Single fiber bidirectional optical transceiver module

Abstract

The application discloses a single-fiber bidirectional optical transceiver module, wherein internal optical ports, a circulator assembly and an optical receiving assembly are sequentially arranged from left to right, an optical transmitting assembly is at least partially arranged in front of the optical receiving assembly, the single-fiber bidirectional optical transceiver module further comprises an optical guiding assembly, and the circulator assembly is at least partially arranged behind at least part of the optical guiding assembly; the optical transmitting assembly emits transmitting light to the left, the optical guiding assembly is used for guiding the transmitting light to enter the circulator assembly, and at least part of the transmitting light propagates to the right rear during the propagation process in the optical guiding assembly. Through the re-design of the structure of the single-fiber bidirectional optical transceiver module and the positional relationship of the internal structure, the space utilization of the positions of the optical transmitting assembly and the optical receiving assembly is improved, more components can be integrated on the circuit board, and thus the integration of the single-fiber bidirectional optical transceiver module is improved.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication technology, and in particular to a single-fiber bidirectional optical transceiver module. Background Technology

[0002] A single-fiber bidirectional optical transceiver module enables bidirectional transmission over a single optical fiber, separating the forward and reverse optical signals within the same fiber to achieve both transmission and reception. It is a crucial component of any optical module. A typical single-fiber bidirectional optical transceiver module includes a roughly rectangular housing, and optical transmitting and receiving components housed within the housing. Common single-fiber bidirectional optical transceiver modules typically include a housing, optical transmitting and receiving components housed within the housing, and a circuit board. The optical transmitting and receiving components are as follows: Figure 1 As shown, it includes a light emitting component 10 and a light receiving component 30 arranged side by side. Since the light emitting component 10 also includes a laser component 12, the components of the light emitting component 10 are more numerous than those of the light receiving component 30, which makes the length of the light emitting and receiving components longer. On the one hand, the light emitting and receiving components waste space and restrict the size of the circuit board. On the other hand, it is not conducive to improving the integration of the single-fiber bidirectional optical transceiver module. Summary of the Invention

[0003] To address the problems in the prior art, the present invention aims to provide a single-fiber bidirectional optical transceiver module with higher integration.

[0004] To achieve the above-mentioned objective, one embodiment of the present invention provides a single-fiber bidirectional optical transceiver module, including a carrier board, and an optical port, an optical transmitting component, an optical receiving component, and a circulator component fixed on the carrier board. The optical port, the circulator component, and the optical receiving component are arranged sequentially from left to right. The optical transmitting component is arranged side by side with the circulator component and the optical receiving component in the front-back direction. At least a portion of the optical transmitting component is structurally located in front of the left of the optical receiving component. The single-fiber bidirectional optical transceiver module also includes an optical guiding component, which is partially located to the left of the optical transmitting component and partially located between the optical transmitting component and the circulator component.

[0005] The light emitting component emits light to the left, and the light guiding component guides the emitted light into the circulator component. The emitted light propagates to the right and rear during at least a portion of its propagation through the light guiding component.

[0006] As a further improvement of the present invention, the light guiding component includes a reflecting prism that guides the emitted light emitted by the light emitting component to the circulator component by reflection.

[0007] As a further improvement of the present invention, the reflecting prism includes a first reflecting prism and a second reflecting prism. The first reflecting prism is disposed on the left side of the light emitting component, and the second reflecting prism is disposed in front of the circulator component. The first reflecting prism reflects the emitted light emitted by the light emitting component to the second reflecting prism, and the second reflecting prism reflects the reflected light received from the first reflecting prism into the light circulator component.

[0008] As a further improvement of the present invention, the light guiding component includes:

[0009] The first reflecting prism includes a first reflecting film surface and a second reflecting film surface;

[0010] The second reflecting prism is disposed to the right rear of the first reflecting prism, and the second reflecting prism includes a third reflecting film surface;

[0011] The emitted light from the light emitting component is reflected sequentially by the first reflective film and the second reflective film, and then directed toward the second reflective prism. After being reflected again by the third reflective film, the emitted light enters the circulator component.

[0012] As a further improvement of the present invention, the circulator assembly includes a fourth reflective film surface, wherein the emitted light is reflected by the third reflective film surface to the fourth reflective film surface, and then reflected by the fourth reflective film surface before being emitted to the left.

