An integrated optical transceiver device for suppressing interference

By adopting the four-way structure and light pipe design in the OTDR device, the problem of interference light waves on the receiving system is solved, and the light wave transmission path is clarified and the structure is simplified.

CN116679390BActive Publication Date: 2025-09-23GUILIN G LINK TECH +1
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Patent Information

Application Number
CN202310856455.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2023-05-08
Filing Date
2023-07-13
Publication Date
2025-09-23
Estimated Expiration
2043-07-13

AI Technical Summary

Technical Problem

In the prior art, in the integrated OTDR device solution with a 50:50 splitter, 50% of the light not coupled into the optical fiber is reflected inside the OTDR device, resulting in a first-event flat-top phenomenon, increasing the first-event blind zone and interfering with the normal operation of the receiving system.

Method used

The integrated optical transceiver adopts a four-way structure. By setting up the first and second lasers, coupling optical fibers, APD, first and second glass slides and light guides, the vertical arrangement and splitting of optical signals are achieved. The transmitted light enters the coupling optical fiber, and the reflected light is guided out of the device through the light guide to prevent interference light from returning to the APD.

Benefits of technology

The light wave transmission path is clarified, the influence of interference light on the receiving system is avoided, the device volume is compressed and the structure is simplified.

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Abstract

The present invention discloses an integrated optical transceiver for suppressing interference, and relates to the technical field of OTDR. A quad is provided with two first channels and two second channels; a first laser is fixed on any one of the first channels; a second laser is fixed on the other first channel; a coupling optical fiber is fixed on a second channel opposite to the first laser; an APD is fixed on a second channel opposite to the second laser; a first glass slide is provided in the quad and is provided on a side close to the first laser; a second glass slide is provided in the quad and is provided on a side close to the coupling optical fiber, and an angle is formed between the first and second glass slides; a light guide is an oblique cylinder, one end of the light guide is provided in the quad and the other end of the light guide is provided outside the quad, and the light inlet of the light guide is located on the top of the second glass slide; thereby solving the problem of interference light waves causing interference to the receiving system in the prior art.
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