Multi-channel light emitter

Abstract

The utility model discloses a multichannel light emitter, relates to the optical communication technology field, the multichannel light emitter comprises a housing, an emergent light device, a wavelength division multiplexing prism, a first laser emission assembly, a second laser emission assembly and a light path deflection prism, the emergent light device passes through the housing, the wavelength division multiplexing prism is arranged in the housing, and the first laser emission assembly and the second laser emission assembly are arranged in the light path deflection prism. The first laser emitting assembly and the second laser emitting assembly are arranged on the two sides of the wavelength division multiplexing prism respectively, the optical path deflection prism is located between the wavelength division multiplexing prism and the second laser emitting assembly, and optical signals emitted by the first laser emitting assembly and the second laser emitting assembly are subjected to wave combination through the wavelength division multiplexing prism and then are emitted to the emergent light device. According to the multi-channel optical transmitter, wave combination is achieved through one wavelength division multiplexing prism, the space occupation of the wavelength division multiplexing prism is reduced, the optical path deflection prism is arranged, and the optical path of the second laser transmitting assembly is adjusted, so that the distribution of the second laser transmitting assembly is optimized, the overall structure size is reduced, and the applicability of the multi-channel optical transmitter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, and particularly relates to a multi-channel optical transmitter. Background Art

[0002] Wavelength Division Multiplexing (WDM) is a technology that combines two or more optical carrier signals with different wavelengths (carrying various information) at the transmitting end through a multiplexer (also known as a mux, abbreviated as MUX), and couples them into the same optical fiber of the optical line for transmission; at the receiving end, the demultiplexer (also known as a demux, abbreviated as DEMUX) separates the optical carrier signals of various wavelengths, and then the optical receiver further processes them to restore the original signal. This technology of simultaneously transmitting two or more optical signals with different wavelengths in the same optical fiber is called wavelength division multiplexing. The wavelength division multiplexing technology can achieve the transmission of multiple wavelength signals through a single optical fiber, which will multiply increase the transmission capacity of the optical fiber.

[0003] To implement wavelength division multiplexing, an optical transmitter with a multiplexer as the core is set at the transmitting end. The multiplexer can adopt a Z-BLOCK component. The Z-BLOCK component mainly includes a parallelogram wavelength division multiplexing prism polished on both the front and back sides. Beams of multiple wavelengths are incident on the wavelength division multiplexing prism at a designed angle. After a series of transmissions and reflections, they are combined and then emitted, thus realizing multiplexing.

[0004] In the design of a multi-channel optical transmitter, the coupling of the first few channels is relatively easy. However, for the last few channels, the more channels there are, the more reflection times there are inside the wavelength division multiplexing prism, and the worse the parallelism and spot quality of the emitted light beams will be. This will significantly affect the parallelism of the last few channels, and thus affect the overall coupling efficiency. In addition, with the increase in the number of channels, the increase in the optical path length will cause attenuation of the optical signal, affecting the quality of the optical signal. Therefore, relevant multi-channel optical transmitters will adopt multiple wavelength division multiplexing prisms to share the multiplexing task.

[0005] Taking the eight-channel as an example, there is usually a pair of wavelength division multiplexing prisms. Each wavelength division multiplexing prism is responsible for the multiplexing of 4 channels to obtain 2 channels, and then they are multiplexed again to obtain 1 channel, so as to reduce the number of reflections and the optical path length. However, this solution uses two wavelength division multiplexing prisms, and the overall structural size of the multi-channel optical transmitter is large. Summary of the Utility Model

[0006] The main purpose of the utility model is to propose a multi-channel optical transmitter, aiming to reduce the overall structural size of the multi-channel optical transmitter and improve the applicability of the multi-channel optical transmitter.

