Optical module without tail fiber, assembling method and using method

Abstract

The invention discloses a pigtail-free optical module, an assembling method and a using method, optical signals are transmitted through a first lens array, a reflector and a second lens array, then optical fibers are arranged in an MT fixer on the outer side, optical paths are coupled, the optical fibers do not need to be inserted into a shell, the risks of air leakage of welded optical fibers and damage to the optical fibers do not exist, and the service life of the optical fibers is prolonged. The coupling process is simple, the structure has no requirement on the length of the optical fiber, the adaptability is higher, the original metal optical fiber is replaced, and the optical module can be subjected to reflow soldering to realize airtight packaging.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical modules, and relates to a tailless optical module, an assembly method and a use method thereof. Background Art

[0002] Digital optical modules mainly consist of optoelectronic devices, functional circuits and optical interfaces, and realize the optical / electrical and electrical / optical conversion of digital signals. They are widely used in various digital optical communication systems, such as fiber channel, gigabit Ethernet, SONET / SDH, switches, etc.

[0003] With the continuous improvement of the data communication capacity of digital optical modules, the number of channels of optical modules is increasing, and at the same time, the application scenarios of the modules are constantly expanding, and the environmental requirements are more stringent. Therefore, the packaging structure of digital optical modules must also be continuously improved. The hermetic parallel optical module packaging used in the existing aerospace / commercial aviation industry is as Figure 1 shown, and the internal packaging diagram of the housing is as Figure 2 shown. The entire optical module mainly includes a laser array 3, a detector array 4, a housing, a metallized optical fiber, a PCB board 7, etc. The schematic diagram of the metallized optical fiber is as Figure 3 shown, and the coupling schematic diagram of the optical fiber and the laser / detector array 4 is as Figure 4 shown. The end face of the fiber array is generally at an angle of 42.5° or 45°. The light emitted by the laser array 3 is emitted upward and reflected into the optical fiber after reaching the inclined end face of the optical fiber, and the light emitted by the optical fiber enters the detector array 4 downward after passing through the inclined end face of the optical fiber. This product has the following problems:

[0004] 1) The hermetic packaging uses metallized optical fibers. During assembly, the metal ring part of the metallized optical fiber is welded to the housing. The metallized optical fiber is expensive and the cost is high;

[0005] 2) When the metallized optical fiber is welded to the housing, the temperature is relatively high, which is likely to damage the optical fiber;

[0006] 3) Since the metallized optical fiber and the lasers / detectors mounted inside need to be coupled and moved, the metal ring of the metallized optical fiber is not centered at the position of the elliptical mounting hole of the housing. When welding the metallized optical fiber, there is uneven stress distribution and asymmetry in position, which will lead to the probability of air leakage;

[0007] 4) The metallized optical fiber itself is a fiber with a tape. The tape itself is a non-hermetic component, and it is easy to cause misjudgment during the airtightness detection of the product, affecting the product yield.

[0008] 5) The coupling process is complex. When coupling the optical module, the fiber head needs to pass through the elliptical mounting hole of the housing first. Since the sizes of the fiber head and the elliptical mounting hole are relatively close, the fiber head is likely to touch the elliptical mounting hole and the bottom of the housing, causing damage and scrapping of the optical fiber.

[0009] 6) After the module is encapsulated, it comes with an optical fiber. The conventional optical fiber itself cannot pass through reflow soldering, so the entire optical module cannot pass through reflow soldering.

[0010] 7) The length of the optical fiber of this optical module needs to be customized according to customer requirements for different lengths of optical fibers, which further increases the cost of the optical module, affects product management, and delays the product production time.

[0011] 8) Since the metallized optical fiber cannot be disassembled after being welded to the housing, the product cannot be repaired and does not have repairability. Summary of the Invention

[0012] The purpose of the present invention is to solve the problems in the prior art that the optical fiber is set for plugging and unplugging, and during coupling and soldering, the optical fiber will be damaged, and air leakage is likely to occur during assembly, affecting hermetic packaging. The present invention provides a tailless optical module, an assembly method and a usage method.

