An integrated optical transceiver device for suppressing interference

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.

Description

Technical Field

[0001] The present invention relates to the technical field of OTDR, and more particularly to an integrated optical transceiver device capable of suppressing interference. Background Art

[0002] OTDR stands for Optical Time Domain Reflectometer. Its basic principle is to analyze backscattered or forward scattered light in an optical fiber to measure optical fiber transmission loss caused by scattering, absorption, and other factors, as well as structural loss caused by various structural defects. When a point on an optical fiber is affected by temperature or stress, the scattering characteristics of that point will change. Therefore, by displaying the corresponding relationship between loss and fiber length, OTDR can detect disturbance information distributed on the sensing fiber by external signals.

[0003] At present, in the existing integrated OTDR device solution using a 50:50 splitter, the 50% of light that is not coupled into the optical fiber will be reflected inside the OTDR device and part of it will enter the APD, causing current saturation, resulting in a first-event flat-top phenomenon and an increase in the first-event blind area, which seriously interferes with the operation of the entire OTDR.

[0004] Therefore, how to solve the problem of interference of interfering light waves on the receiving system in the prior art has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention aims to provide an integrated optical transceiver that suppresses interference, thereby resolving the prior art technical problem of interference light waves interfering with the receiving system. The various technical effects that can be achieved by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The present invention provides an integrated optical transceiver for suppressing interference, comprising:

[0008] A four-way channel, wherein the four-way channel is provided with two first channels and two second channels, each first channel is arranged opposite to each second channel, and two first channels are arranged perpendicular to each other, and two second channels are arranged perpendicular to each other;

[0009] a first laser, wherein the first laser is fixed on any one of the first channels;

[0010] a second laser, wherein the second laser is fixed on another of the first channels;

[0011] A coupling optical fiber, wherein the coupling optical fiber is fixed on one of the second channels opposite to the first laser, and an end face of the coupling optical fiber is coated with an antireflection coating;

[0012] APD, the APD is fixed on one of the second channels opposite to the second laser;

[0013] a first glass slide, the first glass slide being disposed in the cross-channel and disposed on a side close to the first laser;

[0014] a second glass slide, wherein the second glass slide is disposed in the quad, and the second glass slide is disposed on a side close to the coupling optical fiber, and an angle is formed between the first glass slide and the second glass slide;

[0015] A light guide tube is an oblique cylinder, one end of the light guide tube is arranged inside the four-way, and the other end of the light guide tube is arranged outside the four-way. The light inlet of the light guide tube is located at the top of the second glass slide. The upper and lower bottom surfaces of the light guide tube are coated with anti-reflection film, and the side of the light guide tube is coated with reflective film.

[0016] On the basis of the above technical solution, the present invention can also be improved as follows.

[0017] Furthermore, a first adjustment ring is provided between the coupling optical fiber and the quad, a second adjustment ring is provided between the second laser and the quad, and a limiting sleeve is provided between the first laser and the quad.

[0018] Furthermore, the invention further comprises a first isolator fixed on the first laser, and the first isolator is a 1310 nm isolator.

[0019] Furthermore, the invention also includes a second isolator fixed on the second laser, and the second isolator is a 1550nm isolator.

[0020] Furthermore, the first glass slide is a WDM glass slide.

[0021] Furthermore, the second glass slide is an NPBS glass slide.

[0022] Furthermore, the first laser is an FP1550 laser.

[0023] Furthermore, the second laser is an FP1310 laser.