[0007] To achieve the above object, the multi-channel optical transmitter proposed by the present utility model includes a housing, an outgoing light device, a wavelength division multiplexing prism, a first laser emission component, a second laser emission component, and an optical path deflection prism. An installation groove is formed in the housing. The outgoing light device is disposed on the side wall of the installation groove. The wavelength division multiplexing prism is disposed on the inner wall of the installation groove and is located on one side of the outgoing light device. The first laser emission component, the second laser emission component, and the optical path deflection prism are disposed on the inner wall of the installation groove. The first laser emission component is located on the side of the wavelength division multiplexing prism facing away from the outgoing light device. The second laser emission component is located on the side of the wavelength division multiplexing prism facing away from the outgoing light device. The optical path deflection prism is located between the wavelength division multiplexing prism and the second laser emission component. The optical signal emitted by the first laser emission component is incident on the wavelength division multiplexing prism and then exits to the outgoing light device. The optical signal emitted by the second laser emission component is incident on the wavelength division multiplexing prism after passing through the optical path deflection prism, is reflected within the wavelength division multiplexing prism, and then exits to the outgoing light device.

[0008] In an embodiment, the wavelength division multiplexing prism has a first surface and a second surface that are parallel to each other. An outgoing area is formed on the second surface. The first surface is located on the side of the wavelength division multiplexing prism facing away from the outgoing light device. The second surface is located on the side of the wavelength division multiplexing prism facing the outgoing light device. The optical signal emitted by the first laser emission component is incident on the wavelength division multiplexing prism from the first surface and exits to the outgoing light device from the outgoing area. The optical signal emitted by the second laser emission component is incident on the wavelength division multiplexing prism from the second surface after passing through the optical path deflection prism, is reflected between the second surface and the first surface, and then exits to the outgoing light device from the outgoing area.

[0009] In an embodiment, the multi-channel optical transmitter further includes a first filter component and a second filter component. The first filter component is disposed on the first surface. The second filter component is disposed on the second surface. The first filter component is used to filter out the clutter in the optical signal emitted by the first laser emission component. The second filter component is used to filter out the clutter in the optical signal emitted by the second laser emission component.

[0010] In one embodiment, the first filter component includes a first filter, a second filter, a third filter, and a fourth filter. The second filter component includes a fifth filter, a sixth filter, a seventh filter, and an eighth filter. The fifth filter, the sixth filter, the seventh filter, and the eighth filter are disposed on one side of the exit area and are sequentially disposed on the second surface in a direction away from the exit area. The first filter, the second filter, the third filter, and the fourth filter are sequentially disposed on the first surface in a direction from the fifth filter to the eighth filter. The first filter to the eighth filter respectively allow optical signals in eight different wavelength ranges to pass through.

[0011] In one embodiment, the first laser emission component includes a first laser emitter, a second laser emitter, a third laser emitter, and a fourth laser emitter. The second laser emission component includes a fifth laser emitter, a sixth laser emitter, a seventh laser emitter, and an eighth laser emitter. The light rays emitted by the first laser emitter to the eighth laser emitter sequentially pass through the first filter to the eighth filter one by one and enter the wavelength division multiplexing prism for multiplexing, and are emitted from the exit area to the exit optical device.

[0012] In one embodiment, the multi-channel optical transmitter further includes an isolator, and the isolator is disposed between the exit area and the exit optical device.

[0013] In one embodiment, the orientation of the emission port of the first laser emission component is opposite to the orientation of the emission port of the second laser emission component, and the optical signal emitted by the first laser emission component is parallel to the optical signal emitted by the second laser emission component.

[0014] In one embodiment, the optical path deflection prism is a right-angled triangular prism. The side surface of the optical path deflection prism includes two right-angled triangular surfaces and an inclined surface. The emission port of the second laser emission component is disposed facing one of the right-angled triangular surfaces. The optical signal emitted by the second laser emission component is incident on the optical path deflection prism perpendicular to one of the right-angled triangular surfaces and exits from the inclined surface.

[0015] In one embodiment, the multi-channel optical transmitter further includes a substrate, and the substrate is connected to the bottom wall of the mounting groove. The wavelength division multiplexing prism and the optical path deflection prism are disposed on a side of the substrate facing away from the bottom wall of the mounting groove.

[0016] In one embodiment, the exit optical device is a collimator.