[0013] As a further improvement of the present invention, the first reflective film surface is arranged in parallel with the third reflective film surface, and the second reflective film surface is arranged in parallel with the fourth reflective film surface.

[0014] As a further improvement of the present invention, the included angle between the first reflective film surface and the second reflective film surface is 90°, and the included angle between the third reflective film surface and the fourth reflective film surface is 90°.

[0015] As a further improvement of the present invention, the circulator assembly further includes a circulator, an incident prism, and a prism group. The emitted light emitted from the second reflecting prism passes sequentially through the incident prism, the circulator, and the prism group before entering the optical port.

[0016] The incident light emitted from the optical port passes sequentially through the prism group, the circulator, and the incident prism before entering the light receiving component.

[0017] As a further improvement of the present invention, in the left-right direction, the circulator is flush with a portion of the structure of the light emitting component.

[0018] As a further improvement of the present invention, the second reflecting prism includes the third reflecting film surface, the incident prism includes the fourth reflecting film surface, a first beam splitting film is disposed between the second reflecting prism and the incident prism, and the second reflecting prism and the incident prism are abutted on both sides of the first beam splitting film.

[0019] The emitted light is reflected by the third reflective film, passes through the first beam-splitting film, and is then reflected by the fourth reflective film before exiting to the left.

[0020] The horizontally polarized incident light in the incident light passes through the first beam splitter and exits to the right, while the vertically polarized incident light in the incident light is reflected by the fourth reflective film and then reflected by the first beam splitter before exiting to the right.

[0021] As a further improvement of the present invention, the light guiding component further includes an isolator and a first half-wave plate, wherein the first reflecting prism, the first half-wave plate, the isolator and the light emitting component are arranged sequentially from left to right.

[0022] As a further improvement of the present invention, the optical transmitting component includes a wavelength division multiplexer, the optical receiving component includes a wavelength demultiplexer and a photodetector, the wavelength division multiplexer is disposed to the left front of the wavelength demultiplexer, and the photodetector is disposed to the right of the wavelength demultiplexer.

[0023] As a further improvement of the present invention, the light emitting component further includes a laser component, the laser component including a substrate disposed on the carrier plate, and a plurality of lasers and collimating lenses disposed on the substrate;

[0024] The laser component is located to the right of the wavelength division multiplexer, and the light emitted by the laser enters the wavelength division multiplexer through the collimating lens;

[0025] In the left-right direction, the rightmost end of the laser component is aligned with the rightmost end of the wave demultiplexer.

[0026] As a further improvement of the present invention, the single-fiber bidirectional optical transceiver module further includes a circuit board fixed on the carrier plate, the circuit board being disposed on the right side of the optical emitting component and the optical receiving component.

[0027] Compared with commonly used technologies, the present invention has the following beneficial effects: by redesigning the structure of the single-fiber bidirectional optical transceiver module and the positional relationship of the internal structure, the space utilization of the optical transmitting component and the optical receiving component is improved, so that the circuit board can be longer and more components can be integrated, thereby improving the integration of the single-fiber bidirectional optical transceiver module. Attached Figure Description

[0028] Figure 1This is a schematic diagram of a portion of the structure of a commonly used single-fiber bidirectional optical transceiver module;

[0029] Figure 2 This is a schematic diagram of a partial structure of a single-fiber bidirectional optical transceiver module according to an embodiment of the present invention.

[0030] Figure 3 This is another structural schematic diagram of a portion of the structure of a single-fiber bidirectional optical transceiver module according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the emission optical path of a circulator assembly and an optical guiding assembly according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the emission optical path of a circulator assembly and an optical guiding assembly according to another embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the emission optical path of the circulator assembly and the optical guide assembly according to another embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the receiving optical path of a circulator assembly and an optical guiding assembly according to an embodiment of the present invention;

