A multi-wavelength single-fiber bidirectional optical transceiver module and its working method

Abstract

The invention discloses a multi-wavelength single-fiber bidirectional optical transceiver module and a working method thereof. The multi-wavelength single-fiber bidirectional optical transceiver module comprises a transmitting end, a receiving end, a common end, and an optical transceiver assembly, wherein the transmitting end comprises a laser group, a collimation lens group and a wavelength division multiplexing optical assembly; the receiving end comprises a photodiode group, a convergence lens group and a wavelength division de-multiplexing optical assembly; the common end is the input / output port of an optical signal; the wavelength division multiplexing optical assembly comprises a first total-reflection mirror, a second total-reflection mirror, a first wavelength division multiplexing diaphragm and a second wavelength division multiplexing diaphragm; a wavelength division de-multiplexing optical assembly comprises an optical substrate, a first filter, a second filter, a third filter and a fourth filter; and the optical transceiver assembly comprises a first polarization light splitter, a magnetic rotation optical sheet, a 22.5-degree 1 / 2 wave plate, a first wave plate, a second polarization light splitter, a second wave plate, and a third polarization light splitter. According to the multi-wavelength single-fiber bidirectional optical module, input and output of multi-wavelength optical signals on the same fiber can be carried out, the size and the cost of the optical transceiver are reduced, the wavelength multiplexing diaphragm is easy to coat, the performance is better, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a multi-wavelength single-fiber bidirectional optical transceiver module in the technical field of optical fiber communication. Background technique [0002] Due to the rapid development of optical fiber communication, with the increase in the demand for transmission capacity of a single optical fiber (such as the transmission of video images, etc.), it is directly required to maximize the width of the optical fiber. Wavelength Division Multiplexing (WDM) technology is one of the key technologies used to increase transmission capacity. A WDM system multiplexes a plurality of optical signals whose respective wavelengths are different from each other. In recent years, WDM of optical modules has been demanded. For example, TOSA as an optical module for optical modules having a light emitting unit for wavelength multiplexing in combination with optical signals of...

AI Technical Summary

Problems solved by technology

Due to the narrow wavelength interval of the four optical signals, it is very difficult and costly to coat the wavelength division multiplexing diaphragm, which cannot be realized by domestic coating manufacturers.

Even these wavelength division multiplexing diaphragms that have been commercially available have narrow passband width, high sensitivity to incident angle, and large insertion loss

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