[0017] The multi-channel optical transmitter proposed by the present utility model includes a housing, an outgoing light device, a wavelength division multiplexing prism, a first laser emission component, a second laser emission component, and an optical path deflection prism. The outgoing light device passes through the housing, the wavelength division multiplexing prism is arranged inside the housing, the first laser emission component and the second laser emission component are respectively arranged on both sides of the wavelength division multiplexing prism, the optical path deflection prism is located between the wavelength division multiplexing prism and the second laser emission component, and the optical signals emitted by the first laser emission component and the second laser emission component are combined by the wavelength division multiplexing prism and then emitted to the outgoing light device. By using a wavelength division multiplexing prism to achieve optical signal combination, the space occupied by the wavelength division multiplexing prism is reduced, and by arranging the optical path deflection prism, the optical path of the second laser emission component is adjusted, thereby optimizing the distribution of the second laser emission component, reducing the overall structural size, and improving the applicability of the multi-channel optical transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 Structural schematic diagram of an embodiment of the multi-channel optical transmitter provided by the present utility model;

[0020] Figure 2 For Figure 1 Planar schematic diagram of the multi-channel optical transmitter in

[0021] Figure 3 For Figure 2 Optical path schematic diagram of the multi-channel optical transmitter in

[0022] Figure 4 For Figure 2 Installation schematic diagram of some parts of the multi-channel optical transmitter in

[0023] Figure 5 For Figure 4 Installation schematic diagram of the wavelength division multiplexing prism, the first filter component, and the second filter component of the multi-channel optical transmitter in

[0024] Figure 6 For Figure 5 Side view along line A - A' in

[0025] Figure 7 For Figure 5 Side view along line B - B' in

[0026] Figure 8 ForFigure 4 Optical path positioning diagram during the installation of a multi-channel optical transmitter.

[0027] Explanation of the reference numerals in the attached drawings:

[0028] 1000, multi-channel optical transmitter;

[0029] 1, housing; 1a, mounting groove;

[0030] 2, outgoing light device;

[0031] 3, wavelength division multiplexing prism; 31, first surface; 32, second surface; 321, outgoing area;

[0032] 4, first laser emission component; 41, first laser emitter; 42, second laser emitter; 43, third laser emitter; 44, fourth laser emitter;

[0033] 5, second laser emission component; 51, fifth laser emitter; 52, sixth laser emitter; 53, seventh laser emitter; 54, eighth laser emitter;

[0034] 6, optical path deflection prism;

[0035] 7, first filter component; 71, first filter; 72, second filter; 73, third filter; 74, fourth filter;

[0036] 8, second filter component; 81, fifth filter; 82, sixth filter; 83, seventh filter; 84, eighth filter;

[0037] 9, isolator;

[0038] 10, substrate.

[0039] The realization, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0043] The present utility model provides a multi-channel optical transmitter 1000, and the application scope of the present utility model includes but is not limited to 400G / 800G CWDM and LWDM 8-channel optical modules.

[0044] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the multi-channel optical transmitter 1000 includes a housing 1, an outgoing optical device 2, a wavelength division multiplexing prism 3, a first laser emission component 4, a second laser emission component 5, and an optical path deflection prism 6. An installation groove 1a is formed in the housing 1. The outgoing optical device 2 is arranged on the side wall of the installation groove 1a. The wavelength division multiplexing prism 3 is arranged on the inner wall of the installation groove 1a and is located on one side of the outgoing optical device 2. The first laser emission component 4, the second laser emission component 5, and the optical path deflection prism 6 are arranged on the inner wall of the installation groove 1a. The first laser emission component 4 is located on the side of the wavelength division multiplexing prism 3 facing away from the outgoing optical device 2. The second laser emission component 5 is located on the side of the wavelength division multiplexing prism 3 facing away from the outgoing optical device 2. The optical path deflection prism 6 is located between the wavelength division multiplexing prism 3 and the second laser emission component 5. The optical signal emitted by the first laser emission component 4 is incident on the wavelength division multiplexing prism 3 and then exits to the outgoing optical device 2. The optical signal emitted by the second laser emission component 5 is incident on the wavelength division multiplexing prism 3 after passing through the optical path deflection prism 6, is reflected in the wavelength division multiplexing prism 3, and then exits to the outgoing optical device 2.