[0035] Among them, 100 is a single-fiber bidirectional optical transceiver module; 10 is an optical emitting component; 11 is a wavelength division multiplexer; 12 is a laser component; 121 is a laser; 122 is a collimating lens; 123 is a substrate; 20 is an optical receiving component; 21 is a wavelength division multiplexer; 30 is a circulator component; 31 is an incident prism; 311 is a fourth reflective film; 32 is a circulator; 321 is a Faraday rotator; 322 is a second half-wave plate; and 33 is a prism. Group; 331, translation prism; 332, first prism; 333, second beam splitter; 334, second prism; 40, light guiding assembly; 41, first reflecting prism; 411, first reflecting film surface; 412, second reflecting film surface; 42, second reflecting prism; 421, third reflecting film surface; 422, first beam splitter; 43, isolator; 44, first half-wave plate; 50, carrier plate; 60, optical port; 70, circuit board. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0037] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative position” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0038] One embodiment of the present invention provides a single-fiber bidirectional optical transceiver module 100 that enables higher integration, comprising a housing, an optical transmitting and receiving component housed within the housing, and a circuit board 70. The optical transmitting and receiving component is as follows: Figure 2 As shown, it includes a carrier board 50, and an optical port 60, an optical emitting assembly 10, an optical receiving assembly 20, a circulator assembly 30, and an optical guiding assembly 40 on the carrier board 50.

[0039] The single-fiber bidirectional optical transceiver module 100 is roughly rectangular in shape. An optical port 60 is provided at one end of the length of the cuboid, and an electrical port is provided at the other end. The optical port 60 is used to connect optical signal information transmission equipment such as optical fiber or optical waveguide, and the electrical port is used to connect information processing equipment such as optical network terminal (such as optical modem) or computer. The single-fiber bidirectional optical transceiver module 100 realizes the conversion of optical signal to electrical signal and / or electrical signal to optical signal.

[0040] To clearly express the positions and directions described in this embodiment, in this embodiment, left and right are defined according to the length direction of the cuboid-shaped single-fiber bidirectional optical transceiver module 100, where the optical port 60 is located at the leftmost end of the single-fiber bidirectional optical transceiver module 100, and the opposite direction is defined as right. On a plane perpendicular to the left and right directions, the optical emitting component 10 is located in front of the optical receiving component 20. The definitions of the left and right directions and the front and back directions can also be combined. Figure 3 The diagram shows a partial structure of the single-fiber bidirectional optical transceiver module 100. Additionally, on a plane perpendicular to the front, back, left, and right sides, the upper and lower sections can be defined respectively.

[0041] In addition, in this embodiment, when it is said that a certain component is located on the left side in another direction, the certain component and the other component can be offset from each other in the front-back direction and in the up-down direction. For example, when it is said that the light emitting component 10 is located in front of the light receiving component 20, at least a part of the structure of the light emitting component 10 can be located to the left of the light receiving component 20.

[0042] The optical port 60, circulator assembly 30, and optical receiver assembly 20 are arranged sequentially from left to right. The optical transmitter assembly 10 is arranged side by side with the circulator assembly 30 and optical receiver assembly 20 in the front-back direction. Here, the optical port 60, circulator assembly 30, and optical receiver assembly 20 can be staggered in the front-back direction, and the optical transmitter assembly 10, circulator assembly 30, and optical receiver assembly 20 can be staggered in the left-right direction.

[0043] The optical transmitting component 10 is at least partially located in front of the optical receiving component 20 on the left. The single-fiber bidirectional optical transceiver module 100 also includes an optical guiding component 40. The circulator component 30 is at least partially located behind at least part of the optical guiding component 40 on the right. Specifically, the optical guiding component 40 is partially located to the left of the optical transmitting component 10 and partially located between the optical transmitting component 10 and the circulator component 30. That is, a portion of the optical guiding component 40 is located to the left of the optical transmitting component 10, and a portion is located behind the optical transmitting component 10.

[0044] The light emitting component 10 emits light to the left, and the light guiding component 40 guides the emitted light into the circulator component 30. The emitted light propagates to the right and rear during at least a portion of its propagation through the light guiding component 40.

[0045] The light guiding component 40 of this embodiment includes a reflecting prism that guides the emitted light emitted by the light emitting component 10 to the circulator component 30 by reflection.