[0013] To achieve the above object, the present invention adopts the following technical solutions:

[0014] A tailless optical module includes a housing, and an optical path coupling unit, a laser array, a detector array, a laser driver, a transimpedance amplifier and a PCB board are arranged inside the housing;

[0015] The optical path coupling unit includes a support frame, a reflecting sheet is arranged at one end of the support frame, a first lens array is arranged below the reflecting sheet, a window is opened at the end of the support frame far from the reflecting sheet, a second lens array is arranged at the window, the optical path is transmitted to the reflecting sheet through the first lens array, reflected by the reflecting sheet and then transmitted to the second lens array, and converges to the MT fiber optic patch cord through the window;

[0016] A housing optical window corresponding to the window is opened on the housing, and a corresponding MT holder is arranged outside the housing optical window, and the MT fiber optic patch cord is located inside the MT holder;

[0017] The PCB board is connected to the laser array and the detector array, the laser driver is connected to the laser array, and the transimpedance amplifier is connected to the detector array.

[0018] A further improvement of the present invention lies in:

[0019] The MT holder includes an MT mounting frame, and MT positioning posts are arranged inside the MT mounting frame, and the MT positioning posts are used for assembling the MT fiber optic patch cord.

[0020] An MT limiter is arranged outside the MT mounting frame, and the MT limiter can rotate along the MT mounting frame, and the MT limiter is used for limiting the MT fiber optic patch cord.

[0021] A rotating shaft and a limiting groove are provided on the side wall of the MT mounting frame, and a rotating hole and a positioning protrusion are provided on the MT limiter;

[0022] The rotating hole is correspondingly connected to the rotating shaft, and the positioning protrusion cooperates with the limiting groove to limit the MT fiber optic jumper;

[0023] One end of the MT limiter is provided with a limiting surface. When the MT limiter rotates along the MT mounting frame to be in a horizontal direction with the MT mounting frame, the positioning protrusion is located in the limiting groove, and the inner side wall of the limiting surface abuts against the end of the MT head in the MT fiber optic jumper.

[0024] A metal frame is provided between the MT mounting frame and the housing, and a metal optical window corresponding to the MT mounting frame is provided on the metal frame.

[0025] A reflective film is plated on the reflective sheet.

[0026] An assembly method of a tailless optical module includes the following steps:

[0027] Place the laser array, detector array, laser driver, transimpedance amplifier, and PCB board at corresponding positions in the housing;

[0028] Assemble the MT holder to one side of the housing;

[0029] Assemble the MT fiber optic jumper in the MT holder, adjust the position of the optical path coupling unit. When the current optical power of the MT fiber optic jumper is the maximum, set the position where the current optical path coupling unit is located as the optimal position, and fix the optical path coupling unit to the optimal position;

[0030] According to the fixed optical path coupling unit, adjust the position of the MT holder. When the current optical power of the MT fiber optic jumper is the maximum, fix the MT holder to the current position;

[0031] Pull out the MT fiber optic jumper, perform a sealing assembly on the housing, and complete the assembly.

[0032] The optical path coupling unit is fixed by bonding or welding.

[0033] A usage method of a tailless optical module includes the following steps:

[0034] Insert the MT fiber optic jumper into the MT holder;

[0035] The laser array transmits light to the first lens array;

[0036] The first lens array converts the light into collimated light and transmits it vertically upward to the reflective sheet;

[0037] The reflective sheet transmits the collimated light horizontally to the second lens array;

[0038] The second lens array converts the collimated light into convergent light and couples the convergent light into the MT fiber optic patch cord;

[0039] The MT fiber optic patch cord transmits the light to the second lens array, and the second lens array converts the light into collimated light and then transmits it to the reflector and the first lens array in sequence;

[0040] The first lens array converts the collimated light into convergent light and converges it to the detector array, and the detector array converts the optical signal into an electrical current signal.