[0045] In this embodiment, the outer shell 1 has a box-shaped or box-like structure. A rectangular installation groove 1a is formed inside the outer shell 1. Through holes are provided on the side walls of the installation groove 1a, and the outgoing light device 2 is inserted into the inner walls of the through holes. The outgoing light device 2 is an optical lens or a collimator, etc. The function of the outgoing light device 2 is to guide the optical signal inside the outer shell 1 to the outside of the outer shell 1, such as guiding it into an optical fiber connected to the outgoing light device 2. After all the parts inside the shell are installed, the notch of the installation groove 1a is sealed with a cover plate, and a sealing member is provided to ensure the airtightness of the outer shell 1.

[0046] The wavelength division multiplexing prism 3 is arranged on the bottom wall of the installation groove 1a and is aligned with the outgoing light device 2. The wavelength division multiplexing prism 3 is in the shape of a parallelogram. Please refer to Figure 4 , the included angle between the hypotenuse and the base of the parallelogram is 82°. The optical signal emitted by the first laser emission component 4 or the second laser emission component 5 is parallel to the base and enters the wavelength division multiplexing prism 3 from the other hypotenuse at an included angle of 82°. The surface of the wavelength division multiplexing prism 3 for the incident optical signal is polished, and an antireflection film is provided to improve the passing performance of the optical signal.

[0047] The first laser emission component 4 and the second laser emission component 5 are arranged on the bottom wall of the installation groove 1a. And a PCBA board is provided in the installation groove 1a. The PCBA board is provided with a control circuit and is equipped with a control system. The PCBA board is electrically connected to the first laser emission component 4 and the second laser emission component 5 respectively, for supplying power to and controlling the first laser emission component 4 and the second laser emission component 5, so as to achieve precise control of the change of the optical signal and the laser emission power, etc., and ensure the optical signal quality. Both the first laser emission component 4 and the second laser emission component 5 are used to provide a light source. The first laser emission component 4 and the second laser emission component 5 include multiple laser emitters, which are used to emit optical signals in different wavelength ranges. The laser emitter can be a light-emitting diode or a laser diode, etc.

[0048] The optical path deflection prism 6 is arranged on the bottom plate of the installation groove 1a, and is used to deflect the optical signal emitted by the second laser emission component 5. After the optical signal emitted by the second laser emission component 5 is deflected, it can accurately reach the corresponding area of the wavelength division multiplexing prism 3. In this way, the position distribution of the second laser emission component 5 can be adjusted conversely. Please refer to Figure 3 , the first laser emission component 4, the wavelength division multiplexing prism 3, and the outgoing light device 2 are all arranged close to one side wall of the installation groove 1a, while the second laser emission component 5 is relatively far from the above-mentioned side wall. By adjusting the position or shape of the optical path deflection prism 6, the degree of deflection of its optical path can be adjusted, so as to make the second laser emission component 5 closer to the above-mentioned side wall. In this way, the width of the outer shell 1 can be reduced.

[0049] The multi-channel optical transmitter 1000 of this embodiment combines wavelengths through a wavelength division multiplexing prism 3. Compared with the solution of setting multiple wavelength division multiplexing prisms 3, the number of wavelength division multiplexing prisms 3 is reduced, the space occupied by the wavelength division multiplexing prism 3 is decreased, the overall structural size is reduced, and at the same time, the sealing of the housing 1 is easier to achieve. By setting an optical path deflection prism 6, the optical path of the second laser emission component 5 is adjusted, thereby optimizing the distribution of the second laser emission component 5, further reducing the overall structural size, and improving the applicability of the multi-channel optical transmitter 1000.