[0046] The reflecting prism includes a first reflecting prism 41 and a second reflecting prism 42. The first reflecting prism 41 is disposed to the left of the light emitting assembly 10, and the second reflecting prism 42 is disposed in front of the circulator assembly 30. The first reflecting prism 41 reflects the emitted light emitted by the light emitting assembly 10 to the second reflecting prism 42, and the second reflecting prism 42 reflects the reflected light received from the first reflecting prism 41 into the circulator assembly 30. Here, "the second reflecting prism 42 is disposed in front of the circulator assembly 30" means that at least a portion of the second reflecting prism 42 structure is located in front of the entire circulator assembly 30; the specific location can be as follows: Figure 3 As shown.

[0047] The first reflecting prism 41 includes a first reflecting film surface 411 and a second reflecting film surface 412; the first reflecting prism group 33 is disposed in front of the left side of the second reflecting prism 42, and the second reflecting prism 42 includes a third reflecting film surface 421, such as... Figure 3 As shown.

[0048] The light guiding component 40 receives the emitted light emitted to the left from the light emitting component 10. The emitted light is reflected sequentially by the first reflective film surface 411 and the second reflective film surface 412, then strikes the second reflective prism 42. Finally, the emitted light is reflected sequentially by the third reflective film surface 421 and exits. Here, "emission to the left" can refer to light with a leftward component, for example... Figure 3 and Figure 5 In the middle, the emitted light is not emitted in a horizontal direction, but is emitted to the left front to the first reflecting prism 41.

[0049] In other embodiments, the reflecting prism may include more prisms with reflective function to guide the emitted light to the right rear, or the light guiding component 40 may be multiple optical fibers to guide the emitted light to the circulator component 30 at the right rear.

[0050] Because the emitted light from the light emitting component 10 is first emitted to the left, reflected by the first reflecting prism 41, and then transmitted to the second reflecting prism 42 at the rear right, and then continues to be transmitted to the left via the circulator component 30, the light emitting component 10 does not need to be located on the right side of the circulator component 30; the light emitting component 10 can be located on the front left side of the circulator component 30. In commonly used technologies, combined with the background technology and... Figure 1 As shown, both the light emitting component 10 and the light receiving component 20 need to be located on the right side of the circulator component 30, and the light emitting component 10 includes more components than the light receiving component 20. This results in the light emitting component 10 occupying a longer space on the right side of the circulator component 30, causing it to occupy a large space in the left-right direction. In this embodiment, the reference... Figure 3 As shown, in the left-right direction, at least a portion of the structure of the optical emitting component 10 is moved to the left front of the optical receiving component 20, utilizing the space in front of the circulator component 30, thereby reducing the space occupied on the right side of the circulator component 30, and further improving the space utilization rate inside the single-fiber bidirectional optical transceiver module 100.

[0051] Furthermore, the optical emitting assembly 10 includes a wavelength division multiplexer 11, and the optical receiving assembly 20 includes a wavelength division demultiplexer 21 and a photodetector. Additionally, the optical emitting assembly 10 also includes a laser assembly 12, which includes a substrate 123 disposed on the carrier plate 50, and a plurality of lasers 121 and collimating lenses 122 disposed on the substrate 123. The photodetector is disposed to the right of the wavelength division demultiplexer 21. Figure 3 As shown in the example, the laser 121 and the collimating lens 122 are arranged together. The four different wavelength light signals emitted by the laser 121 are collimated into parallel beams by the corresponding collimating lens 122, and then multiplexed by the wavelength division multiplexer 11. After passing through the circulator assembly 30, they are received and output by the optical port 60. The light signals including four different wavelengths input from the optical port 60 are combined by the wavelength division multiplexer 21 after passing through the circulator assembly 30, and then received by the subsequent structure such as the photodiode group.

[0052] exist Figure 3In it, the wavelength division multiplexer 11 is arranged at the left front of the wavelength division demultiplexer 21. The meaning of the left front is that the leftmost end of the wavelength division multiplexer 11 is located to the left of the leftmost end of the wavelength division demultiplexer 21, and the wavelength division multiplexer 11 is also in front of the wavelength division demultiplexer 21. Although some structures of the wavelength division demultiplexing are all to the left of the leftmost end of the wavelength division demultiplexer 21, it does not exclude that there are still some structures of the wavelength division demultiplexer 21 to the right of the leftmost end of the wavelength division demultiplexer 21.

