Single-interface multi-wavelength two-way transmission assembly for optical module

Abstract

The utility model provides a single-interface multi-wavelength bidirectional transmission assembly for an optical module. The single-interface multi-wavelength bidirectional transmission assembly comprises a collimator, a beam splitter prism, a reflecting prism, a wedge-shaped rectangular prism, a PCBA board, a wave combining layer and a wave splitting layer. Wherein the wave division layer comprises a first wavelength division multiplexing component; the wave combining layer comprises a second wavelength division multiplexing assembly and an isolator; a light emitting device and a light receiving device are arranged on the PCBA board; an optical signal input from a collimator reaches a wave division layer through a beam splitter prism, multiple paths of parallel optical signals with different wavelengths are output after the optical signal passes through a first wavelength division multiplexing assembly, and the parallel optical signals are deflected by a wedge-shaped right-angle prism and are received by an optical receiving device; multiple paths of parallel light signals with different wavelengths emitted by the light emitting device are deflected by the wedge-shaped rectangular prism, enter the wave combining layer, are combined into one path of light signals through the second wavelength division multiplexing assembly, and then enter the reflecting prism through the isolator, and the reflected light signals reach the collimator through the beam splitter prism to be output, so that the receiving and the transmitting are in the same interface, broadband resources are saved, and the transmission efficiency is improved. And the optical module is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical communication technical field, concretely relates to a single interface multi -wavelength bidirectional transmission assembly for optical module. BACKGROUND

[0002] With the increase of optical communication network data demand, the transmission capacity and integration of optical module are required more and more high. The conventional optical module usually adopts double fiber bidirectional transmission mode, and one interface is used to transmit optical emission signal, and one interface is used to transmit optical receiving signal, which not only increases the size and complexity of optical module, but also occupies optical cable resources and increases cost.

[0003] Therefore, the problems in the prior art include:

[0004] 1. The prior art mostly adopts double-interface transmission mode, and the module is large and complex.

[0005] 2. In the prior art, the combining and separating components are mostly separated as independent parts, which increases the volume of the components and occupies a large space.

[0006] In order to meet the market demand for high-capacity, small-size and low-cost optical modules, the present application designs an optical component capable of realizing single-interface multi-wavelength bidirectional transmission for optical signal transmission in the optical module. Utility model content

[0007] The utility model provides a single interface multi -wavelength bidirectional transmission assembly for optical module, including collimator, light splitting prism, reflection prism, wedge right angle prism, PCBA board, combing layer and wave layer, wherein: the wave layer includes first wave division multiplexing component, the combing layer includes second wave division multiplexing component and isolator, and PCBA board is provided with optical emission device and optical receiver,

[0008] The light signal from the collimator is input, passes through the light splitting prism to the wave layer, and outputs multiple different wavelength parallel light signals after the first wave division multiplexing component, and the parallel light signals are deflected by the wedge right angle prism and received by the optical receiver.

[0009] Multiple different wavelength parallel light signals emitted from the optical emission device are deflected by the wedge right angle prism and enter the combing layer, are combined into a light signal by the second wave division multiplexing component, and the combined light signal enters the reflection prism through the isolator, and the reflected light signal passes through the light splitting prism and reaches the collimator output.

[0010] Further, the single-interface multi-wavelength bidirectional transmission assembly for the optical module further comprises a bottom plate, the light splitting prism, the first wavelength division multiplexing assembly and the wedge-shaped right-angle prism are arranged on the bottom plate, and the PCBA plate is arranged below the bottom plate.

[0011] Further, the bottom plate is provided with an open hole support plate and a non-open hole support plate, the reflecting prism is arranged on the open hole support plate, and the second wavelength division multiplexing assembly and the isolator are arranged on the non-open hole support plate.

[0012] Further, the reflecting prism is specifically a right-angle prism or a parallel quadrilateral prism.

