rotation angle of the light passing through the Faraday rotator and the polarization direction of the polarizer, it cannot be effectively calibrated under this traditional process , so that the optical path shifts far, the maximum isolation wavelength drifts too much, the isolation degree is not high within the wavelength range set by the 3G system requirements, and the insertion loss becomes larger, so the defective elimination rate is often above 50%.

Afterwards, some foreign manufacturers have gone through technical transformation and used metal fixing parts to fasten the components of the isolator, and used the method of pushing the metal fixing parts to rotate for index effectiveness, and achieved certain results, but the disadvantages are: due to the structure of the metal fixing parts Design flaws lead to glue on the bottom of the polarizer to make the optical path glued; due to the unique magnetic permeability of metal materials, the magnetic field flux often changes with time, and the product is in an unstable state; due to the easy corrosion of metals, As a result, if the isolator or the active device processed with this type of isolator is in a harsh environment for a long time, the metal fixing parts are prone to rust, resulting in the pollution of the device itself; due to the magnetism of the metal itself, it is often used in the production process. There are production operation errors, so that the ideal index cannot be achieved, and the defect rate is increased; because the gap between the polarizer and Faraday is not considered in this process, the insertion loss index of the finished product will decrease with the pollution caused by time. The problem of gradual increase and the problem of easy glue climbing in the production process, so there is still no improvement in this aspect; because the size of the metal fixing parts used in this process is too small, the outer diameter is only 2.50mm, and the structure is complex, so the processing is very difficult

There are often burrs in the finished product of the fixing part, which cannot rotate smoothly and smoothly with the magnetic ring, so precise manual accuracy cannot be achieved, and the index cannot meet the needs of customers; due to the expensive material of the metal steel bracket, the size is too small, The structure is extremely complex and difficult to process, so raw materials cannot be purchased and processed in China, and currently all rely on imports, which increases the cost

[0008] The isolators produced by the current existing methods cannot be normally used in the production of active devices in 3G systems due to their drawbacks and limitations. If they are used forcibly, the consequences are often more than 50% of them are damaged in high temperature environments. Serious jitter occurs in active devices, which causes the flatness and linearity of the entire system to fail to meet the requirements

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