[0053] In addition, in the left-right direction, the rightmost end of the carrier board 50 is flush with the rightmost end of the wavelength division demultiplexer 21. Still as Figure 3 shown, the meaning of the flush is that on the same front-back-upper-lower plane, the rightmost end of the carrier board 50 is basically flush with the rightmost end of the wavelength division demultiplexer 21, and this flush does not exclude a slight difference in the left-right direction. For example, the carrier board 50 is a little more to the right, or the wavelength division demultiplexer 21 is a little more to the right. However, this slight difference is very small relative to the overall size of the carrier board 50 or the overall size of the wavelength division demultiplexer 21, so small that it can be regarded as the rightmost end of the carrier board 50 being flush with the rightmost end of the wavelength division demultiplexer 21.

[0054] Furthermore, the optical guiding component 40 further includes an isolator 43 and a first half-wave plate 44. The isolator 43 is arranged between the first reflection prism 41 and the wavelength division multiplexer 11. The isolator 43 is not only used to prevent the transmitted light from returning to the optical transmitting component 10, but also used to prevent the received light from entering the optical transmitting component 10. Due to the presence of the isolator 43, the received light cannot enter the optical transmitting component 10, avoiding optical crosstalk in the optical transmitting component 10. The first half-wave plate 44 can offset the change in the polarization direction of the transmitted light that the isolator 43 may cause.

[0055] The first reflection prism 41, the first half-wave plate 44, the isolator 43 and the wavelength division multiplexer 11 are arranged in sequence from left to right.

[0056] Furthermore, the circulator component 30 includes a fourth reflection film surface 311. The transmitted light is reflected by the third reflection film surface 421 to the fourth reflection film surface 311, and then is reflected by the fourth reflection film surface 311 and shoots out to the left.

[0057] Refer Figure 3 、 4 、5, 7 shown, the included angle between the first reflection film surface 411 and the second reflection film surface 412 is 90°, and the included angle between the third reflection film surface 421 and the fourth reflection film surface 311 is 90°. In this way, the transmitted light that enters the first reflection prism 41 shoots out in completely opposite directions, and the transmitted light that enters the second reflection prism 42 shoots out in completely opposite directions. For example, in Figure 4The emitted light from the first reflecting prism 41 is reflected by the first reflecting prism 41 and emitted to the right. It is then reflected by the second reflecting prism 42 group 33 and finally reflected by the fourth reflecting film 311 and emitted to the left.

[0058] The circulator assembly 30 and the light guide assembly 40 in this embodiment can be as follows: Figure 4 As shown, the first reflective film surface 411, the second reflective film surface 412, the third reflective film surface 421 and the fourth reflective film surface 311 all form an angle of 90° with the left and right directions, and the transmission direction of the emitted light is completely towards the left, right, front or rear.

[0059] It can also be like Figure 3 and Figure 5 As shown, the first reflecting prism 41 and the second reflecting prism 42 are both tilted at a certain angle, and the emitted light is transmitted at an angle within the first reflecting prism 41 and the second reflecting prism 42.

[0060] For example Figure 6 As shown, the angle between the first reflective film surface 411 and the second reflective film surface 412, and the angle between the third reflective film surface 421 and the fourth reflective film surface 311, can be different from 90°. For example, it can be 60°. This can also achieve the following: the light first travels to the left, and after being reflected by the first reflective prism 41, it has a rightward component. Then, after passing through the second reflective prism 42 and the fourth reflective film surface 311, it travels to the left.

[0061] Furthermore, the first reflective film surface 411 and the third reflective film surface 421 are arranged in parallel, and the second reflective film surface 412 and the fourth reflective film surface 311 are arranged in parallel, such as Figures 3-7 As shown, the emitted light from the light emitting component 10 and the emitted light from the fourth reflective film surface 311 are parallel.

[0062] Furthermore, the circulator assembly 30 also includes an incident prism 31, a circulator 32, and a prism group 33, such as Figure 4 or Figure 7 As shown, the emitted light from the incident prism 31 passes through the circulator 32 and the prism group 33 in sequence before entering the light port 60.

[0063] The incident light emitted from the optical port 60 passes sequentially through the prism group 33, the circulator 32 and the incident prism 31 before entering the light receiving component 20.

