Optical transceiver device based on front light monitoring

Abstract

The utility model discloses an optical transceiver device based on front light monitoring, which comprises a shell with at least one optical port and a light-transmitting module arranged in the shell, and further comprises at least one laser Vcsel which is matched with the light-transmitting module and is used for constructing a transmitting optical path; the at least one photodiode PD is matched with the light-transmitting module and used for constructing a receiving light path, and the PD is configured to be close to one side of the light port; the photoelectric detection diode MPD is arranged between the Vcsel and the PD to realize front light detection; wherein a special-shaped surface I and a special-shaped surface II which are matched with each Vcsel and each PD are respectively arranged on the light-transmitting module, and the range of an included angle formed by each free end surface in the special-shaped surface I and each free end surface in the special-shaped surface II is 135-225 degrees. According to the optical transceiver device based on front light monitoring provided by the utility model, a transmission optical path is designed in the light-transmitting module, so that the transmission requirement of the optical path can be realized only through the light-transmitting module, the processing difficulty is reduced, the cost is controlled, the reliability is high, and batch application is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, and more specifically, to an optical transceiver device based on front light monitoring. Background Art

[0002] Based on the rapid development of the optical communication industry, the requirements for optical modules and optical components are constantly increasing. With the development demand of high bandwidth and large capacity in data centers, the requirements for data transmission rate are also getting higher and higher. In the existing technology, vertical cavity surface emitting laser (VCSEL) is generally used as the light source, but in the actual application environment, the output of VCSEL is easily affected by various factors. Failure to monitor the VCSEL output in time may interfere with the transmission of high-speed signals. Therefore, it is necessary to monitor the light emission of VCSEL.

[0003] In the prior art, although there are optical modules for monitoring the light output of VCSEL, they are generally only concentrated in unidirectional optical modules, such as the splitter module with patent application number ZL 2023 2 2662085.7 and the mold for preparing the splitter module. For bidirectional optical modules, due to their miniaturization, there is no optical transceiver device with a reasonable layout and capable of realizing light output monitoring. Utility Model Content

[0004] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages which will be described below.

[0005] In order to achieve these purposes and other advantages of the utility model, an optical transceiver device based on front light monitoring is provided, comprising a housing with at least one optical port, a light-transmitting module arranged inside the housing, and further comprising:

[0006] At least one laser Vcsel used to construct an emission light path in cooperation with the light-transmitting module;

[0007] Cooperating with the light-transmitting module, at least one photodiode PD is used to construct a receiving light path, and the PD is arranged close to one side of the light port;

[0008] A photodetection diode MPD disposed between Vcsel and PD to implement front light detection;

[0009] The light-transmitting module is provided with a profiled surface I and a profiled surface II respectively matched with each Vcsel and each PD, and the angle formed by each free end surface of the profiled surface I and the profiled surface II is in the range of 135-225 degrees;

[0010] The special-shaped surface I is provided with a diaphragm I and a diaphragm II which respectively reflect the light emitted by each Vcsel to the corresponding light port and MPD;

[0011] The special-shaped surface II is provided with a filter for transmitting the light emitted by each Vcsel and reflecting the light transmitted from each optical port.

[0012] Preferably, the light-transmitting module is provided with lenses at positions matching with Vcsel, PD, MPD and the optical port.

[0013] Preferably, the irregular surface I and the irregular surface II are connected in space to construct the irregular cavity I;

[0014] The special-shaped surface II is provided with a transmission film at a position matching with the film piece I.

[0015] The utility model includes at least the following beneficial effects: by designing a transmission light path in the light-transmitting module, the light path transmission requirement can be achieved only through the light-transmitting module, thereby reducing the processing difficulty, controlling the cost, having high reliability, and realizing batch application.

[0016] Furthermore, the utility model completes the MPD front light monitoring function by controlling the relative angles of each diaphragm in the light-transmitting module, and determines the proportional relationship of the front light by controlling the angle relationship. The entire lens design can reduce the difficulty of processing, save costs, have high reliability, and meet the needs of high-speed network bandwidth and more system capacity, while facilitating functional integration in miniaturized devices.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a structure of a bidirectional transmission system constructed by using an optical transceiver device based on front light monitoring in one embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the patch positions of VCSEL, MPD and PD in one embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the optical transceiver device of Solution 1 of the utility model;

[0021] Figure 4 This is a schematic diagram of the optical path of the first solution of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the optical transceiver device of the second solution of the utility model;

[0023] Figure 6 This is a schematic diagram of the optical path of the second solution of the utility model. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0025] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0026] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "Ⅰ" and "Ⅱ" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0028] In addition, in the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In such Figure 3-4 In the first solution, the optical transceiver device based on front light monitoring includes a housing 1 with at least one optical port 4, a light-transmitting module 2 arranged inside the housing, and further includes:

[0030] At least one laser Vcsel 3 used to construct an emission light path in cooperation with the light-transmitting module 2;

[0031] Cooperating with the light-transmitting module 2, at least one photodiode PD 5 is used to construct a receiving light path, and the PD 5 is arranged close to one side of the light port 4;

[0032] A photodetection diode MPD 6 disposed between Vcsel and PD to achieve front light detection;

[0033] The light-transmitting module 2 is provided with a profiled surface II and a profiled surface II respectively matched with each Vcsel 3 and each PD 5. The angle formed by each free end surface of the profiled surface II and the profiled surface II is in the range of 180-225 degrees. This structural layout can limit the position of the MPD 6 and the filter 9 by the angle size and the inclination layout, which is convenient for controlling the size of the device. At the same time, the position angle of the diaphragm I7 and the diaphragm II8 can also be limited by the angle size of the profiled surface II and the profiled surface II.