[0024] The technical solution provided by this application has the following beneficial effects:

[0025] In the technical solution provided by the present invention, an integrated optical transceiver for suppressing interference includes a quad, a first laser, a second laser, a coupling optical fiber, an APD, a first glass slide, a second glass slide, and a light guide. The quad is provided with two first channels and two second channels, each first channel is arranged opposite to each second channel, and the two first channels are arranged perpendicular to each other, and the two second channels are arranged perpendicular to each other; the first laser is fixed on any one of the first channels; the second laser is fixed on the other first channel; the coupling optical fiber is fixed on a second channel opposite to the first laser. The APD is fixed to a second channel opposite the second laser. A first glass slide is positioned within the quad, near the first laser. A second glass slide is positioned within the quad, near the coupling fiber, with an angle between the first and second glass slides. The light guide is an oblique cylinder, with one end positioned within the quad and the other outside. The light inlet of the light guide is located at the top of the second glass slide. The upper and lower bottom surfaces of the light guide are both coated with an antireflection coating, and the sides of the light guide are coated with a reflective coating. With this arrangement, the first and second lasers are arranged perpendicular to each other. The optical signals generated by the first and second lasers pass through the first glass slide and reach the second glass slide. The signals are split by the second glass slide into 50% transmitted light and 50% reflected light. The reflected light, also known as interference light, enters the coupling fiber, while the interference light enters the light guide and is guided out of the device. Backward Rayleigh scattered light generated by light waves traveling through the coupled fiber is reflected by the second glass slide and received by the APD. This technical solution utilizes a typical integrated structure, achieving the same functionality while reducing size and simplifying the structure. Interference light reflected from the second glass slide is guided away through a light guide. This approach provides a clearer light transmission path. Once guided away, the interference light cannot return to the APD, preventing it from affecting the reception of the desired optical signal. This solves the problem of interference light waves interfering with the receiving system in existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 2 is a schematic diagram of the overall structure of an integrated optical transceiver device for suppressing interference in an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Four-way laser; 2. First laser; 3. Second laser; 4. Coupling fiber; 5. APD; 6. First glass slide; 7. Second glass slide; 8. Light guide; 9. First adjustment ring; 10. Second adjustment ring; 11. Limit sleeve; 12. First isolator; 13. Second isolator. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0031] The purpose of this specific embodiment is to provide an integrated optical transceiver device that suppresses interference, thereby solving the problem in the prior art of interference light waves causing interference to the receiving system.

[0032] The following embodiments are described with reference to the accompanying drawings. The embodiments described below do not limit the invention as set forth in the claims. Furthermore, the entire contents of the configurations shown in the following embodiments are not necessarily required to serve as solutions to the invention as set forth in the claims.

[0033] See also Figure 1, this embodiment provides an integrated optical transceiver for suppressing interference, including a four-way channel 1, a first laser 2, a second laser 3, a coupling optical fiber 4, an APD 5, a first glass slide 6, a second glass slide 7 and a light guide 8. In this embodiment, the first laser 2 and the second laser 3 are coupled to the coupling optical fiber 4 and then fixed by laser welding; the first laser 2, the second laser 3, the first glass slide 6 and the second glass slide 7 can be set according to the specific use environment. In this embodiment, the first laser 2 is preferably an FP1550 laser, and the second laser 3 is preferably an FP1310 laser; in this embodiment, the first glass slide 6 is preferably a WDM glass slide, and the second glass slide 7 is preferably an NPBS glass slide; the four-way channel 1 is provided with two first channels and two second channels, each first channel is arranged opposite to each second channel, and the two first channels are arranged perpendicular to each other, and the two second channels are arranged perpendicular to each other; the first laser 2 is fixed on any one of the first channels; the second laser 3 is fixed on another first channel; the coupling optical fiber 4 is fixed on a second channel opposite to the first laser 2, and the end face of the coupling optical fiber 4 is coated with an anti-reflection film, which can suppress the reflection generated by the optical signal when passing through the end face, thereby achieving the same effect of suppressing receiver saturation as step one; the APD5 is fixed on a second channel opposite to the second laser 3. In this embodiment, the APD5 is fixed to the bottom of the transceiver using a gluing process; the first glass slide 6 is arranged in the quad 1, and the first glass slide 6 is arranged on the side close to the first laser 2; the second glass slide 7 is arranged in the quad 1, and the second glass slide 7 is arranged on the side close to the coupling optical fiber 4, and an angle is formed between the first glass slide 6 and the second glass slide 7; the light guide 8 is an oblique cylinder, one end of the light guide 8 is arranged in the quad 1, and the other end of the light guide 8 is arranged outside the quad 1, and the light inlet of the light guide 8 is located at the top of the second glass slide 7. In this embodiment, the upper and lower bottom surfaces of the light guide 8 are coated with anti-reflection films, and the side of the light guide 8 is coated with a reflective film.