[0013] Further, the first wavelength division multiplexing assembly and the second wavelength division multiplexing assembly are Z-block structures combined by a substrate and a filter sheet.

[0014] Further, the light splitting prism is specifically a three-dimensional polarization light splitting prism or a parallel quadrilateral prism.

[0015] Further, the light emitting device adopts an array LD chip, and the light receiving device adopts an array PD chip.

[0016] Further, the light emitting device and the multi-path output of the second wavelength division multiplexing assembly are arranged in one-to-one correspondence, and the light receiving device and the multi-path output of the first wavelength division multiplexing assembly are arranged in one-to-one correspondence.

[0017] Further, the bottom plate is provided with an open hole area, the open hole area is located between the first wavelength division multiplexing assembly and the wedge-shaped right-angle prism, and the light emitting device and the light receiving device are located below the open hole area.

[0018] Further, the single-interface multi-wavelength bidirectional transmission assembly for the optical module is fixed by an adhesive, and the adhesive is specifically UV glue.

[0019] The single-interface multi-wavelength bidirectional transmission assembly for the optical module has the advantages that:

[0020] 1. Through optical path design, optical signal transmission is input by a collimator, is received by a light receiving assembly, is emitted by a light emitting assembly, and is output to the collimator, so that the same interface is used for receiving and transmitting, broadband resources are saved, and the module is more convenient.

[0021] 2. The wavelength division multiplexing assembly is used to realize the functions of combining and separating waves, the combining and separating wave assemblies are integrated together, the volume of passive components in the optical module is reduced, installation is facilitated, and space is saved. DRAWINGS

[0022] Figure 1 It is a structural schematic view of the bidirectional transmission assembly of the utility model;

[0023] Fig. 2 (a) is a main view of the optical signal transmission path of the bidirectional transmission assembly of the utility model;

[0024] Fig. 2 (b) is a plan view of the optical signal transmission path of the bidirectional transmission assembly of the utility model;

[0025] Figure 3 It is an assembly schematic view of the bidirectional transmission assembly of the utility model;

[0026] Figure 4 It is a light transmission path view of the bidirectional transmission assembly of the utility model using a parallelogram prism to replace a light splitting prism and a right-angle prism.

[0027] In the figure: 1-bottom plate, 2-hole support flat plate, 3-non-hole support flat plate, 4-collimator, 5-light splitting prism, 6-first wavelength division multiplexing assembly, 7-reflecting prism, 8-isolator, 9-second wavelength division multiplexing assembly, 10-wedge-shaped right-angle prism, 11-PCBA board, 12-optical transmitter, 13-optical receiver. DETAILED DESCRIPTION

[0028] In order to better understand and illustrate the utility model, the utility model is further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model.

[0029] Example 1

[0030] The utility model includes bottom plate 1, hole support flat plate 2, non-hole support flat plate 3, collimator 4, light splitting prism 5, reflecting prism 7, wedge-shaped right-angle prism 10, PCBA board 11, wave combining layer and wave splitting layer, and optical transmitter 12 and optical receiver 13 are arranged on PCBA board 11.

[0031] Among them: the wave splitting layer includes first wavelength division multiplexing assembly 6, and the wave combining layer includes second wavelength division multiplexing assembly 9 and isolator 8.

[0032] The principle of the light splitting prism 5 is to split the incident light into two different light beams at a specified ratio, and the utility model adopts a three-dimensional polarization light splitting prism to split the incident light into two light signals perpendicular to each other in the propagation direction.

[0033] In the utility model, the first wavelength division multiplexing assembly 6 and the second wavelength division multiplexing assembly 9 are Z-block structures combined by a substrate and a filter sheet, and have wave combining and splitting functions.