[0041] When inserting the MT fiber optic patch cord into the MT holder, it further includes:

[0042] The MT holder includes an MT mounting frame, and a rotating shaft and a limiting groove are provided on the side wall of the MT mounting frame.

[0043] An MT limiter is arranged outside the MT mounting frame. A rotating hole and a positioning protrusion are provided on the MT limiter, and a limiting surface is arranged at one end of the MT limiter.

[0044] The rotating hole is correspondingly connected to the rotating shaft. When inserting the MT fiber optic patch cord, the MT limiter is rotated upward. After inserting the MT fiber optic patch cord, the MT limiter is rotated downward until the MT limiter is in a horizontal state. At this time, the positioning protrusion is located in the limiting groove, and the inner side wall of the limiting surface abuts against the end of the MT head in the MT fiber optic patch cord.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The present invention discloses a tail - free optical module. The optical signal transmission is realized through the first lens array, reflection and the second lens array, and then the optical fiber is arranged in the MT holder on the outside to couple the optical path. The optical fiber does not need to be inserted into the inside of the housing, and there is no risk of air leakage due to welding the optical fiber and damage to the optical fiber. The coupling process is simple. This structure has no requirement for the length of the optical fiber, has higher adaptability, replaces the original metal optical fiber, and the optical module can pass through reflow soldering to achieve hermetic packaging.

[0047] Furthermore, in the optical module disclosed by the present invention, the MT limiter can rotate along the MT mounting frame to limit the MT fiber optic patch cord and prevent the MT fiber optic patch cord from moving after insertion.

[0048] Furthermore, in the optical module disclosed by the present invention, a reflective film is plated on the reflector, and the reflectivity is higher.

[0049] The assembly method of a tailless optical module in this embodiment can adjust the relative positions of the optical path coupling unit and the MT holder to the optimal during assembly, and then perform sealed assembly. The assembly efficiency is improved. During subsequent application, only by inserting the MT fiber optic jumper into the MT holder can it work, and the reliability of the optical module is improved, which is convenient for users to use. Replacing the original metal fiber, the optical module can pass through reflow soldering to achieve hermetic packaging.

[0050] The present invention also discloses a usage method of a tailless optical module. The optical signal transmission is realized through the first lens array, the reflector, and the second lens array. Then, the optical fiber is arranged in the MT holder on the outside to couple the optical path. The optical fiber does not need to be inserted into the inside of the housing, and there is no risk of leakage of the welded optical fiber and damage to the optical fiber. The coupling process is simple. This structure has no requirement for the length of the optical fiber and has higher adaptability. Replacing the original metal fiber, the optical module can pass through reflow soldering to achieve hermetic packaging. Brief Description of the Drawings

[0051] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0052] Figure 1 It is the overall structure diagram of the present invention;

[0053] Figure 2 It is the structure diagram of the MT holder of the present invention;

[0054] Figure 3 It is the structure diagram of the MT limiter of the present invention;

[0055] Figure 4 It is the structure diagram of the MT fiber optic jumper of the present invention;

[0056] Figure 5 It is the active state diagram of the MT limiter when the MT fiber optic jumper of the present invention is inserted into the MT holder;

[0057] Figure 6 It is the locked and limited state diagram of the MT limiter when the MT fiber optic jumper of the present invention is inserted into the MT holder.

[0058] Figure 7 It is the structure diagram of the metal frame of the present invention;

[0059] Figure 8 It is the structure diagram of the optical path coupling unit of the present invention;

[0060] Figure 9Internal overall structure diagram of the present invention;

[0061] Figure 10 Internal structure diagram of the optical path coupling unit structure of the present invention;

[0062] Figure 11 Optical path transmission structure of the present invention Figure 1 ;

[0063] Figure 12 Optical path transmission structure of the present invention Figure 2 。

