TWI498621B - Receiving optical sub-assembly and manufacture method thereof - Google Patents

Description

Light receiving sub-assembly and manufacturing method thereof

The present invention relates to an optical communication component, and more particularly to a receiving optical sub-assembly (ROSA).

Fiber optics is now widely used as the primary transmission tool for network systems in many countries around the world. Since the optical fiber is transmitted by total reflection of light, the optical fiber has characteristics of high speed transmission and low transmission loss. When an optical fiber is used as a transmission medium for a network system, the optical fiber has characteristics of wide frequency, high capacity, and high speed.

In the current situation of increasing information transmission and users requiring faster network requirements, the amount of data transmitted by optical fibers has gradually become insufficient. In order to cope with the problem of insufficient data transmission, in addition to improving the fiber transmission speed, the reception and transmission of both ends of the fiber are also very important. The current light receiving sub-assembly disposed at the fiber receiving end can increase the amount of received transmission data, but the light receiving sub-assembly has a large volume, so that other devices connected to the light receiving sub-assembly must cooperate with the light receiving time. The assembly produces a larger receiving aperture, which in turn occupies a larger volume and thus loses the small size of the fiber.

Furthermore, in the quality test after the manufacture of the light receiving sub-assembly, if the failure of the light receiving sub-assembly test fails, the cause of the manufacturing failure is not further clarified. Improvements will make it impossible to increase manufacturing yields and reduce manufacturing costs.

In addition, the conventional light receiving sub-assembly is manufactured by first inputting a light beam from the light receiving sub-assembly input end, and then determining whether the light receiving sub-assembly is in the correct position from the light sensing element outputting the sensing signal. . However, during the determination of whether the light sensing element has an output sensing signal, the light beam may pass through a plurality of components, and each of the components may be incorrectly assembled, causing the light sensing component not to receive the light beam. It is not easy to find the reason why the beam is not transmitted correctly.

In view of the problem of large size of the current light receiving sub-assembly, an embodiment of the present invention provides a large number of signals that can not only receive the optical fiber, but also can miniaturize the light receiving sub-assembly. In addition, in view of the problem that the manufacturing yield of the light receiving sub-assembly cannot be improved, another embodiment of the present invention provides a light receiving sub-assembly that can confirm the cause of manufacturing failure, so that the light receiving sub-assembly can be solved according to the failure reason during manufacture. Problems, which in turn increase manufacturing yield. An embodiment of the present invention provides a method for fabricating a light receiving sub-assembly, by replacing the center point of the exit end of the lens array with the center point of the light sensing element, instead of inputting the light beam from the input end of the light receiving sub-assembly. To improve the efficiency of manufacturing the light receiving sub-module by testing whether the beam is coupled to the light sensing element.

The present invention provides a light receiving subassembly having a housing, a substrate, a fiber optic socket, a lens, a light sensing element, an optical waveguide element, and a lens array, wherein the substrate is disposed within the housing. An optical waveguide element and a plurality of photo sensing elements are disposed on the substrate. optical fiber The socket is disposed on a side of the housing and has a first end and a second end. The lens is disposed within the housing adjacent to the second end. The optical waveguide component is located between the lens and the light sensing component, has an input end and a plurality of output ends, and the output ends are located above the light sensing component. The lens array is disposed above the light sensing element and adjacent to the optical waveguide component, having an incident end, a reflecting surface and an emitting end, wherein the incident end is aligned with the output end of the optical waveguide component, and the emitting end is aligned with the light sensing component. When the first end receives the fiber and directs the first beam to the second end by the fiber, the lens focuses the first beam output from the second end to the input. The optical waveguide component disperses the first light beam into a plurality of second light beams according to the received first light beam wavelength, and outputs the second light beam from the second end to the incident end. The reflecting surface turns the second beam entering the incident end toward the exit end, and the output end is output to the light sensing element.

In an embodiment of the invention, the lens array comprises an incident lens and an exit lens. The incident lens is disposed at the incident end, and the exit lens is disposed at the exit end. The incident lens is configured to receive the second light beam outputted from the output end, and focus the second light beam to the reflective surface. The exit lens is used to focus the second beam reflected by the reflective surface to the light sensing element.

In another embodiment of the invention, the lens array further includes an incident surface and an exit surface. The incident end is on the incident surface and the exit end is on the exit surface. The normal direction of the incident surface is 90 degrees from the normal direction of the exit surface, and the angle between the normal direction of the exit surface and the reflective surface is 45 degrees, so that the second beam entering the incident end can be totally reflected to the exit surface by the reflective surface. The direction of the end is output by the exit end.

