Optical device capable of realizing backlight monitoring

Abstract

The utility model discloses an optical device capable of realizing backlight monitoring, which comprises a lens base body, a reflecting surface is formed in the lens base body, a first lens is formed at the bottom of the lens base body, a second lens is formed at the front end of the lens base body, the front end of the lens base body is used for being connected with an optical fiber, and the second lens is used for being connected with the optical fiber. The bottom of the lens base body is fixedly provided with a plane light-transmitting plate which is obliquely arranged, a VCSEL chip and an MPD chip are arranged below the plane light-transmitting plate, an optical signal emitted by the VCSEL chip penetrates through the plane light-transmitting plate and then enters the first lens, the optical signal is collimated by the first lens and then is transmitted to the reflecting surface, and the MPD chip enters the reflecting surface after being collimated by the second lens. The optical signals emitted by the VCSEL chip are transmitted to the second lens after being reflected by the reflecting surface and then focused on the end face of the optical fiber through the second lens, and part of the optical signals emitted by the VCSEL chip are reflected to the MPD chip through the plane light-transmitting plate. According to the utility model, the MPD monitoring function can be realized, and the advantages of simplified optical path, simple structure, good compatibility and the like are realized.

Description

Technical Field

[0001] The utility model relates to an optical fiber transmission lens device, in particular to an optical device capable of realizing backlight monitoring. Background Art

[0002] Optical communication lens devices are key materials used in data communication optical modules. Their performance directly determines the data transmission performance of the optical modules. However, in the actual application and use of optical modules, the working status of the optical modules also needs to be monitored. In existing technologies, MPD chips can be used to monitor and diagnose the working status of optical modules. That is, when an optical module fails, parameters such as optical power monitored by the MPD chip will change. By analyzing the data monitored by the MPD, technicians can quickly locate the fault point. Based on this information, technicians can conduct targeted inspections and repairs, thereby improving the efficiency of troubleshooting. However, among existing optical devices, most products do not have MPD monitoring functions. Although a small number of optical devices can be installed with MPD chips, they also require the design and manufacture of special optical paths. This not only makes the product optical path complex, but also easily causes large fluctuations in optical power and unstable optical signals. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an optical device which can realize the MPD monitoring function, simplifies the optical path, has a simple structure and good compatibility, in view of the deficiencies in the existing technology.

[0004] In order to solve the above technical problems, the present utility model adopts the following technical solutions.

[0005] An optical device capable of implementing backlight monitoring includes a lens base, a reflective surface formed within the lens base, a first lens formed at the bottom of the lens base, a second lens formed at the front end of the lens base, the front end of the lens base being used to connect to an optical fiber, an obliquely arranged flat light-transmitting plate fixed to the bottom of the lens base, a VCSEL chip and an MPD chip provided below the flat light-transmitting plate, an optical signal emitted by the VCSEL chip passing through the flat light-transmitting plate and incident on the first lens, the optical signal being collimated by the first lens and transmitted to the reflective surface, being reflected by the reflective surface and then transmitted to the second lens, and then being focused on the end face of the optical fiber by the second lens, and a portion of the optical signal emitted by the VCSEL chip being reflected by the flat light-transmitting plate to the MPD chip.

[0006] Preferably, a reflective film is coated on the surface of any one side of the planar light-transmitting plate.

[0007] Preferably, the planar light-transmitting plate is a glass sheet.

[0008] Preferably, a concave cavity is formed at the bottom of the lens base, and the first lens is formed on the top wall of the concave cavity.

[0009] Preferably, a top wall of the cavity is formed with an inclined fixing portion, and one end of the planar light-transmitting plate is fitted and fixed to the inclined fixing portion.

[0010] Preferably, the planar light-transmitting plate and the inclined fixing portion are bonded together by glue.

[0011] Preferably, the planar light-transmitting plate is in the shape of an elongated strip.