[0064] Figure 3 The transmission path of the emitted light from the light emitting component 10 on the circulator component 30 is shown. Figure 7 The transmission path of incident light emitted via optical port 60 in the receiving optical path of circulator assembly 30 is shown. Figure 7In the diagram, "∣" represents a beam polarized in the parallel direction, and "·" represents a beam polarized in the perpendicular direction. It is important to understand that in the operating state of the circulator assembly 30, the transmitting and receiving optical paths can coexist simultaneously.

[0065] Furthermore, in the left-right direction, the circulator 32 is flush with a portion of the structure of the optical emitting component 10. More specifically, the wavelength division multiplexer 11 of the optical emitting component 10 is flush with the circulator 32 in the front-back and vertical planes. Since the shape and size of the wavelength division multiplexer 11 and the circulator 32 are not completely identical, it is understandable that a portion of the structure of the wavelength division multiplexer 11 is flush with a portion of the structure of the circulator 32 in the left-right direction, and the wavelength division multiplexer 11 may have some structures on the left and / or right side of the circulator 32. The fact that the circulator 32 is flush with a portion of the structure of the optical emitting component 10 indicates the specific location of the optical emitting component 10, illustrating that at least a portion of the structure of the optical emitting component 10 is located to the left front of the optical receiving component 20, and at least a portion of the structure of the circulator component 30 is located to the right rear of at least a portion of the structure of the optical guiding component 40.

[0066] Furthermore, such as Figure 4 As shown, the second reflecting prism 42 includes a third reflecting film 421, and the incident prism 31 includes a fourth reflecting film 311; a parallel polarized beam can pass through the first beam splitter 422, and a perpendicular polarized beam will be reflected when it passes through the first beam splitter 422.

[0067] The circulator 32 includes a second half-wave plate 322 and a Faraday rotator 321. The Faraday rotator 321 changes the polarization direction of light under the influence of a magnetic field, causing the polarization direction of light passing through it to rotate clockwise in the direction of light propagation and counterclockwise when passing in the opposite direction. The second half-wave plate 322 rotates the light clockwise when it passes in either the forward or reverse direction.

[0068] The prism assembly 33 includes a translation prism 331, a first prism 332, a second prism 334, and a second beam splitter 333 located between the first prism 332 and the second prism 334. The translation prism 331 can translate the beam to a suitable position. The first prism 332 and the second prism 334 can both be polarizing beam splitters and are arranged close together. The second beam splitter 333 allows parallel polarized beams to pass through and reflects vertical polarized beams.

[0069] The first reflective film 411, the second reflective film 412, the third reflective film 421, and the fourth reflective film 311 all reflect parallel and perpendicular polarized light beams.

[0070] The emitted light is reflected by the third reflective film 421, passes through the first beam splitter 422, and is reflected by the fourth reflective film 311 before exiting to the left; the horizontally polarized incident light in the incident light passes through the first beam splitter 422 and exits to the right, and the vertically polarized incident light in the incident light is reflected by the fourth reflective film 311 and is reflected by the first beam splitter 422 before exiting to the right.

[0071] The optical signal received at optical port 60 is incident on the wavelength division multiplexer 21 of optical receiving component 20 via circulator assembly 30. The emitted light emitted by optical transmitting component 10 is combined by its wavelength division multiplexer 11 and then transmitted to optical port 60 via circulator assembly 30. The emitted light emitted by optical transmitting component 10 is output from optical port 60. Optical transmitting component 10, optical receiving component 20, optical guiding component 40, and circulator assembly 30 are encapsulated in a housing. The orthogonal transformation of the polarization states of the emitted and incident light is achieved by using the combination of Faraday rotator 321, second half-wave plate 322, first reflecting prism 41, second reflecting prism 42, incident prism 31, and prism group 33, so that the emitted and received optical paths have different directions within the single-fiber bidirectional optical transceiver module 100, realizing the single-fiber bidirectional function.

[0072] During installation, the single-fiber bidirectional optical transceiver module 100 can first passively assemble the circulator 32 and glue it to the carrier plate 50. Then, the first reflecting prism 41 and the second reflecting prism 42 can be actively assembled, and the installation angle and position can be adjusted. They can also be glued to the carrier plate 50, thereby achieving effective control over the optical axis position and angle of the optical emitting component 10.