[0034] With this arrangement, the first laser 2 and the second laser 3 are arranged perpendicular to each other. The optical signals generated by the first and second lasers 2 and 3 pass through the first glass slide 6 and reach the second glass slide 7. The signals are then split by the second glass slide 7 into 50% transmitted light and 50% reflected light. The reflected light, also known as interference light, enters the coupling fiber 4. The interference light enters the light guide 8 and is then guided out of the device by the light guide 8. The backscattered Rayleigh light generated by the light waves propagating through the coupling fiber 4 is reflected by the second glass slide 7 and received by the APD 5. This technical solution adopts a typical integrated structure, achieving the same function while reducing the size and simplifying the structure. The interference light reflected from the second glass slide 7 is guided out by the light guide 8. This method clarifies the light wave transmission path. Once guided out, the interference light cannot return to the APD 5, preventing it from affecting the reception of the useful optical signal. This solves the problem of interference light waves causing interference to the receiving system in the prior art.

[0035] As an optional embodiment, a first adjustment ring 9 is provided between the coupling optical fiber 4 and the quad 1 , a second adjustment ring 10 is provided between the second laser 3 and the quad 1 , and a limiting sleeve 11 is provided between the first laser 2 and the quad 1 .

[0036] A more specific embodiment further includes a first isolator 12 fixed on the first laser 2. In this embodiment, the first isolator 12 is preferably a 1310 nm isolator.

[0037] A more specific embodiment further includes a second isolator 13 fixed on the second laser 3. In this embodiment, the second isolator 13 is preferably a 1550 nm isolator.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An integrated optical transceiver device for suppressing interference, characterized in that: include: A four-way channel, wherein the four-way channel is provided with two first channels and two second channels, each first channel is arranged opposite to each second channel, and two first channels are arranged perpendicular to each other, and two second channels are arranged perpendicular to each other; a first laser, wherein the first laser is fixed on any one of the first channels; a second laser, wherein the second laser is fixed on another of the first channels; A coupling optical fiber, wherein the coupling optical fiber is fixed on one of the second channels opposite to the first laser, and an end face of the coupling optical fiber is coated with an antireflection coating; APD, the APD is fixed on one of the second channels opposite to the second laser; a first glass slide, the first glass slide being disposed in the quad and disposed on a side close to the first laser; a second glass slide, wherein the second glass slide is disposed in the quad, and the second glass slide is disposed on a side close to the coupling optical fiber, and an angle is formed between the first glass slide and the second glass slide; A light guide is an oblique cylinder, one end of which is disposed within the spool, and the other end of which is disposed outside the spool. The light inlet of the light guide is located at the top of the second glass slide. The upper and lower bottom surfaces of the light guide are both coated with an anti-reflection film, and the sides of the light guide are coated with a reflective film. Interference light reflected from the second glass slide is guided out through the light guide, which makes the light wave transmission path clearer. After the interference light is guided out, it cannot return to the APD, thereby preventing it from affecting the reception of useful light signals. A first adjustment ring is provided between the coupling optical fiber and the quad, a second adjustment ring is provided between the second laser and the quad, and a limited position sleeve is provided between the first laser and the quad; Also included is a second isolator fixed on the second laser, and the second isolator is a 1550nm isolator; The system further includes a first isolator fixed on the first laser, and the first isolator is a 1310 nm isolator.

2. The optical transceiver integrated device for suppressing interference according to claim 1, characterized in that: The first glass slide is a WDM glass slide.

3. The optical transceiver integrated device for suppressing interference according to claim 1, characterized in that: The second slide is an NPBS slide.

4. The optical transceiver integrated device for suppressing interference according to claim 1, characterized in that: The first laser is an FP1550 laser.

5. The optical transceiver integrated device for suppressing interference according to claim 1, characterized in that: The second laser is an FP1310 laser.

Images