[0012] The optical device disclosed in the present invention that can realize backlight monitoring includes an optical signal transmission optical path and a backlight monitoring pipeline. For the optical signal transmission pipeline, most of the optical signals emitted by the VCSEL chip directly pass through the flat light-transmitting plate and then enter the first lens. This part of the optical signal is collimated by the first lens and transmitted to the reflecting surface, and then reflected by the reflecting surface and transmitted to the second lens. Finally, it is focused on the end face of the optical fiber through the second lens, thereby realizing normal transmission of the optical signal. At the same time, because the VCSEL chip and the MPD chip are both located below the flat light-transmitting plate, part of the optical signal emitted by the VCSEL chip is also reflected by the flat light-transmitting plate to the MPD chip. The MPD chip is used to synchronously collect the reflected optical signals, and the communication system can achieve the purpose of MPD backlight monitoring based on the electrical signal feedback from the MPD chip. Based on the above structural principle, the utility model not only realizes the MPD monitoring function, but also simply adds the flat light-transmitting plate to the existing optical device. Not only is the product structure simple, but the optical path is also simplified. In addition, in actual applications, whether to set the MPD chip and the flat light-transmitting plate can be selected according to product requirements, which has better compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is an optical device for three-dimensional Figure 1 ;

[0014] Figure 2 The utility model is an optical device for three-dimensional Figure 2 ;

[0015] Figure 3 This is a cross-sectional view of the optical device of the utility model;

[0016] Figure 4 This is a schematic diagram of the optical path of the optical device of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0018] The utility model discloses an optical device capable of realizing backlight monitoring, Figures 1 to 4 As shown, it includes a lens base 1, a reflecting surface 2 is formed in the lens base 1, a first lens 3 is formed at the bottom of the lens base 1, a second lens 4 is formed at the front end of the lens base 1, the front end of the lens base 1 is used to connect to the optical fiber 5, and an obliquely arranged flat light-transmitting plate 6 is fixed to the bottom of the lens base 1, a VCSEL chip 7 and an MPD chip 8 are provided below the flat light-transmitting plate 6, the optical signal emitted by the VCSEL chip 7 passes through the flat light-transmitting plate 6 and is incident on the first lens 3, the optical signal is collimated by the first lens 3 and transmitted to the reflecting surface 2, and is reflected by the reflecting surface 2 and transmitted to the second lens 4, and then is focused on the end face of the optical fiber 5 by the second lens 4, and part of the optical signal emitted by the VCSEL chip 7 is reflected by the flat light-transmitting plate 6 to the MPD chip 8.

[0019] The above structure includes an optical signal transmission path and a backlight monitoring pipeline. For the optical signal transmission pipeline, most of the optical signals emitted by the VCSEL chip 7 directly pass through the planar light-transmitting plate 6 and then enter the first lens 3. This part of the optical signal is collimated by the first lens 3 and transmitted to the reflecting surface 2, and then reflected by the reflecting surface 2 and transmitted to the second lens 4. Finally, it is focused on the end face of the optical fiber 5 through the second lens 4, thereby realizing normal transmission of the optical signal. At the same time, because the VCSEL chip 7 and the MPD chip 8 are both located below the planar light-transmitting plate 6, part of the optical signal emitted by the VCSEL chip 7 is also reflected by the planar light-transmitting plate 6 to the MPD chip 8. The MPD chip 8 is used to synchronously collect the reflected optical signal. The communication system can achieve the purpose of MPD backlight monitoring based on the electrical signal feedback from the MPD chip 8. Based on the above structural principle, the present invention not only realizes the MPD monitoring function, but also simply adds the flat light-transmitting plate 6 on the basis of the existing optical device. Not only is the product structure simple, but the optical path is also simplified. In addition, in actual applications, it is also possible to choose whether to set the MPD chip 8 and the flat light-transmitting plate 6 according to product requirements, which has better compatibility.

[0020] In practical applications, both the front and rear surfaces of the planar light-transmitting plate 6 can be coated with a reflective film, thereby achieving control of the reflected energy. In this embodiment, a reflective film is coated on any one side surface of the planar light-transmitting plate 6 .