[0073] Compared with commonly used technologies, this embodiment has the following advantages:

[0074] By redesigning the structure of the single-fiber bidirectional optical transceiver module 100 and the positional relationship of its internal structure, the space utilization of the optical transmitting component 10 and the optical receiving component 20 is improved, allowing the circuit board 70 to be longer and more components to be integrated, thereby improving the integration of the single-fiber bidirectional optical transceiver module 100.

[0075] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0076] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A single-fiber bidirectional optical transceiver module, comprising a carrier board, and an optical port, an optical transmitting component, an optical receiving component, and a circulator component fixed on the carrier board, wherein the optical port, the circulator component, and the optical receiving component are arranged sequentially from left to right, characterized in that, The optical emitting component is arranged side by side with the circulator component and the optical receiving component in the front-back direction. At least part of the optical emitting component is arranged in front of the left side of the optical receiving component. The single-fiber bidirectional optical transceiver module also includes an optical guiding component, which is partially arranged to the left of the optical emitting component and partially arranged between the optical emitting component and the circulator component. The emitted light emitted to the left by the light emitting component enters the circulator component through the light guiding component, and at least part of the emitted light propagates to the right and rear during its propagation through the light guiding component.

2. The single-fiber bidirectional optical transceiver module according to claim 1, characterized in that, The light guiding component includes a reflecting prism that guides the emitted light from the light emitting component to the circulator component via reflection.

3. The single-fiber bidirectional optical transceiver module according to claim 2, characterized in that, The reflecting prism includes a first reflecting prism and a second reflecting prism. The first reflecting prism is disposed to the left of the light emitting component, and the second reflecting prism is disposed in front of the circulator component. The first reflecting prism reflects the emitted light emitted by the light emitting component to the second reflecting prism, and the second reflecting prism reflects the reflected light received from the first reflecting prism into the circulator component.

4. The single-fiber bidirectional optical transceiver module according to claim 3, characterized in that, The first reflecting prism includes a first reflecting film surface and a second reflecting film surface; The second reflecting prism is disposed to the right rear of the first reflecting prism, and the second reflecting prism includes a third reflecting film surface; The emitted light from the light emitting component is reflected sequentially by the first reflective film and the second reflective film, and then directed toward the second reflective prism. After being reflected again by the third reflective film, the emitted light enters the circulator component.

5. The single-fiber bidirectional optical transceiver module according to claim 4, characterized in that, The circulator assembly includes a fourth reflective film surface. The emitted light is reflected by the third reflective film surface to the fourth reflective film surface, and then reflected again by the fourth reflective film surface before being emitted to the left.

6. The single-fiber bidirectional optical transceiver module according to claim 5, characterized in that, The first reflective film surface is arranged parallel to the third reflective film surface, and the second reflective film surface is arranged parallel to the fourth reflective film surface.

7. The single-fiber bidirectional optical transceiver module according to claim 5 or 6, characterized in that, The angle between the first reflective film surface and the second reflective film surface is 90°, and the angle between the third reflective film surface and the fourth reflective film surface is 90°.

8. The single-fiber bidirectional optical transceiver module according to claim 1, characterized in that, The optical transmitting component includes a wavelength division multiplexer, and the optical receiving component includes a wavelength division multiplexer and a photodetector. The wavelength division multiplexer is located to the left front of the wavelength division multiplexer, and the photodetector is located to the right of the wavelength division multiplexer.

9. The single-fiber bidirectional optical transceiver module according to claim 8, characterized in that, The light emitting component further includes a laser component, which includes a substrate disposed on the carrier plate, and a plurality of lasers and collimating lenses disposed on the substrate; The laser component is located to the right of the wavelength division multiplexer, and the light emitted by the laser enters the wavelength division multiplexer through the collimating lens; In the left-right direction, the rightmost end of the laser component is aligned with the rightmost end of the wave demultiplexer.

10. The single-fiber bidirectional optical transceiver module according to claim 1, characterized in that, The single-fiber bidirectional optical transceiver module also includes a circuit board fixed on the carrier plate, which is located on the right side of the optical emitting component and the optical receiving component.

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