In still another embodiment of the present invention, the lens array further includes at least one light guiding groove, wherein the optical guiding groove is provided with an optical fiber, and the third light beam is coupled to the light sensing component by the optical fiber to detect whether the lens array has Set it appropriately.

The present invention provides a light receiving subassembly manufacturing method, the method comprising the steps of combining a plurality of light sensing elements and optical waveguide elements onto a substrate and combining the substrates to an inner bottom of the housing. The exit end center point of the lens array is aligned with the center point of the light sensing element, and the incident end of the lens array is aligned with the output end of the optical waveguide element. The aligned lens array is fixed to the optical waveguide component. Next, the lens is secured adjacent the input end of the optical waveguide component to enable the lens to focus the first beam onto the input end of the optical waveguide component. The fiber optic socket is disposed on the side of the casing, so that the fiber optic socket couples the alignment beam to the lens, and fixes the fiber optic socket to the casing.

In an embodiment of the invention, the step of combining the light sensing element and the optical waveguide component onto the substrate and combining the substrate to the bottom of the housing includes disposing the first positioning image on the substrate. The first positioning image includes a position where the light sensing element is disposed and a position where the optical waveguide element is disposed. Positioning the light sensing element and the optical waveguide component on the substrate according to the position of the light sensing element and the setting position of the optical waveguide component displayed on the first positioning image, and then fixing the light sensing component and the optical waveguide component on the substrate .

In an embodiment of the invention, the step of combining the light sensing element and the optical waveguide component onto the substrate and combining the substrate into the bottom of the housing further comprises soldering one end of the plurality of first metal members to the resistance An amplifier, and soldering the other end of the first metal member to the light sensing element, soldering one end of the second metal member to the substrate, and soldering the other end of the second metal member to the terminal of the housing, wherein the terminal is The inside of the housing extends outside the housing.

In summary, the optical receiving sub-assembly proposed by an embodiment of the present invention, The output end of the optical waveguide component and the lens array are both located above the photo sensing element. The lens array deflects the beam entering from the incident end toward the exit end by the reflecting surface, so that the beam can be reflected or totally reflected to change the direction of transmission, so that the light sensing element can be received under the lens array and the optical waveguide component. The light beam, so that the length of the light receiving sub-assembly is shortened, and the overall volume is also reduced. In one embodiment, by providing a light guiding groove on the lens array, when the light receiving sub-assembly performs detection, it can confirm the problem of manufacturing failure when the light receiving sub-assembly fails to be detected, thereby improving and improving. Create yield. A method for manufacturing a light receiving sub-assembly according to another embodiment of the present invention is to replace the input from the light receiving sub-assembly input point by directly aligning the center point of the exit end of the lens array with the center point of the light sensing element. The beam, in order to test whether the beam is coupled to the light sensing element, makes the manufacturing method of the light receiving sub-assembly of the present invention faster and more efficient.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

10‧‧‧shell

101‧‧‧ terminals

103‧‧‧Outside

105‧‧‧ bottom bottom

20‧‧‧Substrate

30‧‧‧Fiber socket

301‧‧‧ first end

303‧‧‧ second end

40‧‧‧ lens

401‧‧‧ Third Positioning Image

50‧‧‧Light sensing components

501, 605, 901 ‧ ‧ set location

60‧‧‧ Optical waveguide components

601‧‧‧ input

603‧‧‧output

70‧‧‧ lens array

701‧‧‧Injected end

703‧‧‧reflecting surface

705‧‧‧Outlet

707‧‧‧Incoming surface

709‧‧‧Outlet

711‧‧‧Injecting lens

713‧‧‧Output lens

715‧‧‧Light guide

717‧‧‧ outside side

719‧‧‧ bottom

80‧‧‧ fiber optic

90‧‧‧Transistor Amplifier

901‧‧‧Second positioning image

1 is a perspective view of a light receiving subassembly drawn in accordance with an embodiment of the present invention.

2 is a top plan view of a light receiving subassembly drawn in accordance with an embodiment of the present invention.

Figure 3 is the side of the light receiving subassembly drawn according to Figure 2-3-3 View the section.

Figure 4 is a side cross-sectional view of the lens array taken in accordance with the line of Figure 2-3.

Figure 5 is a bottom plan view of a lens array drawn in accordance with an embodiment of the present invention.

Figure 6 is a flow diagram of a method of fabricating a light receiving subassembly, in accordance with an embodiment of the present invention.

FIG. 7 is a schematic diagram of a first positioning image drawn on a substrate according to an embodiment of the invention.