[0034] The shaped surface II is provided with a diaphragm I7 and a diaphragm II8 for reflecting the light emitted by each Vcsel 3 to the corresponding optical port 4 and MPD 6 respectively. The angle between the diaphragms I7 and II8 in space can be limited by the angles inherent in the structures of the shaped surface II and the shaped surface II. The angle between the diaphragms I7 and II8 can determine whether the light in the TX optical path reaches the MPD 6 and the optical port 4 directly or reaches the MPD 6 after being reflected by the diaphragms I7 and II8.

[0035] The special-shaped surface II is provided with a filter 9 for transmitting the light emitted by each Vcsel 3 and reflecting the light transmitted from each optical port 4. The filter 9 is provided with a diaphragm V10 and a diaphragm VI11. In actual application, the emission light of different wavelengths generated by Vcsel 3 can be transmitted to the position of the optical port through the diaphragm V10 and the diaphragm VI11, and the diaphragm VI11 can reflect the light transmitted from the optical port 4 to the PD 5, thereby realizing the construction of the emission optical path and the receiving optical path.

[0036] Working principle: In the emission light path, the divergent light emitted by Vcsel 3 becomes parallel light after passing through the collimating lens Ⅰ12. A large part of the light reaches the diaphragm Ⅰ7, and another small part reaches the diaphragm Ⅱ8;

[0037] The light passing through the diaphragm II 8 is directly reflected by the lens II 13 and then reaches the surface of the MPD 6 for photoelectric conversion, thus achieving real-time monitoring of the light output of Vcsel 3.

[0038] When the light emitted by Vcsel 3 reaches the membrane Ⅰ7, it is reflected by the membrane Ⅰ7 and transmitted through the transmission film 14 in the air, and then reaches the filter 9. The light at the emission (TX) end can pass through both sides of the membrane Ⅴ 10 and the membrane Ⅵ 11 on the filter 9, and finally reaches the lens Ⅲ 15 for parallel light convergence and enters the optical fiber for transmission.

[0039] In the receiving optical path, the light transmitted by the optical fiber passes through the optical port 4 and the lens III 15 to reach the filter 9. The light at the receiving (RX) end can only be reflected on the diaphragm VI 11 and cannot pass through the diaphragm VI 11 to reach the diaphragm V 10. The light reflected by the diaphragm VI 11 reaches the PD 5 through the lens V 16 to complete the reception of the light.

[0040] In practical applications, the special-shaped surface I and the special-shaped surface II can be connected in space to construct the special-shaped cavity I15, or they can be arranged in different cavities respectively.

[0041] Based on the application of COB BIDI, this solution proposes a COB BIDI solution with front light monitoring. A light-transmitting module can simultaneously meet the needs of TX and RX optical paths. In addition, by adjusting the angle relationship of each diaphragm in the light-transmitting module, the monitoring and feedback of the output light power in the TX optical path can be realized, and the optical power loss problem in the coupling process can be analyzed.

[0042] Furthermore, based on traditional short-distance high-speed devices, this solution can not only meet the demand for transmission bandwidth and save optical fiber resources, but also reduce the cost of data centers and devices, and realize the demand for higher-speed network bandwidth and more system capacity.

[0043] In such Figure 5-6 In the second scheme, if the angle between diaphragm I7 and diaphragm II8 is small, that is, the angle formed by the free end faces of the special-shaped surfaces II and II is in the range of 135-180 degrees, then the light in the TX optical path directly reaches the MPD 6 after being reflected by diaphragm I7, and the light in the TX optical path directly reaches the position of the light port after being reflected by diaphragm II8. That is, relative to the first scheme, the arrival positions of diaphragms I7 and II8 are exchanged through angle design.

[0044] Furthermore, the position of the tip at the angle between diaphragm I7 and diaphragm II8 can determine the proportional relationship between the light intensity reaching MPD6 and the light port 4 in the TX optical path, that is, the more the tip is biased toward the MPD 6, the smaller the proportion of the light intensity reaching the MPD.