[0064] Wherein: 1 - housing; 2 - optical path coupling unit; 3 - laser array; 4 - detector array; 5 - laser driver; 6 - transimpedance amplifier; 7 - PCB board; 8 - support frame; 9 - reflector; 10 - first lens array; 11 - window; 12 - second lens array; 13 - MT mounting frame; 14 - MT limiter; 15 - rotating shaft; 16 - limiting groove; 17 - rotating hole; 18 - positioning protrusion; 19 - MT positioning; 20 - metal frame; 21 - metal optical window; 22 - MT head; 23 - MT positioning hole; 24 - MT positioning post; 25 - MT head and tail end; 26 - end face of fiber array; 27 - fiber array; 28 - limiting surface; 29 - cover plate. Specific embodiments

[0065] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0066] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0067] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0068] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0069] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0070] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0071] The following further describes the present invention in detail with reference to the drawings:

[0072] See Figures 1 to 12 , an optical module without a pigtail is disclosed in the embodiments of the present invention. The optical module can achieve low cost, pluggable, reflow solderable, and hermetically sealed packaging, and specifically includes:

[0073] A tail - fiber - free optical module includes a housing 1. Inside the housing 1, there are an optical path coupling unit 2, a laser array 3, a detector array 4, a laser driver 5, a trans - impedance amplifier 6, and a PCB board 7. The optical path coupling unit 2 includes a support frame 8. One end of the support frame 8 is provided with a reflector 9. Below the reflector 9, there is a first lens array 10. At the end of the support frame 8 away from the reflector 9, there is a window 11. At the window 11, there is a second lens array 12. The optical path is transmitted through the first lens array 10 to the reflector 9, reflected by the reflector 9 and then transmitted to the second lens array 12, and converges to the optical fiber through the window 11. On the housing 1, there is a housing optical window corresponding to the window 11. Outside the housing optical window, there is a corresponding MT holder. The optical fiber is located inside the MT holder. The PCB board 7 is connected to the laser array 3 and the detector array 4. The laser driver 5 is connected to the laser array 3, and the trans - impedance amplifier 6 is connected to the detector array 4.

[0074] When the module works, the laser driver at the transmitting end powers on the laser. The laser array 3 emits laser, converts the electrical signal into an optical signal, becomes collimated light through the first lens array 10 of the optical path coupling unit 2, reaches the reflector and is reflected, then reaches the second lens array 12, and becomes convergent light that converges to the optical fiber (the coupling uses an MT ferrule with an optical fiber, and the MT ferrule is removed after the coupling is cured). The light emitted from the optical fiber (the coupling uses an MT ferrule with an optical fiber, and the MT ferrule is removed after the coupling is cured) at the receiving end becomes collimated light through the second lens array 12, is reflected by the reflector and then reaches the first lens array 10 to become convergent light, which converges onto the detector array 4, converts the optical signal into a current signal. The detector and the trans - impedance amplifier 6 are connected by a wire - bonding process. The trans - impedance amplifier 6 mainly converts the current signal into a voltage signal. See Figures 11 to 12 .

[0075] Furthermore, the PCB board mainly functions to supply power to the driver and the trans - impedance amplifier, etc.

[0076] Furthermore, first, the laser can be a VCSEL, DFB, or other lasers suitable for optical communication. The spacing of the laser array 3 is 250um or other spacing.

[0077] Furthermore, the spacing of the detector array 4 is also 250um or other dimensional spacing.

[0078] Furthermore, the corresponding spacing between the first lens array 10 and the second lens array 12 is 250um or other dimensional intervals. The number of lenses in both the first lens array 10 and the second lens array 12 is 12. Among them, the middle 4 lenses are not used. The remaining 4 lenses on each side are respectively used for the laser array 3 and the detector array 4. Among them, the lens material is a glass material (fused quartz or other materials).

[0079] Furthermore, the lens array has a rectangular shape, and the reflector 9 is coated with a reflective film with a reflectivity greater than 98% at a reflection wavelength of 850 nm.