Figure 8 is a flow diagram of a combined light sensing element and optical waveguide component on a substrate, in accordance with an embodiment of the present invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention. In the embodiment of the present invention, when the terms above or above are used in the specification, they actually refer to different positional relationships. For example, if the light sensing element is located on the substrate, it means that the light sensing element is located on the substrate and is in contact with the substrate. Another example is that the output end is above the light sensing element, meaning that the level of the output end is higher than the level of the light sensing element, but the output end is not necessarily related to the light sensing element. Have contact.

Referring to FIG. 1 , FIG. 2 and FIG. 3 together, FIG. 1 is a perspective view of a light receiving sub-assembly according to an embodiment of the present invention, and FIG. 2 is an embodiment of the present invention. A top view of the light receiving sub-assembly drawn, and FIG. 3 is a side cross-sectional view of the light receiving sub-assembly drawn according to the line of FIG. 2-3. As shown, a light receiving subassembly includes a housing 10, a substrate 20, a fiber optic receptacle 30, a lens 40, a light sensing component 50, an optical waveguide component 60, and a lens array 70, wherein the fiber optic receptacle 30 is disposed in the housing. The outer side surface 103 of the 10, the substrate 20 and the lens 40 are disposed in the casing 10, and the light sensing element 50 and the optical waveguide element 60 are disposed on the substrate 20. The lens 40 is located between the fiber optic receptacle 30 and the optical waveguide component 60. One end of the optical waveguide element 60 is adjacent to the lens 40 and the other end is adjacent to the photo sensing element 50. The lens array 70 is positioned above the light sensing element 50 adjacent to the optical waveguide element 60.

The housing 10 of the light receiving subassembly can be used to protect components disposed inside the housing 10 and to secure the fiber optic socket 30. The housing 10 is provided with at least one terminal 101. One end of the terminal 101 is coupled to the substrate 20, and the other end extends outside the housing 10 for coupling components in the housing 10 to the device outside the housing 10. The terminal 101 supplies power to the components in the housing 10, or the terminal 101 transmits signals generated by the components in the housing 10 to the outside of the housing 10.

The substrate 20 has a main substrate and a sub-substrate (not shown). The material of the substrate 20 may be a material having an insulating and/or heat-dissipating effect, such as aluminum nitride, tantalum or other ceramic materials. The main substrate is located on the sub-substrate, and the sub-substrate is adjacent to the inner bottom 105 of the housing 10. The light sensing element 50 and the optical waveguide element 60 are provided on the main substrate. Main substrate There is a conductive signal transmission line, for example, for electrically coupling the light sensing element 50 or other components disposed on the main substrate.

The fiber optic socket 30 has a first end 301 and a second end 303. The first end 301 is a female base composed of a ceramic sleeve for receiving and fixing an external fiber optic connector (not shown). The second end 303 is a fiber stub composed of a ceramic ferrule and a bare fiber. The bare fiber is inserted into the ceramic ferrule and fixed by a colloid. It is ground and polished to the same surface as the fiber optic connector. When the external fiber optic connector is inserted into the fiber optic socket 30, the fiber optic connector is guided and fixed to the ceramic sleeve of the first end 301 of the fiber optic socket 30. The fiber inside the fiber optic connector and the fiber in the fiber stub are touched by the end faces. . When the fiber optic connector transfers the first beam to the bare fiber of the fiber stub by the internal fiber, the bare fiber transmits the first beam into the housing 10.

The lens 40 in the housing 10 is adjacent to the second end 303 of the fiber optic receptacle 30 for receiving the first beam transmitted by the bare fiber and focusing the first beam transmitted by the bare fiber to the input end 601 of the optical waveguide component 60. . The lens 40 can be, but is not limited to, an aspherical lens 40 that can be used to receive the first beam and focus the first beam onto the focus of the lens 40, wherein the position of the focus of the lens 40 is the input of the optical waveguide component 60. End 601.

The optical waveguide component 60 is adjacent to the lens 40 and has an input end 601 on the opposite side and a plurality of output ends 603. The input end 601 is adjacent to the lens 40, and the first light beam outputted by the second end 303 is received by the lens 40. Setting bit of input 601 The placement may be at a focus of the lens 40, and the distance of the input 601 from the lens 40 may be within a range of the distance of focus of the lens 40 or the distance of the focus. The present invention does not limit the distance of the input end 601 from the lens 40. The optical waveguide component 60 can disperse the first light beam into a plurality of second light beams according to the wavelength of the first light beam received at the input end 601, and output the plurality of second light beams by the plurality of output ends 603, as shown in FIG. The output 603 of the optical waveguide component 60 is disposed at a position above the photo sensing element 50. In other words, when the substrate 20 is used as a horizontal plane, the horizontal position of the output end 603 of the optical waveguide element 60 is higher than the horizontal position of the photo sensing element 50.