[0034] The first wavelength division multiplexing component 6 of the wave division layer is arranged on the bottom plate 1, an input light signal is input into the first wavelength division multiplexing component 6 through the collimator 4, the relative position and angle of the collimator 4 and the first wavelength division multiplexing component 6 are adjusted by using the adjusting frame, the light signal is parallel output after passing through the first wavelength division multiplexing component 6, and the collimator 4 and the first wavelength division multiplexing component 6 are fixedly bonded on the bottom plate 1 after adjustment.

[0035] The light splitting prism 5 is arranged between the collimator 4 and the first wavelength division multiplexing component 6, the reflecting prism 7 is arranged on the opening support plate 2, the second wavelength division multiplexing component 9 is arranged on the non-opening support plate 3, an input light signal is input into the light splitting prism 5 through the collimator 4, the positions of the light splitting prism 5 and the reflecting prism 7 are adjusted by using the adjusting frame, the input light signal is divided into two beams, one of which is parallel output into the first wavelength division multiplexing component 6, and the other of which is deflected by 90° after passing through the reflecting prism 7 and is deflected into parallel light again, and the output light is confirmed to be parallel light by using the photosensitive card; the position of the second wavelength division multiplexing component 9 is adjusted by using the adjusting frame, the light signal is parallel output after passing through the second wavelength division multiplexing component 9, and the light splitting prism 5, the reflecting prism 7 and the second wavelength division multiplexing component 9 are fixedly bonded after adjustment.

[0036] The isolator 8 is arranged in front of the second wavelength division multiplexing component 9, the second wavelength division multiplexing component 9 reversely inputs a light signal, the light signal passes through the center area of the light transmission hole of the isolator 8 after passing through the second wavelength division multiplexing component 9, is deflected into the collimator 4 through the reflecting prism 7 and the light splitting prism 5, and the position of the isolator 8 is adjusted by using the adjusting frame to minimize the light signal loss, and the isolator 8 is fixedly bonded after adjustment.

[0037] The wedge-shaped right-angle prism 10 is arranged behind the opening area of the bottom plate 1, and the parallel light signals output by the first wavelength division multiplexing component 6 and the second wavelength division multiplexing component 9 are deflected by 90°, and the parallel light output vertically after deflection finally enters the light receiving device 13 on the PCBA board through the opening area of the bottom plate 1.

[0038] The bottom plate 1 with the bonded components is installed on the optical module PCBA board 11, and the position of the bottom plate 1 is adjusted so that the light emitting device 12 and the light receiving device 13 are directly below the opening area of the bottom plate 1.

[0039] The light signal input from the collimator 4 passes through the light splitting prism 5 to the wave division layer, and the parallel light signals of multiple different wavelengths are output after passing through the first wavelength division multiplexing component 6 of the wave division layer, and the parallel light signals are deflected by the wedge-shaped right-angle prism 10 and received by the light receiving device 13;

[0040] Multiple parallel light signals of different wavelengths emitted from the light emitting device 12 are deflected by the wedge-shaped right-angle prism 10 and enter the multiplexing layer. After passing through the second wavelength division multiplexing component 9 of the multiplexing layer, they are combined into one light signal. The combined light signal passes through the isolator 8 and enters the reflecting prism 7. The reflected light signal then passes through the beam splitter prism 5 and reaches the collimator 4 for output.

[0041] Example 2

[0042] like Figure 1 As shown, this utility model includes a base plate 1, a perforated support plate 2, a non-perforated support plate 3, a collimator 4, a beam splitter prism 5, a reflecting prism 7, a wedge-shaped right-angle prism 10, a PCBA board 11, a first wavelength division multiplexing (WDM) assembly 6, a second WDM assembly 9, and an isolator 8. The PCBA board 11 is equipped with a light emitting device 12 and a light receiving device 13. In this embodiment, the light emitting device 12 is an array LD chip; the light receiving device 13 is an array PD chip; the base plate 1 is a glass base plate with a perforated area; the perforated support plate 2 is a perforated support glass plate; the non-perforated support plate 3 is a non-perforated support glass plate; and the reflecting prism 7 is a right-angle prism. Figure 3 The diagram shown is an assembly schematic of Embodiment 2 of this utility model.

