JP2012163903A - Optical communication module and optical coupling member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical communication module that has a function for monitoring output light from a surface-emitting laser.SOLUTION: An optical communication module includes: a surface-emitting laser; an optical fiber for receiving emitted light emitted from the surface-emitting laser; an optical coupling member for optically coupling the emitted light with the optical fiber; and a monitor part for monitoring the emitted light. The optical coupling member includes: a lens part for collimating the emitted light to emit collimated light; a reflection part having a reflective surface for reflecting the collimated light in the direction of the optical fiber; a transmission part which is provided on the reflective surface and transmits, in the direction of the monitor part, a part of the light having passed through the lens part.

Description

  The present invention relates to an optical communication module and an optical coupling member.

Conventionally, in an optical waveguide module using a surface-emitting light-emitting element and an optical waveguide film, the end face of the optical waveguide film is inclined by a dicer to emit light on the inclined surface in order to monitor the light intensity of the light-emitting element with a light-receiving element. Protrusions that allow part of the light from the element to pass therethrough have been formed (see, for example, Patent Document 1).
Patent Document 1 JP 2009-236939 A

  However, in the conventional optical waveguide module, since the radial light emitted from the light emitting element is incident on the film as it is without being collimated, the laser light is incident on the output surface of the convex portion with various angles, The light passing through the convex portion could not be monitored efficiently by the light receiving element.

  In order to solve the above problems, in a first aspect of the present invention, a surface emitting laser, an optical fiber that receives outgoing light emitted from the surface emitting laser, and light that optically couples the outgoing light to the optical fiber. A coupling member and a monitor unit for monitoring the emitted light are provided. The optical coupling member collimates the emitted light, emits the collimated light, and reflects the collimated light from the lens unit in the direction of the optical fiber. An optical communication module is provided that includes a reflecting portion having a surface and a transmitting portion that is provided on the reflecting surface and transmits a part of collimated light from the lens portion in the direction of the monitor portion.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

1 is a side view of an optical communication module according to a first embodiment of the present invention. It is a side view of the optical communication module which concerns on the 2nd Embodiment of this invention. It is a side view of the optical communication module which concerns on the 3rd Embodiment of this invention. It is a side view of the optical communication module which concerns on the 4th Embodiment of this invention. It is a side view of the optical communication module which concerns on the 5th Embodiment of this invention. It is a side view of the optical communication module which concerns on the 6th Embodiment of this invention. It is a side view of the optical communication module which concerns on the 7th Embodiment of this invention. It is a perspective view of the one-dimensional array type optical communication module which concerns on the 8th Embodiment of this invention. It is a side view of the one-dimensional array type optical communication module which concerns on the 9th Embodiment of this invention.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 shows an optical communication module 100 according to a first embodiment of the present invention. The optical communication module 100 includes a surface emitting laser 10, an optical fiber 21, an optical coupling member 30, and a monitor unit 40. The surface emitting laser 10 may be a VCSEL (Vertical Cavity Surface Emitting Laser). The surface emitting laser 10 is mounted on the circuit board 12.

  The optical fiber 21 receives the emitted light emitted from the surface emitting laser 10. The optical fiber 21 may include an optical waveguide 20 having a core portion 24 for transmitting light and a clad 26 surrounding the core portion 24, and a ferrule 22 coupled to an end portion of the optical waveguide 20.

  The optical coupling member 30 optically couples the light emitted from the surface emitting laser 10 to the optical fiber 21. In this case, optically coupled means that the direction of the emitted light emitted from the surface emitting laser 10 is changed and incident on the core portion 24 of the optical fiber 21.

  The optical coupling member 30 is opposed to the surface emitting laser 10, the normal line is opposed to the first surface 32 parallel to the optical axis of the emitted light of the surface emitting laser 10, and the incident side end face of the ferrule 22, and the normal line is The surface emitting laser 10 includes a second surface 34 perpendicular to the optical axis of the emitted light, and a first surface 32 and a reflective surface 62 that intersects the second surface 34. In this example, the first surface 32 and the second surface 34 and the surface obtained by extending the reflecting surface 62 intersect at 45 °, and the first surface 32 and the second surface 34 intersect at an angle of 90 °.

  The optical coupling member 30 may have a triangular prism shape with the first surface 32, the second surface 34, and the reflection surface 62 as side surfaces. The optical coupling member 30 may have a shape in which the angle formed by the triangular prism-shaped first surface 32 and the reflection surface 62 and the angle formed by the second surface 34 and the reflection surface 62 are chamfered.

  The optical coupling member 30 includes a first lens unit 50, a reflection unit 60, a transmission unit 70, and a second lens unit 80. The first lens unit 50 is provided on the first surface 32 so as to face the surface emitting laser 10. The first lens unit 50 collimates the light emitted from the surface emitting laser 10 and emits the collimated light. The first lens unit 50 may be composed of an aspherical microlens provided so that the optical axis coincides with the optical axis of the emitted light of the surface emitting laser 10. According to the first lens unit 50, the angle formed by the light emitted from the surface emitting laser 10 and the reflection surface 62 can be made constant. For this reason, the emitted light of the surface emitting laser 10 can be transmitted to the optical fiber 21 with high accuracy.