The horizontal position of the lens array 70 and the output end 603 of the optical waveguide component 60 is also higher than the horizontal position of the photo-sensing element 50, that is, above the photo-sensing element 50, adjacent to the optical waveguide component 60. The lens array 70 has a plurality of incident ends 701, a reflective surface 703, and a plurality of exit ends 705. The incident ends 701 are respectively aligned with the output ends 603 of the optical waveguide elements 60, and the exit ends 705 are respectively aligned with the light sensing elements 50. The reflecting surface 703 is located between the incident end 701 and the exit end 705 for rotating the second beam entering the incident end 701 toward the exit end 705.

In the embodiment of the present invention, the light receiving sub-assembly may further include a Transimpedance Amplifier (TIA) 90. The transimpedance amplifier 90 is disposed on the substrate 20 adjacent to the photo sensing element 50 and coupled to the light. Sensing element 50. The transimpedance amplifier 90 is configured to receive a current generated by the photo sensing element 50 after sensing the second beam, and convert it into a voltage signal. The terminal 101 of the housing 10 also has at least one terminal 101 coupled to the transimpedance amplifier 90 for outputting the converted voltage signal of the transimpedance amplifier 90 to the outside of the housing 10.

The first light beam received by the light receiving sub-assembly is actually received by one end of the optical fiber connector, and the optical pulse is transmitted to the light receiving sub-assembly of the embodiment by the optical fiber inside the optical fiber connector. The light sensing element 50 that receives the secondary component performs analysis of the light pulse. The operation of the light receiving unit to receive the first light beam will be described below.

As shown in FIG. 3, after the fiber stub of the second end 303 of the fiber optic receptacle 30 directs the first beam to the lens 40, the lens 40 receives the first beam and focuses the first beam onto the optical waveguide component 60. Input 601. The first light beam is dispersed by the optical waveguide element 60 into a plurality of second light beams depending on the wavelength. For example, each of the second beams has a different wavelength in this embodiment. The second light beam is output from the output end 603 of the optical waveguide element 60 and directed to the incident end 701 of the lens array 70. The incident end 701 receives the second light beam and projects the second light beam onto the reflective surface 703. The reflecting surface 703 reflects the second light beam toward the exit end 705 by the principle of light reflection. The second light beam is emitted from the exit end 705 and projected onto the light sensing element 50. The light sensing component 50 generates a corresponding current signal according to the received second light beam. The current signal is output to the transimpedance amplifier 90, and the current signal is converted into a voltage signal by the transimpedance amplifier 90, and finally output to the outside of the casing 10 via the terminal 101 on the casing 10.

The light receiving sub-assembly mainly reflects the second light beam by the reflecting surface 703 of the lens array 70, so that the light sensing element 50 can be disposed under the lens array 70, reducing the volume of the light receiving sub-assembly as a whole. . The number of the light receiving sub-assembly setting lens array 70 is not limited, and the number of the emitting end 705 and the incident end 701 on the lens array 70 is also not limited. However, regardless of the lens array 70 The number of the output end 705 and the incident end 701 is set on the number or one lens array 70, and the number of the output end 705 and the incident end 701 is equal to the number of the output ends 603 of the optical waveguide element 60. In other words, in the case where the optical waveguide component 60 has four output terminals 603, the light receiving subassembly may have one lens array 70, and the lens array 70 has four incident ends 701 and four exit ends 705, as shown in the figure. . The light receiving subassembly may also have two lens arrays 70, and each lens array 70 has two exit ends 705 and two exit ends 705, respectively.

Referring to FIG. 4 and FIG. 5 together, FIG. 4 is a side cross-sectional view of the lens array according to the second FIG. 3-3, and FIG. 5 is an embodiment according to the present invention. A bottom view of the drawn lens array. As shown, the lens array 70 further includes an incident surface 707, an exit surface 709, an incident lens 711, and an exit lens 713. The incident end 701 is located on the incident surface 707, and the exit end 705 is located on the exit surface 709. In the embodiment of the present invention, the normal direction of the incident surface 707 and the normal direction of the exit surface 709 are 90 degrees, and the normal direction of the exit surface 709 and the angle of the reflective surface 703 are 45 degrees. Therefore, when the second beam enters the lens array 70 from the incident surface 707, the incident angle of the second beam is 45 degrees. After being reflected by the reflecting surface, the second light beam is output toward the exit end 705 in a direction of 45 degrees of the exit angle. When the incident angle and the exit angle of the second beam are 45 degrees, the reflection of the second beam can achieve the effect of total reflection. In other words, the second beam can be totally reflected and outputted by the output terminal 603, and there will be no part. The second light beam is refracted on the reflecting surface 703 to disperse a portion of the second light beam, but the present invention does not limit the incident angle of the second light beam to 45 degrees.