[0043] The first wavelength division multiplexing (WDM) component 6 is placed on the base plate 1. An optical signal is input, and the optical signal is input into the first WDM component 6 through the collimator 4. The relative position and angle of the collimator 4 and the first WDM component 6 are adjusted using the adjustment bracket so that the optical signal outputs four wavelength signals in parallel after passing through the first WDM component 6. After the adjustment is completed, the collimator 4 and the first WDM component 6 are glued and fixed on the base plate 1.

[0044] The beam splitter prism 5 is positioned between the collimator 4 and the first wavelength division multiplexing (WDM) component 6. The reflecting prism 7 is placed on the perforated support plate 2, and the second WDM component 9 is placed on the non-perforated support plate 3. An input optical signal is passed through the collimator 4 and input into the beam splitter prism 5. The positions of the beam splitter prism 5 and the reflecting prism 7 are adjusted using an adjustment bracket to split the input optical signal into two beams. One beam is output in parallel into the first WDM component 6, and the other beam is deflected by 90°, passes through the upper reflecting prism 7, and is then deflected into parallel light. A photosensitive card is used to confirm that the output light is parallel. The position of the second WDM component 9 is then adjusted using an adjustment bracket so that the optical signal outputs four wavelength signals in parallel after passing through the second WDM component 9. After adjustment, the beam splitter prism 5, the reflecting prism 7, and the second WDM component 9 are bonded and fixed together.

[0045] Isolator 8 is placed in front of second wavelength division multiplexing assembly 9, second wavelength division multiplexing assembly 9 reversely inputs optical signals, after the optical signals pass through second wavelength division multiplexing assembly 9, the optical signals pass through the center area of the light transmission hole of isolator 8, are deflected by reflecting prism 7 and light splitting prism 5, are input into collimator 4, and the position of isolator 8 is adjusted by adjusting frame to minimize the loss of optical signals, and after the adjustment is completed, isolator 8 is fixed by bonding.

[0046] After the opening area of bottom plate 1, wedge-shaped right-angle prism 10 is placed to turn the parallel optical signals output by first wavelength division multiplexing assembly 6 and second wavelength division multiplexing assembly 9 by 90 degrees, and the vertical output parallel light after deflection finally enters optical receiving device 13 on PCBA board through the opening area of bottom plate 1.

[0047] Bottom plate 1 with components bonded is installed on optical module PCBA board 11, and the position of bottom plate 1 is adjusted so that optical transmitting device 12 and optical receiving device 13 are directly below the opening area of bottom plate 1.

[0048] Fig. 2 (a) and Fig. 2 (b) show the transmission path of optical signals of the utility model, wherein Fig. 2 (a) is a front view of the optical signal transmission path, and Fig. 2 (b) is a top view of the optical signal transmission path. As shown in Fig. 2 (a) and Fig. 2 (b), the optical signals are input from collimator 4, pass through light splitting prism 5 to first wavelength division multiplexing assembly 6, output multiple parallel optical signals of different wavelengths after passing through first wavelength division multiplexing assembly 6, and the parallel optical signals are deflected by wedge-shaped right-angle prism 10 and received by optical receiving device 13;

[0049] The multiple parallel optical signals of different wavelengths emitted from optical transmitting device 12 are deflected by wedge-shaped right-angle prism 10, enter second wavelength division multiplexing assembly 9, are combined into one optical signal after passing through second wavelength division multiplexing assembly 9, the combined optical signal enters reflecting prism 7 through isolator 8, and the reflected optical signal passes through light splitting prism 5 and reaches collimator 4 to be output.