[0050] Further, please refer to Figures 2 to 3 , in an embodiment of the present utility model, the wavelength division multiplexing prism 3 has a first surface 31 and a second surface 32 that are parallel to each other. An emission area 321 is formed on the second surface 32. The first surface 31 is located on the side of the wavelength division multiplexing prism 3 facing away from the outgoing optical device 2, and the second surface 32 is located on the side of the wavelength division multiplexing prism 3 facing the outgoing optical device 2. The optical signal emitted by the first laser emission component 4 enters the wavelength division multiplexing prism 3 from the first surface 31 and exits to the outgoing optical device 2 from the emission area 321. The optical signal emitted by the second laser emission component 5 enters the wavelength division multiplexing prism 3 from the second surface 32 after passing through the optical path deflection prism 6, is reflected between the second surface 32 and the first surface 31, and exits to the outgoing optical device 2 from the emission area 321.

[0051] In this embodiment, the first surface 31 and the second surface 32 are subjected to precision polishing treatment. After polishing, the first surface 31 and the second surface 32 can reduce the scattering of light, thereby reducing the loss of light during transmission. For the wavelength division multiplexing prism 3, reducing light loss is the key to improving the overall system performance. At the same time, it can also reduce signal interference and improve the integrity and quality of the signal. Precision polishing ensures the angular and dimensional accuracy of the prism, which is crucial for ensuring that light beams of different wavelengths can be correctly transmitted and reflected at a predetermined angle.

[0052] The first surface 31 and the second surface 32 are parallel to each other. The optical signal of a laser emitter undergoes multiple reflections between the first surface 31 and the second surface 32, forming two sets of reflection optical paths within the wavelength division multiplexing prism 3, and forming a set of reflection points on each of the first surface 31 and the second surface 32. The reflection optical paths of the same set are parallel to each other, and the distance between the reflection points of the same set is equal. Outside the wavelength division multiplexing prism 3, multiple laser emitters are further arranged at positions opposite to the reflection points, for emitting optical signals within different wavelength ranges and entering the wavelength division multiplexing prism 3 from the reflection points to achieve wavelength combination. In this way, multiple laser emitters can also be arranged at equal distances, the structure is more compact, the space occupied by the laser emitters is reduced, and the production difficulty is lowered.

[0053] Further, in order to filter out the clutter entering the wavelength division multiplexing prism 3 and extract effective optical signals, please refer toFigure 4 , in an embodiment of the present utility model, the multi-channel optical transmitter 1000 further includes a first optical filter assembly 7 and a second optical filter assembly 8. The first optical filter assembly 7 is disposed on the first surface 31, and the second optical filter assembly 8 is disposed on the second surface 32. The first optical filter assembly 7 is used to filter out the clutter in the optical signal emitted by the first laser emission assembly 4, and the second optical filter assembly 8 is used to filter out the clutter in the optical signal emitted by the second laser emission assembly 5.

[0054] In this embodiment, the first optical filter assembly 7 and the second optical filter assembly 8 include a plurality of optical filters or filter plates, etc. Each optical filter or filter plate allows an optical signal within a specific wavelength range to pass through. Each optical filter or filter plate corresponds to a different wavelength range, and can respectively filter the optical signals emitted by a plurality of laser transmitters in front of the multiplexing prism 3, reducing the signal interference within the wavelength division multiplexing prism 3.

[0055] Furthermore, please refer to Figures 5 to 7 , in an embodiment of the present utility model, the first optical filter assembly 7 includes a first filter plate 71, a second filter plate 72, a third filter plate 73, and a fourth filter plate 74. The second optical filter assembly 8 includes a fifth filter plate 81, a sixth filter plate 82, a seventh filter plate 83, and an eighth filter plate 84. The fifth filter plate 81, the sixth filter plate 82, the seventh filter plate 83, and the eighth filter plate 84 are disposed on one side of the exit area 321 and are sequentially disposed on the second surface 32 along the direction away from the exit area 321. The first filter plate 71, the second filter plate 72, the third filter plate 73, and the fourth filter plate 74 are sequentially disposed on the first surface 31 along the direction from the fifth filter plate 81 to the eighth filter plate 84. The first filter plate 71 to the eighth filter plate 84 respectively allow optical signals within eight different wavelength ranges to pass through.

