A dense wavelength division multiplexing optical transceiver component based on pon system

Abstract

A dense wavelength division multiplexing optical transceiver assembly based on a PON system, comprising a semiconductor laser (1), a structural base (2), a photoelectric detector (3), a ferrule (4) and a polygonal prism (5), the polygonal prism (5) being coated with different types of coating films. By using small-angle coating films, the invention decreases the deterioration of a pass-stop band caused by changes in the angle of incidence, realizes the separation of two kinds of light with wavebands close to each other by a filter film in the case of incidence of converged light, and integrates all films into the surface of one polygonal prism, facilitating installation, simplifying the process, improving production efficiency and the precision of machining structural parts; the angle of incidence of the laser is changed by adjusting the angle of inclination of the surface of the prism, thereby improving coupling efficiency.

Description

technical field [0001] The invention relates to the field of communication engineering, in particular to optical communication technology. Background technique [0002] BOSA is a single-fiber transceiver bidirectional component, which is the core component of the optical communication system. The BOSA component with dense wavelength division multiplexing puts forward new requirements for the wavelength interval of the transceiver. The filter can separate two beams of light with a divergence angle of 8°, but when the wavelength interval of the light at the transceiver end is reduced to about 20nm, the 45° filter cannot separate the two beams of light with a convergence angle of 8° with high quality. The light is separated, because the 45° filter will change with the incident angle, and the pass-stop band will be seriously distorted, so that the transmittance of the transmitted light will decrease, the power of the outgoing fiber will decrease, the reflectivity of the reflecte...

AI Technical Summary

Problems solved by technology

[0002] BOSA is a single-fiber transceiver bidirectional component, which is the core component of the optical communication system. The BOSA component with dense wavelength division multiplexing puts forward new requirements for the wavelength interval of the transceiver. The filter can separate two beams of light with a divergence angle of 8°, but when the wavelength interval of the light at the transceiver end is reduced to about 20nm, the 45° filter cannot separate the two beams of light with a convergence angle of 8° with high quality. The light is separated, because the 45° filter will change with the incident angle, and the pass-stop band will be seriously distorted, so that the transmittance of the transmitted light will decrease, the power of the outgoing fiber will decrease, the reflectivity of the reflected light will decrease, and the sensitivity of the receiving end will decrease severely. The pass-stop band of the small angle (13°-22.5°) filter film changes with the incident angle much smaller than that of the 45° filter film

[0003] In the optical component with integrated transceiver, the 45° filter plays the role of separating the optical path of the receiving end from the optical path of the transmitting end, but the pass-stop band of the 45° filter will seriously deteriorate with the change of the incident angle, when the wavelength of the transmitting and receiving end is small At about 20nm, it is impossible to separate the optical path of the transceiver end and ensure a high degree of isolator. If the scheme of collimating the optical path of the transceiver end is adopted, it will bring a complicated structure and high cost. In addition, for the structure of multiple filters , it needs to be assembled multiple times and undergo multiple glue curing processes, which wastes a lot of time and the assembly process is complicated, and the structural processing is also difficult to guarantee.

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