On the incident surface 707, the position at each incident end 701 is set. An incident lens 711 is disposed to focus the second light beam outputted from the output end 603 of the optical waveguide component 60, and focus the second light beam onto the reflective surface 703 so that the second light beam can be more accurately projected onto the reflective surface 703, and Reflected by the reflecting surface 703.

On the exit surface 709, an exit lens 713 is disposed at each of the exit ends 705 for focusing the second light beam reflected by the reflective surface 703 to the light sensing element 50. The light sensing element 50 can be disposed at the focus of the exit lens 713 such that when the second light beam is output from the exit end 705, it can be focused on the light sensing element 50. Further, the center point of the exit end 705 is aligned with the center point of the light sensing element 50, that is, the center point of the exit lens 713 is aligned with the center point of the light sensing element 50. Aligning the center point of the exit end 705 with the center point of the light sensing element 50, in addition to determining that the second light beam output from the output end 705 can be guided to the light sensing element 50, is also detailed for ease of processing. .

For the convenience of detection, the light receiving sub-assembly is further provided with at least one light guiding groove 715 on the lens array 70, as shown in the two light guiding grooves 715. One end of the light guiding groove 715 is located at the outer side surface 717 of the lens array 70, and the other end opening is located at the bottom 719 of the lens array 70, facing the light sensing element 50. Since the light guiding groove 715 and the emitting end 705 are the same structure in the lens array 70. Compared with the light guide groove 715 and the exit end 705 are disposed on two different components, the light guide groove 715 and the exit end 705 are easier to control the process variables on the same component, so that the extension line of the exit end 705 is The extension line of the light guiding groove 715 can be located at the same fixed point, and the center point of the light sensing element is aligned with the fixed point setting. When it is detected that the light receiving sub-assembly cannot operate normally, another detecting optical fiber may be additionally disposed along the light guiding groove 715. The third light beam (ie, the light beam used for detection) is guided from the outer side surface 717 of the lens array 70 to the light sensing element 50 (ie, the fixed position) by the optical fiber in the light guiding groove, and the light sensing element 50 is detected. Is there a signal output? If the light sensing element 50 has a signal output, indicating that the lens array 70 is properly mounted, it is possible that the lens 40 does not focus the beam onto the input 601. If the light sensing element 50 has no signal output, it indicates that the lens array 70 may not be properly mounted, and the lens array 70 needs to be reinstalled.

Referring to FIG. 3 and FIG. 6 together, FIG. 6 is a flowchart of a method for manufacturing a light receiving sub-assembly according to an embodiment of the present invention. As shown in the figure, in step S20, multiple The light sensing element 50 and the optical waveguide element 60 are combined onto the substrate 20 and the substrate 20 is combined to the inner bottom 105 of the housing 10. In this embodiment, combining the light sensing component 50 and the optical waveguide component 60 onto the substrate 20 includes aligning the light sensing component 50 with the optical waveguide component 60 at a predetermined position, and sensing the light. The element 50 is adhered to the substrate 20 and the optical waveguide element 60. The bonding method may be that the colloid is first disposed on the substrate 20 or the photo sensing element 50 and the optical waveguide component 60, and then the colloid is cured by light, and the photo sensing element 50 and the optical waveguide component 60 are fixed by the curing of the colloid. Substrate 20.

In step S22, the center point of the exit end 705 of the lens array 70 is aligned with the center point of the light sensing element 50, and the incident end 701 of the lens array 70 is aligned with the output end 603 of the optical waveguide element 60. For example, a beam is projected from each of the center points of the exit end 705 of the lens array 70, and then the beam output from the exit end 705 is aligned to the center point of the photo sensing element 50 to complete the exit end of the lens array 70. The center point of the 705 is aligned with the center point of the light sensing element 50, but is not limited thereto. While the incident end 701 of the lens array 70 is aligned with the output end 603 of the optical waveguide component 60, the position of the incident end 701 of the lens array 70 can be set relative to the position of the output end 603 when the lens array 70 is manufactured. According to the manner in which the lens array 70 is manufactured, four incident ends 701 and an exit end 705 are disposed on one lens array 70. When one of the incident ends 701 of the lens array 70 is aligned with the output end 603 of an optical waveguide element 60, The incident end 701 of the other lens array 70 is aligned with the output 603 of the optical waveguide component 60. Or, when the light sensing element 50 and the optical waveguide element 60 are in step S20, the light sensing element 50 and the optical waveguide element 60 have been properly fixed at the preset position, and thus the center point pair of the exit end 705 of the lens array 70 is After the center point of the quasi-light sensing element 50, the incident end 701 of the lens array 70 can be aligned to the output end 603 of the optical waveguide component 60.