[0056] This embodiment provides a setting scheme for the filter plates of an eight-channel optical transmitter. In this embodiment, the eight filter plates respectively correspond to eight different wavelength ranges. Four of the filter plates are equidistantly disposed on the first surface 31, and the other four filter plates are equidistantly disposed on the second surface 32. Within the wavelength division multiplexing prism 3, the longest optical path channel is: the optical signal enters the wavelength division multiplexing prism 3 from the eighth filter plate 84, and is reflected at the fourth filter plate 74, the seventh filter plate 83, the third filter plate 73, the sixth filter plate 82, the second filter plate 72, the fifth filter plate 81, and the first filter plate 71 in sequence, and then exits the wavelength division multiplexing prism 3 from the exit area 321. The optical signals of the remaining seven channels respectively enter the wavelength division multiplexing prism 3 from the first filter plate 71 to the seventh filter plate 83 and are combined into the above-mentioned longest optical path, realizing the multiplexing of optical signals within eight different wavelength ranges.

[0057] Still further, please refer to Figures 1 to 2, in an embodiment of the present utility model, the first laser emission assembly 4 includes a first laser emitter 41, a second laser emitter 42, a third laser emitter 43, and a fourth laser emitter 44, and the second laser emission assembly 5 includes a fifth laser emitter 51, a sixth laser emitter 52, a seventh laser emitter 53, and an eighth laser emitter 54. The light rays emitted by the first laser emitter 41 to the eighth laser emitter 54 sequentially pass through the first filter 71 to the eighth filter 84 one by one and enter the wavelength division multiplexing prism 3 for multiplexing, and are emitted from the emission area 321 to the emission optical device 2.

[0058] This embodiment provides a setting scheme for the laser emission assembly of an eight-channel optical emitter. In this embodiment, the eight laser emitters respectively correspond to eight different wavelength ranges. Among them, the first laser emitter 41 to the fourth laser emitter 44 are equidistantly arranged on one side of the wavelength division multiplexing prism 3 facing away from the emission optical device 2, and the optical signals emitted by the first laser emitter 41 to the fourth laser emitter 44 are parallel to each other. The fifth laser emitter 51 to the eighth laser emitter 54 are equidistantly arranged on one side of the wavelength division multiplexing prism 3 facing the emission optical device 2, and the optical signals emitted by the fifth laser emitter 51 to the eighth laser emitter 54 are parallel to each other.

[0059] Further, please refer to Figures 1 to 3 , in an embodiment of the present utility model, the multi-channel optical emitter 1000 further includes an isolator 9, and the isolator 9 is arranged between the emission area 321 and the emission optical device 2.

[0060] In this embodiment, the optical signal emitted from the emission area 321 passes through the isolator 9 and then reaches the emission optical device 2, and is coupled into the optical fiber connected to the emission optical device 2. The isolator 9 only allows the unidirectional passage of optical signals, that is, the isolator 9 allows the optical signals in the direction from the wavelength division multiplexing prism 3 to the emission optical device 2 to pass through, while blocking the optical signals in the direction from the emission optical device 2 to the wavelength division multiplexing prism 3.

[0061] Please refer to Figure 3 , in an embodiment of the present utility model, the orientation of the emission port of the first laser emission assembly 4 is opposite to the orientation of the emission port of the second laser emission assembly 5, and the optical signal emitted by the first laser emission assembly 4 is parallel to the optical signal emitted by the second laser emission assembly 5.

[0062] In this embodiment, the housing 1 and the mounting groove 1a are in a box shape. An optical path deflection prism 6 is provided between the wavelength division multiplexing prism 3 and the second laser emitting component 5. By determining the deflection angle of the optical path deflection prism 6 during the optical path design, the optical signal emitted by the second laser emitting component 5 is parallel to the optical signal emitted by the first laser emitting component 4, and is parallel to the two opposite side walls of the mounting groove 1a, that is, consistent with the length direction of the box-shaped housing 1, so that the distribution of the first laser emitting component 4 and the second laser emitting component 5 is more compact, reducing the width of the housing 1, which is beneficial to the miniaturization of the multi-channel optical transmitter 1000.