[0080] Furthermore, the reflector of the optical path coupling unit, the first lens array 10, the second lens array 12, and the support frame 8 can also be processed by injection molding in one piece. The injection molding material is optical plastic, such as PEI material or other optical injection molding materials.

[0081] Furthermore, the support frame 8 can also be processed by injection molding in one piece. The injection molding material is optical plastic, such as PEI material or other optical injection molding materials.

[0082] Furthermore, a metal frame 20 is provided between the MT mounting frame 13 and the housing 1. A metal optical window 21 corresponding to the MT mounting frame 13 is provided on the metal frame 20. See Figure 7 .

[0083] See Figures 2 to 3 , furthermore, in this embodiment, an MT limiter 14 is provided outside the MT holder 13 for limiting the MT fiber optic jumper. Specifically, it includes:

[0084] The MT holder includes an MT mounting frame 13. MT positioning posts 19 are provided inside the MT mounting frame 13, and the MT positioning posts 19 are used for assembling the MT fiber optic jumper.

[0085] Furthermore, a rotating shaft 15 and a limiting groove 16 are provided on the side wall of the MT mounting frame 13. A rotating hole 17 and a positioning protrusion 18 are provided on the MT limiter 14. During assembly, the rotating hole 17 is correspondingly connected to the rotating shaft 15. A limiting surface 28 is provided at one end of the MT limiter 14. When the MT limiter 14 rotates along the MT mounting frame 13 to be in a horizontal direction with the MT mounting frame 13, the positioning protrusion 18 is located in the limiting groove 16, and the inner side wall of the limiting surface abuts against the end of the MT head in the MT fiber optic jumper.

[0086] Furthermore, see Figure 4 , the structure of the MT fiber optic jumper is:

[0087] It includes an MT head 22. An MT positioning hole 23 is provided at the front end of the MT head 22. An optical fiber array end face 26 is provided at the front end of the MT head 22. The MT positioning hole 23 is adapted to an MT positioning post 24. The MT positioning post 24 is provided inside the MT mounting frame 13. The end of the MT head 25 is connected to an optical fiber array 27.

[0088] See Figures 5 to 6, when the MT limiter 14 fixes and limits the MT fiber optic jumper, rotate the MT limiter 14. When the limiting groove 16 on the MT limiter 14 abuts against the positioning protrusion 18, stop rotating the MT limiter 14. At this time, the MT limiter 14 is in a horizontal state, and the limiting surface 28 is located outside the MT head and tail end 25. The limiting surface 28 cooperates with the two side walls of the MT limiter to limit the MT fiber optic jumper and prevent the MT fiber optic jumper from moving.

[0089] This embodiment also discloses an assembly method for a tail - free optical module. During assembly, first attach components such as resistors and capacitors in the circuit to the PCB board, then attach the PCB board to the inner cavity of the housing. At the same time, paste and mount the laser array, detector array, laser driver chip, and transimpedance amplifier chip in the corresponding positions in the inner cavity of the housing, and connect them to each other through wire bond. Each sub - component of the optical path coupling unit is pre - bonded with glue in advance, and the optical window is welded to one side of the housing by welding. The MT fixer is installed on the MT mounting frame in advance.

[0090] Specifically, it includes:

[0091] During coupling, use a suction nozzle to pick up the upper surface of the optical path coupling unit. At the same time, insert the MT fiber optic jumper into the MT mounting frame 13. Align the MT positioning hole 23 with the MT positioning post 24 of the MT fixer and insert it. Rotate the MT fixer perpendicular to the optical path propagation direction to avoid the MT head 27 on the MT fiber optic jumper. The MT mounting frame 13 is pre - fixed on one side of the housing, and the MT limiter 14 is rotated perpendicular to the optical path propagation direction to avoid the MT head 22 on the MT fiber optic jumper.

