Novel single-fiber three-dimensional optical assembly device

Abstract

The invention discloses a novel single-fiber three-dimensional optical assembly device. The novel single-fiber three-dimensional optical assembly device includes a Base cavity, a laser, a digital signal detector, an analog signal detector, an analog signal detector 0-degree light splitting sheet, a digital signal detector 0-degree light splitting sheet, an optical fiber, two 45-degree light splitting sheets, a concave structure silicon-based pedestal, an aspherical lens, an isolator, and a self-focusing lens; the aspherical lens and the isolator are successively arranged in a light path between the laser and one 45-degree light splitting sheet, the self-focusing lens is arranged in a light path between the optical fiber and the other 45-degree light splitting sheet, the silicon-based pedestal is provided with two 45-degree light splitting sheet grooves, two 45-degree light splitting sheets are respectively clamped in the two 45-degree light splitting sheet grooves, and the left side surface and the right side surface of the silicon-based pedestal are respectively provided with a stepped mounting hole and a self-focusing lens mounting hole. According to the novel single-fiber three-dimensional optical assembly device in the invention, the coupling efficiency is high, the isolator is small in size, the problem of light crosstalk can be solved, the good temperature characteristics and the good wavelength characteristics are achieved, the encapsulation difficulty is small, and the rejection rate is low.

Description

technical field [0001] The invention belongs to the technical field of optical transmission, and in particular relates to a novel single-fiber three-way optical component device. Background technique [0002] With the rapid development of the Internet and the emergence of various high-bandwidth services, fiber-to-the-home (FTTH) based on optical network transmission has become the only way to solve this problem. [0003] The single-fiber three-way optical component is a core component of the passive optical network technology in FTTH. Its function is to couple the two optical signals output from the same optical fiber into a digital signal receiver and an analog signal receiver respectively. The optical signal emitted by another digital signal transmitter is coupled into the optical fiber. According to the ITUG.983 standard of the International Telecommunication Union, the downlink analog cable TV network (CATV) signal transmission uses 1550nm wavelength, the downlink user ...

AI Technical Summary

Problems solved by technology

[0012] 1. Use methods such as adding optical isolators or filters to solve the problem of optical crosstalk. The main components of traditional optical isolators or filters are yttrium iron garnet (YIG) crystals or highly doped Ce 3+ 、Bi 3+ Garnet crystals, these garnet crystals have small Verdet coefficients and poor temperature and wavelength effects, and the size required to meet the required deflection angle of the device is large, which is not conducive to the improvement of integration;

[0013] 2. Using ball lens for coupling or processing the end face of the fiber into a spade shape, the coupling efficiency is low;

[0014] 3. The packaging is difficult, requires high technical proficiency of workers, low production efficiency, and there are problems such as the filter is easy to scratch, and the scrap rate and cost are high;

[0015] Performance parameters such as coupling optical power and optical crosstalk of current single-fiber three-way optical components seriously restrict signal transmission quality and system stability, and limit FTTH to develop in the direction of high speed

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