In step S24, the aligned lens array 70 is fixed to the optical waveguide element 60. The manner in which the lens array 70 is fixed may be applied with a colloid at a predetermined adhesive position before or after the alignment lens array 70 in step S22, and then the colloid is irradiated with light to cure the colloid. The light used to cure the colloid can be, but is not limited to, ultraviolet light.

Next, lens 40 is secured adjacent input 601 of optical waveguide component 60 in step S26 to enable lens 40 to focus the first beam onto input 601 of optical waveguide component 60. For example, the focal length of the lens 40 can be measured in advance, so that the alignment mark (Alignment) can be marked at the focal length of the front end of the input end 601 of the optical waveguide component 60 in accordance with the focal length of the lens 40 in the substrate 20 or the bottom portion 105 of the housing 10. Mark), alignment marks can be, but are not limited to, lithography (Photolithography) way. The lens 40 is disposed in front of the optical waveguide element 60 in accordance with the alignment mark. Another way of fixing the lens 40 is that the optical fiber 80 can project a first light beam from the front of the lens 40, and the first light beam focused by the lens 40 can be aligned with the input end 601 of the optical waveguide component 60 by means of coupling coupling, and the light sensation can be tested. The signal of component 50 is measured to determine the location of lens 40.

In step S28, the fiber optic socket 30 is disposed on the outer side 103 of the housing 10 such that the fiber optic socket 30 couples the alignment beam to the lens 40. For example, after the lens 40, the lens array 70, the optical waveguide component 60, the light sensing component 50, and the substrate 20 are all fixedly disposed in the housing 10, the optical fiber connector is fixed through the optical fiber socket 30 outside the housing 10. Projecting a aligning beam having a specific wavelength from the other end of the fiber optic connector, and sequentially aligning the aligning beam through the lens 40, the optical waveguide component 60, and the lens array 70, and coupling the light to the photo sensing component 50 to make the light sensation The measuring element 50 produces a current signal corresponding to the alignment beam. Whether the current signal generated from the light sensing element 50 has a specific wavelength corresponding to the alignment beam is checked to see if the fiber optic socket 30 is placed in the proper position. If the light sensing component 50 does not generate a current signal corresponding to a specific wavelength, the fiber socket 30 is adjusted in a one-dimensional, two-dimensional or three-dimensional movement or rotation until the light sensing component 50 generates a current signal corresponding to a specific wavelength. Indicates that the fiber optic jack 30 is in place.

Thereafter, in step S29, the fiber optic socket 30 is fixed to the casing 10. The manner in which the fiber optic receptacle 30 is secured may, but is not limited to, the use of pulsed laser welding to secure the fiber optic receptacle 30 to the housing 10.

In order to explain in the foregoing step S20 in more detail, a plurality of light sensing For the step of combining the element 50 and the optical waveguide element 60 onto the substrate 20 and combining the substrate 20 to the inner bottom portion 105 of the casing 10, please refer to FIG. 7 and FIG. 8 together. FIG. 7 is a diagram according to the present invention. The first positioning image drawn by the embodiment is disposed on the substrate 20, and FIG. 8 is a flow chart of the combined light sensing element 50 and the optical waveguide component 60 on the substrate 20 according to an embodiment of the invention. As shown in the figure, in step S201, a first positioning image is disposed on the substrate 20. The first positioning image includes the set position of the light sensing element 50 and the set position of the optical waveguide element 60. The method of setting the first positioning image may be to project the first positioning image on the substrate 20 or lithographically display the position of the light sensing element 50 and the optical waveguide element 60 on the substrate 20, as shown in FIG. In this example, the first positioning image includes the position where the light sensing element 50 is disposed and the position of the optical waveguide component 60. However, the position of the light sensing element 50 and the position of the optical waveguide component 60 can also be displayed separately. The positioning images are fixed to the substrate 20 in two separate steps. In other words, the light sensing elements 50 and the optical waveguide elements 60 can be disposed separately or together on the substrate 20.

In step S203, the light sensing element 50 and the optical waveguide element 60 are positioned on the substrate 20 according to the installation position of the light sensing element 50 and the installation positions 501 and 605 of the optical waveguide element 60 displayed by the first positioning image. For example, the light sensing element 50 and the optical waveguide element 60 are positioned on the substrate 20 in accordance with the projected first positioning image or the lithographic alignment mark.