[0092] Adjust the six - axis movement of the optical path coupling unit 2 to make the optical power of the jumper the maximum, then dot - glue and fix the optical path coupling unit 2 in the inner cavity of the housing. Then adjust the MT mounting frame 13 to make the optical power of the jumper the maximum, and then fix the MT mounting frame 13 on one side of the housing 1 by gluing or laser welding. After coupling, pull out the MT fiber optic jumper. The housing 1 and the cover plate 29 are sealed and welded through the parallel seam welding process, and the entire product assembly is completed.

[0093] When the user uses it, it can be adapted to MT jumpers of different lengths. When the user uses it, insert the MT fiber optic jumper into the MT mounting frame 13, align the MT positioning hole 23 and the MT positioning post 24 and insert them, and rotate the MT fixer downward by 90 degrees. The limiting surface 28 of the MT fixer restricts the MT head and tail end 25, so that the MT head 22 is fixed and locked in the fiber direction and will not move.

[0094] See Figures 11 to 12 , a usage method for a tail - free optical module according to an embodiment of the present invention includes the following steps:

[0095] Insert the MT fiber optic jumper into the MT fixer;

[0096] The laser array 3 transmits light to the first lens array 10;

[0097] The first lens array 10 converts the light into collimated light and then vertically transmits it upward to the reflector 9;

[0098] The reflector 9 transmits the collimated light horizontally to the second lens array 12;

[0099] The second lens array 12 converts the collimated light into convergent light and couples the convergent light into the MT fiber patch cord;

[0100] The MT fiber patch cord transmits light to the second lens array 12, and the second lens array 12 converts the light into collimated light and then transmits it to the reflector 9 and the first lens array 10 in sequence;

[0101] The first lens array 10 converts the collimated light into convergent light and converges it to the detector array 4, and the detector array 4 converts the optical signal into an electrical current signal.

[0102] The solution disclosed by the present invention is hermetically packaged and does not use metallized optical fibers, greatly reducing the cost of the optical module. And without using metallized optical fibers, there is no risk of leakage of welded optical fibers and damage to optical fibers, improving the reliability of the optical module.

[0103] The structure disclosed by the present invention does not need to use metallized optical fibers. When assembling the optical module, there is no need to customize optical fibers of different lengths, improving the assembly efficiency of the optical module. The optical module can pass through reflow soldering, which is extremely beneficial to users. And because it does not carry optical fibers, the airtightness detection can avoid interference caused by optical fibers.

[0104] The present invention uses an optical path coupling unit in a coupled manner, without the need to pass the optical fiber head through the elliptical mounting hole of the housing, and the coupling process is simple. The present invention is a pluggable optical interface, which is convenient for users to use. The structure can be disassembled and repaired, and has reparability.

[0105] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fiberless optical module, characterized in that, It includes a housing (1), and an optical path coupling unit (2), a laser array (3), a detector array (4), a laser driver (5), a transimpedance amplifier (6) and a PCB board (7) are arranged inside the housing (1); The optical path coupling unit (2) includes a support frame (8). A reflecting sheet (9) is arranged at one end of the support frame (8). A first lens array (10) is arranged below the reflecting sheet (9). A window (11) is opened at the end of the support frame (8) away from the reflecting sheet (9). A second lens array (12) is arranged at the window (11). The optical path is transmitted to the reflecting sheet (9) through the first lens array (10), reflected by the reflecting sheet (9) and then transmitted to the second lens array (12), and converges to the MT fiber optic patch cord through the window (11); A housing optical window corresponding to the window (11) is opened on the housing (1), and a corresponding MT holder is arranged outside the housing optical window, and the MT fiber optic patch cord is located inside the MT holder; The PCB board (7) is connected to the laser array (3) and the detector array (4), the laser driver (5) is connected to the laser array (3), and the transimpedance amplifier (6) is connected to the detector array (4).

2. The optical module without a pigtail according to claim 1, wherein The MT holder includes an MT mounting frame (13), and an MT positioning post (19) is arranged inside the MT mounting frame (13), and the MT positioning post (19) is used for assembling the MT fiber optic patch cord.