  The reflection unit 60 has a reflection surface 62 that reflects the collimated light from the first lens unit 50 in the direction of the optical fiber 21. The reflection surface 62 may have an inclination angle of about 45 ° with respect to the optical axis direction of the light emitted from the surface emitting laser 10. The reflection surface 62 totally reflects the collimated light from the first lens unit 50 in the direction of the optical fiber 21. The inclination angle of the reflecting surface 62 is not limited to 45 ° as long as the total reflection condition is satisfied.

  The transmission unit 70 includes a transmission surface 71 that is provided on the reflection surface 62 and transmits part of the collimated light from the first lens unit 50 in the direction of the monitor unit 40. The transmission surface 71 may be formed with an angle different from that of the reflection surface 62 with respect to the optical axis direction of the emitted light from the surface emitting laser 10. Here, the different angle refers to the angle between the transmission surface 71 and the optical axis of the outgoing light from the surface emitting laser 10 and the angle between the reflective surface 62 and the optical axis of the outgoing light from the surface emitting laser 10. Points differently. The transmission surface 71 may be a surface perpendicular to the optical axis of the light emitted from the surface emitting laser 10.

  The transmission unit 70 has a transmission surface 71 that transmits part of the light that has passed through the first lens unit 50 toward the monitor unit 40. The transmission surface 71 may be configured by extending a part of the reflection surface 62 to the outside of the optical coupling member 30 so as to be perpendicular to the optical axis of the light emitted from the surface emitting laser 10. The transmission surface 71 may be an upper surface of a convex portion formed on the reflection surface 62. Since the first lens unit 50 emits collimated light, the angle formed by the transmissive surface 71 and the collimated light can be made vertical, and light can be efficiently output from the transmissive surface 71.

  The transmission surface 71 may be a square with a side of several microns, for example about 1 micron. The transmission surface 71 may be an arbitrary shape such as a rectangle, a circle, or an ellipse other than a square.

  The second lens unit 80 is provided on the second surface 34 so as to face the end surface of the ferrule 22. The second lens unit 80 collects the reflected light reflected by the reflecting unit 60 on the core unit 24 of the optical fiber 21. The second lens unit 80 may be composed of an aspherical microlens having an optical axis that matches the optical axis of the reflected light reflected by the reflecting surface 62. That is, the second lens unit 80 may be provided so that light that passes through the central axis of the first lens unit 50 and reflected by the reflecting surface 62 passes through the central axis of the second lens unit 80. The second lens unit 80 may have substantially the same diameter as the first lens unit 50.

  The monitor unit 40 monitors the emitted light of the surface emitting laser 10 that has passed through the transmission unit 70. The monitor unit 40 is disposed on the opposite side of the surface emitting laser 10 with the optical coupling member 30 interposed therebetween. The detection surface of the monitor unit 40 is positioned vertically above the transmission surface 71 of the transmission unit 70. The monitor unit 40 may be a planar light receiving element such as a pin photodiode or an avalanche photodiode. The monitor unit 40 may be mounted on the substrate 42.

  The monitor unit 40 monitors the intensity of light incident on the detection surface. The feedback circuit mounted on the circuit board 12 feedback-controls the driving current of the surface emitting laser 10 based on the intensity of light monitored by the monitor unit 40 so that the intensity of the emitted light from the surface emitting laser 10 becomes constant. To do.

  Next, a method for manufacturing the optical coupling member 30 will be described. The optical coupling member 30 can be manufactured by resin injection molding using a mold. Examples of the resin used as the material of the optical coupling member 30 include a resin material having a high refractive index such as ULTEM (trademark). Resin materials other than Ultem may be used. An optical coupling member in which the first lens unit 50, the reflection unit 60, the transmission unit 70, and the second lens unit 80 are integrally formed by pouring a resin melted by heating into a mold, cooling and then removing the mold. 30 is manufactured.

  Since the optical coupling member 30 according to the first embodiment is manufactured using a mold, the dimensional accuracy is high and the degree of freedom of design of the transmission part 70 is high compared to the conventional method of cutting with a blade. The optical coupling member 30 collimates the emitted light from the surface emitting laser 10 with the first lens unit 50, totally reflects it with the reflection unit 60, and condenses it on the core unit 24 of the optical fiber 21 with the second lens unit 80. Therefore, the emitted light from the surface emitting laser 10 can be coupled to the optical fiber 21 with high accuracy.

  Furthermore, the optical coupling member 30 can reduce the area of the transmission surface 71. That is, in the conventional method of forming the convex portion on the inclined surface of the optical waveguide film by dicer processing, the convex portion is formed simultaneously with the inclination processing, so that the convex portion is continuously formed along the inclined surface. Since the optical coupling member 30 in this example can be formed with a small area of the transmission surface 71 by molding, the loss of light emitted from the surface emitting laser 10 can be reduced.