[0045] Working principle: In the emission light path, the divergent light emitted by Vcsel 3 becomes parallel light after passing through the collimating lens Ⅰ12. A large part of the light reaches the diaphragm Ⅱ8, and another small part reaches the diaphragm Ⅰ7;

[0046] The light passing through the diaphragm Ⅰ7 is directly reflected by the lens Ⅱ13, and then reaches the surface of MPD 6 for photoelectric conversion, realizing real-time monitoring of the light output of Vcsel 3;

[0047] When the light emitted by Vcsel 3 reaches the membrane II 8, it is reflected by the membrane I7 and transmits through the transmission film 14 in the air, and then reaches the filter 9. The light at the emission (TX) end can pass through both the membrane V 10 and the membrane VI 11 on the filter 9, and finally reaches the lens III 15 for parallel light convergence and enters the optical fiber for transmission.

[0048] In the receiving optical path, the light transmitted by the optical fiber passes through the optical port 4 and the lens III 15 to reach the filter 9. The light at the receiving (RX) end can only be reflected on the diaphragm VI 11 and cannot pass through the diaphragm VI 11 to reach the diaphragm V 10. The light reflected by the diaphragm VI 11 reaches the PD 5 through the lens V 16 to complete the reception of the light.

[0049] Scheme 1 and Scheme 2 are determined by the angle between diaphragm I7 and diaphragm II8, and the angle relationship between the two can determine the beam propagation direction of the TX front optical path and the proportional relationship of the beam intensity, while the RX optical path structure is consistent.

[0050] Example

[0051] The MT-MT / MT-Jumper (coupled optical fiber) solution is used to realize the connection between the internal signal of the optical transceiver device based on front light monitoring and the external signal of the module; in this solution, MT-MT / MT-Jumper adopts multiple optical fibers for connection, and realizes the bidirectional transmission of signals of different wavelengths in one optical fiber; further, two filters with different transmission and reflection wavelengths are used to realize the transmission of TX and RX signals in a single optical fiber, and further, MPD 6 is added to the optical path to monitor the light output of Vcsel 3 in real time. Compared with the prior art, this solution can realize the bidirectional transmission of signals in one optical fiber in the emission and reception of two different direction wavelengths, which greatly saves optical fiber resources. In specific applications, according to actual conditions, the laser Vcsel3, the photodetection diode MPD 6, and the photodiode PD 5 are respectively provided with two groups, the filter 9 has two corresponding pieces, and the positions of the patches of the two groups are as follows: Figure 2 As shown, interfaces No. 1, 2, 3, and 4 are Vcsel 3, interfaces No. 1′, 2′, 3′, and 4′ are MPD 6, interfaces No. 5, 6, 7, and 8 are all PD 5, and the position of each filter 9 corresponds to the spatial position of the corresponding laser Vcsel 3 and PD 5 in space. In actual application, one of the filters corresponds to one wavelength, and the other filter 2 corresponds to another wavelength. The two wavelengths are different, so the film structures of the two filters are also different.

[0052] PD 5 is located at one end of the filter close to the optical port 4 to improve the coupling responsivity at the RX end, while Vcsel3 and MPD 6 are located at the other end of the filter to achieve bidirectional transmission and monitoring of signals.

[0053] The present invention realizes the design of a multi-channel single-fiber bidirectional high-speed optical device through a light-transmitting module, and completes the MPD front light monitoring function by controlling the relative angles of each membrane in the light-transmitting module. The proportional relationship between the front light and the forward light and the optical path transmission structure are determined by controlling the angle relationship according to the specific application. The RX optical path is closer to the optical port than the TX optical path, which can improve the RX receiving responsiveness, and a multi-channel BIDI transmission scheme is realized by two filters with different membrane layer structures. The entire lens design can reduce the difficulty of processing, save costs, and has high reliability, thereby meeting the needs of high-speed network bandwidth and more system capacity.

[0054] The above solutions are only an illustration of a preferred example, but are not limited thereto. When implementing the present utility model, appropriate replacement and / or modification can be performed according to user needs.

[0055] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0056] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. An optical transceiver device based on front light monitoring, comprising a housing with at least one optical port and a light-transmitting module arranged inside the housing, characterized in that: Also includes: Cooperate with the light-transmitting module. At least one laser Vcsel used to construct an emission light path in cooperation with the light-transmitting module; Cooperating with the light-transmitting module, at least one photodiode PD is used to construct a receiving light path, and the PD is arranged close to one side of the light port; A photodetection diode MPD disposed between Vcsel and PD to implement front light detection; The light-transmitting module is provided with a profiled surface I and a profiled surface II respectively matched with each Vcsel and each PD, and the angle formed by each free end surface of the profiled surface I and the profiled surface II is in the range of 135-225 degrees; The special-shaped surface I is provided with a diaphragm I and a diaphragm II which respectively reflect the light emitted by each Vcsel to the corresponding light port and MPD; The special-shaped surface II is provided with a filter for transmitting the light emitted by each Vcsel and reflecting the light transmitted from each optical port.

2. The optical transceiver device based on front light monitoring as claimed in claim 1, characterized in that: The light-transmitting module is provided with lenses at positions matching with Vcsel, PD, MPD and the optical port.

3. The optical transceiver device based on front light monitoring as claimed in claim 1, characterized in that: The special-shaped surface I and the special-shaped surface II are connected in space to construct the special-shaped cavity I; The special-shaped surface II is provided with a transmission film at a position matching with the film piece I.

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