3. The optical module without optical fiber tails according to claim 2, characterized in that, An MT limiter (14) is arranged outside the MT mounting frame (13), and the MT limiter (14) can rotate along the MT mounting frame (13), and the MT limiter (14) is used for limiting the MT fiber optic patch cord.

4. The optical module without a pigtail according to claim 3, wherein, A rotating shaft (15) and a limiting groove (16) are opened on the side wall of the MT mounting frame (13), and a rotating hole (17) and a positioning protrusion (18) are opened on the MT limiter (14); The rotating hole (17) is correspondingly connected to the rotating shaft (15), and the positioning protrusion (18) cooperates with the limiting groove (16) to limit the MT fiber optic patch cord; A limiting surface is arranged at one end of the MT limiter (14). When the MT limiter (14) rotates along the MT mounting frame (13) to be in a horizontal direction with the MT mounting frame (13), the positioning protrusion (18) is located in the limiting groove (16), and the inner side wall of the limiting surface abuts against the end of the MT head in the MT fiber optic patch cord.

5. The optical module without a pigtail according to claim 2, characterized in that, A metal frame (20) is arranged between the MT mounting frame (13) and the housing (1), and a metal optical window (21) corresponding to the MT mounting frame (13) is opened on the metal frame (20).

6. The optical module without optical fiber tails according to claim 1, characterized in that, A reflecting film is plated on the reflecting sheet (9).

7. An assembling method for a tail - fiber - free optical module, characterized in that, It includes the following steps: Place the laser array (3), the detector array (4), the laser driver (5), the transimpedance amplifier (6) and the PCB board (7) at corresponding positions inside the housing (1); Assemble the MT holder to one side of the housing (1); Assemble the MT fiber optic patch cord inside the MT holder, adjust the position of the optical path coupling unit (2). When the current optical power of the MT fiber optic patch cord is the maximum, set the position where the current optical path coupling unit (2) is located as the optimal position, and fix the optical path coupling unit (2) to the optimal position; Adjust the position of the MT retainer according to the fixed optical path coupling unit (2). When the current optical power of the MT fiber patch cord shows the maximum, fix the MT retainer at the current position. Pull out the MT fiber patch cord, perform a sealing assembly on the housing (1), and complete the assembly.

8. The assembly method of a tailless fiber optic module according to claim 7, characterized in that The optical path coupling unit (2) is fixed by bonding or welding.

9. A method for using a fiberless optical module, characterized in that, It includes the following steps: Insert the MT fiber patch cord into the MT retainer. The laser array (3) transmits light to the first lens array (10). The first lens array (10) converts the light into collimated light and vertically transmits it upward to the reflector (9). The reflector (9) transmits the collimated light horizontally to the second lens array (12). The second lens array (12) converts the collimated light into convergent light and couples the convergent light into the MT fiber patch cord. The MT fiber patch cord transmits light to the second lens array (12). The second lens array (12) converts the light into collimated light and then transmits it to the reflector (9) and the first lens array (10) in sequence. The first lens array (10) converts the collimated light into convergent light and converges it to the detector array (4). The detector array (4) converts the optical signal into an electrical current signal.

10. The method of using a tail-free optical module according to claim 9, characterized in that, When inserting the MT fiber patch cord into the MT retainer, it further includes: The MT retainer includes an MT mounting frame (13). A rotating shaft (15) and a limiting groove (16) are provided on the side wall of the MT mounting frame (13). An MT limiter (14) is arranged outside the MT mounting frame (13). A rotating hole (17) and a positioning protrusion (18) are provided on the MT limiter (14). One end of the MT limiter (14) is provided with a limiting surface. The rotating hole (17) is correspondingly connected to the rotating shaft (15). When inserting the MT fiber patch cord, rotate the MT limiter (14) upward. After inserting the MT fiber patch cord, rotate the MT limiter (14) downward until the MT limiter (14) is in a horizontal state. At this time, the positioning protrusion (18) is located in the limiting groove (16), and the inner side wall of the limiting surface abuts against the end of the MT head in the MT fiber patch cord.

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