[0063] Please refer to Figure 3 , in an embodiment of the present utility model, the optical path deflection prism 6 is a right triangular prism. The side surface of the optical path deflection prism 6 includes two right triangular surfaces and an inclined surface. The emission port of the second laser emitting component 5 is arranged facing a right triangular surface. The optical signal emitted by the second laser emitting component 5 is incident on the optical path deflection prism 6 perpendicular to a right triangular surface and exits from the inclined surface.

[0064] In this embodiment, the optical path deflection prism 6 is a right triangular prism with a constant cross-section. The cross-sectional shape is a right triangle. The two right sides of the right triangle correspond to the two right triangular surfaces of the right triangular prism, and the hypotenuse of the right triangle corresponds to the inclined surface of the right triangular prism. The optical signal emitted by the second laser emitting component 5 is incident on the optical path deflection prism 6 perpendicular to a right triangular surface and exits from the inclined surface, and only refraction occurs at the inclined surface and no refraction occurs at the right triangular surface, which can reduce the number of refractions of the optical signal in the optical path deflection prism 6 and reduce the attenuation of the optical signal.

[0065] Please refer to Figure 4 and Figure 8 , in an embodiment of the present utility model, the multi-channel optical transmitter 1000 further includes a substrate 10. The substrate 10 is connected to the bottom wall of the mounting groove 1a. The wavelength division multiplexing prism 3 and the optical path deflection prism 6 are arranged on the side of the substrate 10 facing away from the bottom wall of the mounting groove 1a.

[0066] In this embodiment, in order to simplify the installation steps and reduce the coupling difficulty, first install the substrate 10, the isolator 9, the wavelength division multiplexing prism 3 and the optical path deflection prism 6 according to the preset optical path, and then install the substrate 10 at a preset position in the mounting groove 1a. The substrate 10 can be a ceramic substrate 10 or a glass plate, etc. Specifically, using an automatic chip mounter, stick the filter on the corresponding position of the wavelength division multiplexing prism 3 according to the positioning requirements, then stick the wavelength division multiplexing prism 3 and the isolator 9 on the substrate 10, then preliminarily position the triangular prism according to the reverse optical path with a spot meter and fit it on the substrate 10, and finally couple the substrate 10 into the mounting groove 1a.

[0067] Please refer to Figure 1, in an embodiment of the present utility model, the light emitting device 2 is a collimator. The collimator is used to convert the light beam from a light source (such as a laser diode or an LED) into a flat light beam with a small divergence angle. In this way, the light beam can maintain a relatively concentrated form during transmission, so as to be more effectively coupled into the optical fiber. When improving the propagation of the light beam in the optical fiber, the transmission quality and transmission distance of the optical signal can be enhanced.

[0068] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A multi-channel optical transmitter, characterized in that, The multi-channel optical transmitter includes a housing (1), an outgoing light device (2), a wavelength division multiplexing prism (3), a first laser emission component (4), a second laser emission component (5), and an optical path deflection prism (6). An installation groove (1a) is formed in the housing (1). The outgoing light device (2) is arranged on the side wall of the installation groove (1a), and the wavelength division multiplexing prism (3) is arranged on the inner wall of the installation groove (1a) and is located on one side of the outgoing light device (2). The first laser emission component (4), the second laser emission component (5), and the optical path deflection prism (6) are arranged on the inner wall of the installation groove (1a). The first laser emission component (4) is located on the side of the wavelength division multiplexing prism (3) facing away from the outgoing light device (2), the second laser emission component (5) is located on the side of the wavelength division multiplexing prism (3) facing away from the outgoing light device (2), and the optical path deflection prism (6) is located between the wavelength division multiplexing prism (3) and the second laser emission component (5). The optical signal emitted by the first laser emission component (4) is incident on the wavelength division multiplexing prism (3) and then exits to the outgoing light device (2). The optical signal emitted by the second laser emission component (5) is incident on the wavelength division multiplexing prism (3) after passing through the optical path deflection prism (6), is reflected within the wavelength division multiplexing prism (3), and then exits to the outgoing light device (2).