Next, in step S205, the photo sensing element 50 and the optical waveguide element 60 are fixed on the substrate 20. The light sensing element 50 and the optical waveguide element 60 are not limited Fixed order. For example, after fixing the light sensing element 50 and then fixing the optical waveguide element 60, first, a first type of colloid is applied on the contact surface of the photo sensing element 50 and the substrate 20, and the photo sensing element 50 is placed on the contact surface. After the proper position, the first colloid is cured. Next, a second colloid is applied to the contact surface of the optical waveguide element 60 and the substrate 20, and the optical waveguide element 60 is appropriately placed, and then the second colloid is cured to fix the optical waveguide element 60 to the substrate 20.

After the positions of the optical sensing element 50 and the optical waveguide element 60 are fixed, an operation of electrically coupling the photo sensing element 50 is then performed. In step S207, one ends of the plurality of first metal members are soldered to the transimpedance amplifier 90, and the other ends of the first metal members are soldered to the photo sensing elements 50, respectively. The first metal member is coupled to the transimpedance amplifier 90 and the photo sensing element 50 respectively, so that the signal generated by the photo sensing element 50 can be transmitted to the transimpedance amplifier 90, and the signal is converted and amplified by the transimpedance amplifier 90.

In step S209, one end of the second metal member is welded to the substrate 20, and the other end of the second metal member is welded to the terminal 101 of the housing 10, wherein the terminal 101 extends from the inside of the housing 10 to the outside of the housing 10. For example, when the light sensing element 50 and the transimpedance amplifier 90 or other components disposed on the substrate 20 are disposed on the substrate 20, they are also coupled to the substrate 20, and then the substrate 20 and the terminal 10 of the housing 10 are Soldering, the power supply external to the housing 10 is transferred into the housing 10 for supply to the light sensing element 50 and the transimpedance amplifier 90 or other components on the substrate 20. Of course, the components of the light sensing component 50 and the transimpedance amplifier 90 or other substrate 20 may also be directly coupled to the terminal 101 of the housing 10 without passing through the substrate 20 . The housing 10 has a plurality of terminals 101, Each terminal 101 can be used to transmit a different signal. For example, the power supply or at least one terminal 101 is coupled to the transimpedance amplifier 90 for transmitting the signal generated by the transimpedance amplifier 90 to the outside of the housing 10.

While the embodiments of the present invention have been described herein, it is to be understood that It will be apparent to those skilled in the art that various changes in form and detail may be made to the embodiments without departing from the spirit of the invention.

For example, the step of fixing the transimpedance amplifier 90 on the substrate 20 and the step S26 of FIG. 6 to fix the lens 40 to the input end 601 adjacent to the optical waveguide component 60 may also be as shown in step S201 to S203 of FIG. The second positioning image is respectively disposed on the substrate 20 and the third positioning image is disposed on the substrate 20 or the bottom portion 105 of the casing 10. The transimpedance amplifier 90 and the lens 40 are respectively configured according to the second positioning image 901 and the third positioning. The image 401 is aligned and fixed to the bottom portion 105 of the substrate 20 or the housing 10 as shown in FIG.

In summary, the light receiving sub-assembly proposed by the present invention is configured such that the incident end of the lens array is aligned with the output end of the optical waveguide component, so that the incident end receives the light beam outputted from the output end, and the light beam can be reflected by the reflective surface. Or a total reflection and turning toward the exit end, and coupling the light beam to the light sensing element below the lens array and the optical waveguide element. Thereby, the length of the light receiving sub-assembly is shortened, and the overall volume of the light receiving sub-assembly is reduced. In an embodiment in which the lens array has a light guiding groove, the light receiving sub-assembly that fails the detection can project a test beam from the optical fiber in the light guiding groove by placing an optical fiber in the light guiding groove, and confirm whether the lens array or the lens has an appropriate shape. Be safe Install and reinstall the lens array or lens to increase manufacturing yield. The method for manufacturing the light receiving sub-assembly proposed by the present invention can make the lens array easier to align with the light sensing component by directly aligning the center point of the exit end of the lens array with the center point of the light sensing component. It is known that the light input sub-assembly input beam is input to test whether the light beam is coupled to the light sensing element, so that the manufacturing method of the light receiving sub-assembly of the present invention is faster and more efficient.

