| Optical isolator is not only a passive device that allows the light forwardtransmission and reverse-blocking, but an optical non-mutual heterosexualunidirectional transmission device, similar to the diode function in an electronicdevice. It is widely used in lasers, EDFA, and other fields, can effectively prevent theoccurrence of optical feedback. With the rapid development of optical communicationtechnology, high-speed, high-capacity optical fiber communication has an urgentrequirement of optical isolator in the direction toward the high-performance,miniaturization, arrayed, low-cost, no polarization film dispersion development.To meet the development of market, this article introduces a new productionmethod of3×3array polarization independent optical isolator, which can realize threeoptical Isolator’s performance with only one device dimension. The main contents areas follows:1. This article introduces the development status and trends of the optical isolatorand application of isolators in an optical communication system. It presents two newoptical array isolator design and analysis applications, advantages and disadvantages.2. The article describes the structure, working principle, parameter definitionsand test methods of the3×3optical isolator. Focus on analysis of the wedge-shapedpolarization-independent optimization design of the structure of the dual-stage opticalisolator core, using different angles on the front and rear levels, to enhance theperformance of the isolation. By analyzing the adjusting assembly process, chose Clens rather than G lens and a font fiber head as a solution comprising of the3×3arrayoptical isolator. Array collimator coupling loss was analyzed of declination andinclination.Finally, complete the new3×3array polarization independent optical isolator ofthe actual sample production and data test. The test results show that the design isreasonable, which has reached the expected overall index requirements of a new typeof array optical isolator. |
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