[0021] As a preferred embodiment, the flat light-transmitting plate 6 is a glass sheet. In this embodiment, the lens substrate 1 can be a plastic substrate.

[0022] Regarding the preferred installation positions of the first lens 3 and the planar light-transmitting plate 6, in this embodiment, please refer to Figure 3 A cavity 10 is formed at the bottom of the lens base 1 , and the first lens 3 is formed on the top wall of the cavity 10 .

[0023] Furthermore, the top wall of the cavity 10 is formed with a beveled fixing portion 11, to which one end of the planar light-transmitting plate 6 is affixed. In practical applications, the inclination angle of the planar light-transmitting plate 6 can be flexibly adjusted according to design requirements, and the specific adjustment method can be determined by the structure of the lens base 1 and the optical path design. In addition, the advantage of the beveled fixing portion 11 in this embodiment is that when the MPD monitoring function is not required, the planar light-transmitting plate 6 can be removed from the beveled fixing portion 11, thereby being compatible with application requirements with or without the MPD monitoring function.

[0024] In order to reliably fix the planar light-transmitting plate 6 , in this embodiment, the planar light-transmitting plate 6 and the inclined surface fixing portion 11 are bonded together by glue.

[0025] In this embodiment, since there are multiple optical fibers and lenses, the number of the VCSEL chip 7 and the MPD chip 8 is single or multiple in array distribution, and the planar light-transmitting plate 6 is in the shape of a long strip.

[0026] The optical device for backlight monitoring disclosed in this utility model has a simple structure and can be implemented by simply modifying the main framework of an existing optical lens device. This reduces manufacturing costs and makes it easy to implement. Furthermore, the device is compatible with applications requiring or not requiring MPD backlight monitoring. Furthermore, by coating the glass with a gauge, the optical power attenuation at the emitting end of the plastic lens can be adjusted. Overall, the optical device exhibits stable optical power and minimal optical signal fluctuation during use.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. An optical device capable of realizing backlight monitoring, characterized in that: The invention comprises a lens base (1), wherein a reflecting surface (2) is formed in the lens base (1), a first lens (3) is formed at the bottom of the lens base (1), a second lens (4) is formed at the front end of the lens base (1), the front end of the lens base (1) is used to connect to an optical fiber (5), an obliquely arranged plane light-transmitting plate (6) is fixed to the bottom of the lens base (1), a VCSEL chip (7) and an MPD chip (8) are arranged below the plane light-transmitting plate (6), an optical signal emitted by the VCSEL chip (7) passes through the plane light-transmitting plate (6) and is incident on the first lens (3), the optical signal is collimated by the first lens (3) and then transmitted to the reflecting surface (2), is reflected by the reflecting surface (2) and then transmitted to the second lens (4), and is then focused on the end face of the optical fiber (5) by the second lens (4), and part of the optical signal emitted by the VCSEL chip (7) is reflected by the plane light-transmitting plate (6) to the MPD chip (8).

2. The optical device capable of implementing backlight monitoring according to claim 1, wherein: A reflective film is plated on the surface of any one side of the planar light-transmitting plate (6).

3. The optical device capable of implementing backlight monitoring according to claim 1, wherein: The flat light-transmitting plate (6) is a glass sheet.

4. The optical device capable of implementing backlight monitoring according to claim 1, wherein: A concave cavity (10) is formed at the bottom of the lens base (1), and the first lens (3) is formed on the top wall of the concave cavity (10).

5. The optical device capable of implementing backlight monitoring according to claim 4, wherein: The top wall of the cavity (10) is formed with an inclined surface fixing portion (11), and one end of the planar light-transmitting plate (6) is fitted and fixed to the inclined surface fixing portion (11).

6. The optical device capable of implementing backlight monitoring according to claim 5, wherein: The flat light-transmitting plate (6) and the inclined surface fixing portion (11) are bonded together by glue.

7. The optical device capable of implementing backlight monitoring according to claim 1, wherein: The planar light-transmitting plate (6) is in the shape of an elongated strip.

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