[0050] Embodiment 3

[0051] The utility model discloses a bottom plate 1, opening support flat plate 2, not opening support flat plate 3, collimator 4, light splitting prism 5, reflecting prism 7, wedge-shaped right-angle prism 10, PCBA board 11, first wavelength division multiplexing assembly 6, second wavelength division multiplexing assembly 9 and isolator 8, and PCBA board 11 is provided with optical transmitting device 12 and optical receiving device 13;In the embodiment, the optical transmitting device 12 adopts array LD chip;The optical receiving device 13 adopts array PD chip;The bottom plate 1 adopts glass bottom plate and is equipped with opening area;The opening support flat plate 2 adopts opening support glass flat plate;The not opening support flat plate 3 adopts not opening support glass flat plate;Reflecting prism 7 adopts right-angle prism.

[0052] The first wavelength division multiplexing component 6 is arranged on the bottom plate 1, an input light signal is input into the first wavelength division multiplexing component 6 through the collimator 4, the relative position and angle of the collimator 4 and the first wavelength division multiplexing component 6 are adjusted by using the adjusting frame, the light signal is parallel output after passing through the first wavelength division multiplexing component 6, and four wavelength signals are obtained, and the collimator 4 and the first wavelength division multiplexing component 6 are fixed and bonded on the bottom plate 1 after adjustment.

[0053] The light splitting prism 5 is arranged between the collimator 4 and the first wavelength division multiplexing component 6, the reflecting prism 7 is arranged on the opening support plate 2, the second wavelength division multiplexing component 9 is arranged on the non-opening support plate 3, an input light signal is input into the light splitting prism 5 through the collimator 4, the positions of the light splitting prism 5 and the reflecting prism 7 are adjusted by using the adjusting frame, the input light signal is split into two beams, one of which is parallel output into the first wavelength division multiplexing component 6, and the other of which is deflected by 90° after passing through the upper reflecting prism 7 and is deflected into parallel light again, and the output light is confirmed to be parallel light by using the photosensitive card; the position of the second wavelength division multiplexing component 9 is adjusted by using the adjusting frame, and four wavelength signals are parallel output after the light signal passes through the second wavelength division multiplexing component 9, and the light splitting prism 5, the reflecting prism 7 and the second wavelength division multiplexing component 9 are fixed and bonded after adjustment.

[0054] The isolator 8 is arranged in front of the first wavelength division multiplexing component 6, the first wavelength division multiplexing component 6 reversely inputs a light signal, the light signal passes through the center area of the light transmission hole of the isolator 8 after passing through the first wavelength division multiplexing component 6, is input into the collimator 4 through the light splitting prism 5, and the position of the isolator 8 is adjusted by using the adjusting frame to minimize the light signal loss, and the isolator 8 is fixed and bonded after adjustment.

[0055] The wedge-shaped right-angle prism 10 is arranged behind the opening area of the bottom plate 1, and the parallel light signals output by the first wavelength division multiplexing component 6 and the second wavelength division multiplexing component 9 are deflected by 90°, and the parallel light output vertically after deflection finally enters the light receiving device 13 on the PCBA board through the opening area of the bottom plate 1.

[0056] The bottom plate 1 with the bonded components is installed on the optical module PCBA board 11, and the position of the bottom plate 1 is adjusted so that the light emitting device 12 and the light receiving device 13 are directly below the opening area of the bottom plate 1.

[0057] An input light signal is input from the collimator 4, the light signal reaches the second wavelength division multiplexing component 9 after being deflected by the light splitting prism 5 and the reflecting prism 7, and multiple parallel light signals of different wavelengths are output after passing through the second wavelength division multiplexing component 9, and the parallel light signals are received by the light receiving device 13 after being deflected by the wedge-shaped right-angle prism 10;

[0058] The parallel light signals of different wavelengths emitted from the light emitting device 12 are deflected into the first wavelength division multiplexing component 6 through the wedge-shaped right-angle prism 10, combined into one light signal through the first wavelength division multiplexing component 6, and then output from the collimator 4 after passing through the isolator 8 and the beam splitter 5.