Although the present invention has been disclosed above in the above embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

10‧‧‧shell

101‧‧‧ terminals

103‧‧‧Outside

105‧‧‧ bottom bottom

20‧‧‧Substrate

30‧‧‧Fiber socket

301‧‧‧ first end

303‧‧‧ second end

40‧‧‧ lens

60‧‧‧ Optical waveguide components

601‧‧‧ input

70‧‧‧ lens array

Claims (12)

A light receiving sub-assembly includes: a casing; a substrate disposed in the casing; a fiber optic socket disposed on a side of the casing, the fiber optic socket including a first end and a second end, the One end for receiving an optical fiber for transmitting a first light beam and guiding the first light beam to the second end; a lens disposed in the housing and adjacent to the second end; An optical sensing component is disposed on the substrate; an optical waveguide component is disposed on the substrate between the lens and the photo sensing components, the optical waveguide component comprising an input end and a plurality of output ends The lens is configured to focus the first light beam outputted from the second end to the input end, and the optical waveguide component is configured to receive the first light beam received by the input end according to the wavelength of the first light beam received by the input end Dispersing into a plurality of second light beams, and outputting the second light beams from the second end outputs from the output ends, the output ends being located above the light sensing elements; and at least one lens array Above the light sensing elements, adjacent to the light a guiding element, the lens array comprising at least one incident end, a reflecting surface and at least one emitting end, each of the incident ends being aligned with one of the output ends of the optical waveguide component, each of the emitting ends being aligned One of the light sensing elements, the reflecting surface is configured to turn the second light beams entering the incident end toward To the exit end. The light receiving sub-assembly of claim 1, wherein the lens array further comprises an incident lens disposed at one of the incident ends, the incident lens for receiving the second light beam outputted by one of the output terminals And focusing the second light beam to the reflective surface. The light receiving subassembly of claim 1, wherein the lens array further comprises an exit lens disposed at one of the exit ends, the exit lens for focusing the second light beam reflected by the reflective surface to the One of the light sensing elements. The light receiving subassembly of claim 1, wherein a center point of each of the light sensing elements is aligned with a center point of each of the exit ends. The light receiving sub-assembly of claim 1, wherein the lens array comprises an incident surface and an exit surface, wherein the incident ends are located on the incident surface, and the exit ends are located on the exit surface, the incident surface method The line direction is at an angle of 90 degrees to the normal direction of the exit surface, and the normal direction of the exit surface is 45 degrees from the reflection surface. The light receiving sub-assembly of claim 1, wherein the lens array further comprises at least one light guiding groove, wherein each of the light guiding grooves is inserted with an optical fiber, and the optical fiber is used to couple a third light beam to the Light sensing component. The light receiving sub-assembly of claim 1, further comprising a transimpedance amplifier disposed on the substrate and coupled to the photo sensing elements. A method for manufacturing a light receiving subassembly, comprising: Combining a plurality of light sensing elements and an optical waveguide component onto a substrate, and combining the substrate to an inner bottom of a casing; aligning a center point of each of the exit ends of a lens array with the light sensing a center point of the element, and each incident end of the lens array is aligned with each output end of the optical waveguide element; the aligned lens array is fixed on the optical waveguide element; and a lens is fixed adjacent to the optical waveguide element An input end of the lens capable of focusing a first beam to the input end of the optical waveguide component; a fiber optic socket disposed on a side of the housing, the fiber optic socket coupling a pair of beam to the a lens; and fixing the fiber optic socket to the housing. The light receiving subassembly manufacturing method according to claim 8, wherein the step of combining the photo sensing elements and the optical waveguide element onto the substrate and combining the substrate into the bottom of the housing comprises: setting a first positioning image is disposed on the substrate, the first positioning image includes a position where the light sensing elements are disposed, and a position where the optical waveguide component is disposed; and the light sensing elements are displayed according to the first positioning image Positioning the position of the optical waveguide component, positioning the light sensing component and the optical waveguide component on the substrate; and fixing the light sensing component and the optical waveguide component on the substrate. The light receiving subassembly manufacturing method according to claim 8, further comprising: Setting a second positioning image on the substrate, the second positioning image includes a setting position of a transimpedance amplifier; and positioning the transimpedance amplifier according to the set position of the transimpedance amplifier displayed by the second positioning image On the substrate; and fixing the transimpedance amplifier on the substrate. The light receiving subassembly manufacturing method of claim 10, wherein the step of combining the light sensing elements and the optical waveguide component onto the substrate and combining the substrate into the bottom of the housing further comprises: Solding one end of the plurality of first metal members to the transimpedance amplifier, and soldering the other ends of the first metal members to the photo sensing elements; and soldering one end of the second metal member to the substrate And soldering the other end of the second metal member to a terminal of the housing, the terminal extending from the inside of the housing to the outside of the housing. The method of manufacturing the sub-assembly of the light receiving device of claim 8, wherein the step of fixing the lens comprises: setting a third positioning image on the substrate, the third positioning image comprising a setting position of the lens; Positioning the lens displayed by the three positioning images, positioning the lens on the substrate; and fixing the lens on the substrate.