2. The multi-channel optical transmitter according to claim 1, wherein The wavelength division multiplexing prism (3) has a first surface (31) and a second surface (32) that are parallel to each other, and an outgoing area (321) is formed on the second surface (32). The first surface (31) is located on the side of the wavelength division multiplexing prism (3) facing away from the outgoing light device (2), and the second surface (32) is located on the side of the wavelength division multiplexing prism (3) facing the outgoing light device (2). The optical signal emitted by the first laser emission component (4) is incident on the wavelength division multiplexing prism (3) from the first surface (31) and exits to the outgoing light device (2) from the outgoing area (321). The optical signal emitted by the second laser emission component (5) is incident on the wavelength division multiplexing prism (3) from the second surface (32) after passing through the optical path deflection prism (6), is reflected between the second surface (32) and the first surface (31), and then exits to the outgoing light device (2) from the outgoing area (321).

3. The multi-channel optical transmitter according to claim 2, wherein, The multi-channel optical transmitter further includes a first filter component (7) and a second filter component (8). The first filter component (7) is arranged on the first surface (31), and the second filter component (8) is arranged on the second surface (32). The first filter component (7) is used to filter the clutter in the optical signal emitted by the first laser emission component (4), and the second filter component (8) is used to filter the clutter in the optical signal emitted by the second laser emission component (5).

4. The multi-channel optical transmitter according to claim 3, characterized in that, The first filter component (7) includes a first filter (71), a second filter (72), a third filter (73), and a fourth filter (74), and the second filter component (8) includes a fifth filter (81), a sixth filter (82), a seventh filter (83), and an eighth filter (84); The fifth filter (81), the sixth filter (82), the seventh filter (83), and the eighth filter (84) are disposed on one side of the output area (321) and are sequentially disposed on the second surface (32) in a direction away from the output area (321). The first filter (71), the second filter (72), the third filter (73), and the fourth filter (74) are sequentially disposed on the first surface (31) along the direction from the fifth filter (81) to the eighth filter (84); The first filter (71) to the eighth filter (84) respectively allow optical signals in eight different wavelength ranges to pass through.

5. The multi-channel optical transmitter according to claim 4, wherein The first laser emission component (4) includes a first laser emitter (41), a second laser emitter (42), a third laser emitter (43), and a fourth laser emitter (44); The second laser emission component (5) includes a fifth laser emitter (51), a sixth laser emitter (52), a seventh laser emitter (53), and an eighth laser emitter (54); The light rays emitted by the first laser emitter (41) to the eighth laser emitter (54) sequentially pass through the first filter (71) to the eighth filter (84) one by one and enter the wavelength division multiplexing prism (3) for wavelength multiplexing, and are emitted from the output area (321) to the output optical device (2).

6. The multi-channel optical transmitter according to claim 2, wherein, The multi-channel optical transmitter further includes an isolator (9), and the isolator (9) is disposed between the output area (321) and the output optical device (2).

7. The multi-channel optical transmitter according to any one of claims 1 to 6, characterized in that, The orientation of the emission port of the first laser emission component (4) is opposite to that of the emission port of the second laser emission component (5), and the optical signal emitted by the first laser emission component (4) is parallel to the optical signal emitted by the second laser emission component (5).

8. The multi-channel optical transmitter according to any one of claims 1 to 6, characterized in that, The optical path deflection prism (6) is a right triangular prism, and the side surface of the optical path deflection prism (6) includes two right triangular surfaces and an inclined surface; The emission port of the second laser emission component (5) is disposed facing one of the right triangular surfaces, and the optical signal emitted by the second laser emission component (5) perpendicularly enters the optical path deflection prism (6) from one of the right triangular surfaces and is emitted from the inclined surface.

9. The multi-channel optical transmitter according to any one of claims 1 to 6, characterized in that The multi-channel optical transmitter further includes a substrate (10), the substrate (10) is connected to the bottom wall of the mounting groove (1a), and the wavelength division multiplexing prism (3) and the optical path deflection prism (6) are disposed on a side of the substrate (10) facing away from the bottom wall of the mounting groove (1a).

10. The multi-channel optical transmitter according to any one of claims 1 to 6, characterized in that The output optical device (2) is a collimator.

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