[0059] In the preferred embodiment of the utility model, as shown in Figure 4 The beam splitter 5 and the reflecting prism 7 can be replaced by parallelogram prisms to realize the functions of light splitting and deflection.

[0060] In the preferred embodiment of the utility model, the height difference between the first wavelength division multiplexing component 6 and the second wavelength division multiplexing component 9 can be determined by adjusting the height of the supporting plate according to the actual spatial layout requirements of the optical module, so as to ensure that the spacing between the array light emitting device and the light receiving device meets the use requirements.

[0061] In the preferred embodiment of the utility model, a focusing lens can be added in the optical path to reduce the loss in the light signal transmission path.

[0062] In the above embodiment, the components of the single-interface multi-wavelength bidirectional transmission component of the optical module are fixed by adhesive.

[0063] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall fall within the protection scope of the appended claims of the utility model.

Claims

1. A single interface multi-wavelength bidirectional transmission assembly for an optical module, characterized by, It comprises a collimator (4), a light splitting prism (5), a reflecting prism (7), a wedge-shaped right-angle prism (10), a PCBA board (11), a wave combining layer and a wave splitting layer; wherein: the wave splitting layer comprises a first wavelength division multiplexing component (6); the wave combining layer comprises a second wavelength division multiplexing component (9) and an isolator (8); the PCBA board (11) is provided with a light emitting device (12) and a light receiving device (13); The light signal input from the collimator (4) reaches the wave splitting layer through the light splitting prism (5), and after passing through the first wavelength division multiplexing component (6), a plurality of parallel light signals of different wavelengths are output, which are deflected by the wedge-shaped right-angle prism (10) and received by the light receiving device (13); A plurality of parallel light signals of different wavelengths emitted from the light emitting device (12) are deflected by the wedge-shaped right-angle prism (10) and enter the wave combining layer, and after passing through the second wavelength division multiplexing component (9), they are combined into one light signal, which enters the reflecting prism (7) through the isolator (8), and the reflected light signal reaches the collimator (4) after passing through the light splitting prism (5) and is output.

2. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein It also comprises a bottom plate (1), and the light splitting prism (5), the first wavelength division multiplexing component (6) and the wedge-shaped right-angle prism (10) are arranged on the bottom plate (1); the PCBA board (11) is arranged below the bottom plate (1).

3. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 2, wherein The bottom plate (1) is provided with an open hole support flat plate (2) and a non-open hole support flat plate (3); the reflecting prism (7) is arranged on the open hole support flat plate (2); and the second wavelength division multiplexing component (9) and the isolator (8) are arranged on the non-open hole support flat plate (3).

4. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein The reflecting prism (7) is specifically a right-angle prism or a parallel quadrilateral prism.

5. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein The first wavelength division multiplexing component (6) and the second wavelength division multiplexing component (9) are Z-block structures composed of a substrate and a filter sheet.

6. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein The light splitting prism (5) is specifically a three-dimensional polarization light splitting prism or a parallel quadrilateral prism.

7. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein The light emitting device (12) adopts an array LD chip; and the light receiving device (13) adopts an array PD chip.

8. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein The light emitting device (12) and the second wavelength division multiplexing component (9) are arranged in one-to-one correspondence with the multiple outputs; and the light receiving device (13) and the first wavelength division multiplexing component (6) are arranged in one-to-one correspondence with the multiple outputs.

9. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 2, wherein The bottom plate (1) is provided with an open hole area between the first wavelength division multiplexing component (6) and the wedge-shaped right-angle prism (10), and the light emitting device (12) and the light receiving device (13) are located below the open hole area.

10. The single interface multi-wavelength bidirectional transmission assembly for an optical module according to claim 1, wherein The components of the single-interface multi-wavelength bidirectional transmission assembly of the optical module are all fixed by an adhesive; and the adhesive is specifically UV glue.

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