  FIG. 2 shows an optical communication module 200 according to the second embodiment of the present invention. The optical communication module 200 is different from the optical communication module 100 shown in FIG.

  In the second embodiment, the transmission unit 70 includes a transmission surface 72 that is provided on the reflection surface 62 and transmits part of the light that has passed through the first lens unit 50 in the direction of the monitor unit 40. The transmission surface 72 has the same angle and shape as the transmission surface 71 of the optical communication module 100.

  The transmission unit 70 has a transmission surface 72 that transmits part of the light that has passed through the first lens unit 50 on the first lens unit 50 side of the reflection surface 62. That is, the transmission surface 72 may be configured by extending a part of the reflection surface 62 inside the optical coupling member so as to be perpendicular to the optical axis of the light emitted from the surface emitting laser 10. The transmission surface 72 may be a concave bottom surface formed on the reflection surface 62.

  FIG. 3 shows an optical communication module 300 according to the third embodiment of the present invention. The optical communication module 300 is different from the optical communication modules 100 and 200 shown in FIGS. 1 and 2 in the configuration of the transmission unit 70. In the third embodiment, the transmissive portion 70 includes a lens-shaped convex surface 74 provided on the reflective surface 62. The lens-shaped convex surface 74 is formed so as to protrude from the reflecting surface 62 in the direction of the monitor unit 40.

  The lens-shaped convex surface 74 has a function of transmitting a part of light emitted from the surface emitting laser 10 to the outside of the optical coupling member 30 and a function of condensing the light on the light receiving surface of the monitor unit 40. The curvature and shape of the convex surface 74 may be any as long as the emitted light from the surface emitting laser 10 can be condensed on the monitor unit 40. The convex surface 74 may be a curved surface only in the portion through which the collimated light from the first lens unit 50 is transmitted.

  According to the optical coupling member 30 according to the third embodiment, the area of the light receiving surface of the light receiving element of the monitor unit 40 can be reduced. Therefore, scattered light other than the light emitted from the surface emitting laser 10 is prevented from entering the light receiving surface of the monitor unit 40. Therefore, the intensity of the emitted light from the surface emitting laser 10 can be accurately monitored.

  FIG. 4 shows an optical communication module 400 according to the fourth embodiment of the present invention. The optical communication module 400 differs from the optical communication modules 100 to 300 shown in FIGS.

  In the fourth embodiment, the transmission unit 70 includes a scattering unit 76 provided on the reflection surface 62. The scattering portion 76 refers to a portion where the degree of light scattering is higher than other regions of the reflecting surface 62. That is, collimated light incident on a region other than the scattering portion 76 on the reflecting surface 62 is totally reflected in the direction of the optical fiber 21, but collimated light incident on the scattering portion 76 is not in the direction of the optical fiber 21, but the optical coupling member 30. Scattering toward the outside The scattering unit 76 may be formed by roughing a part of the surface of the reflection surface 62 of the reflection unit 60. The scattering portion 76 may be formed by texture processing.

  The monitor unit 40 monitors scattered light scattered from the scattering unit 76 to the outside of the optical coupling member 30 among the emitted light from the surface emitting laser 10. In the present embodiment, it is preferable to increase the light receiving surface of the light receiving element of the monitor unit 40. Further, it is preferable that the position of the monitor unit 40 in the optical axis direction of the emitted light from the surface emitting laser 10 is arranged close to the direction of the surface emitting laser 10. For example, the monitor unit 40 may be disposed in contact with the scattering unit 76. In this case, the detection surface of the monitor unit 40 may be arranged in parallel with the reflection surface 62.

  FIG. 5 shows an optical communication module 500 according to the fifth embodiment of the present invention. The optical communication module 500 is different from the optical communication modules 100 to 400 shown in FIGS. 1 to 4 in the shape of the first lens unit 50, the shape of the transmission unit 70, and the position of the monitor unit 40.

  In the fifth embodiment, the first lens unit 50 has a lens region 52 and a non-lens region 54. The lens region 52 refers to a region where the light emitted from the surface emitting laser 10 is collimated. The non-lens region 54 is a region through which the light emitted from the surface emitting laser 10 passes without being collimated.

  The transmission unit 70 transmits light that has passed through the non-lens region 54 in the direction of the monitor unit 40. The transmission unit 70 is provided between the non-lens region 54 and the monitor unit 40. The transmitting portion 70 is in contact with the non-lens region 54 on a surface extending from the first surface 32. In addition, the transmission unit 70 includes a transmission surface 78 that transmits light that has passed through the non-lens region 54 in the direction of the monitor unit 40.

  The transmission surface 78 may be formed with an angle different from that of the reflection surface 62 with respect to the optical axis direction of the light emitted from the surface emitting laser 10. Here, the different angle refers to the angle between the transmission surface 78 and the optical axis of the outgoing light from the surface emitting laser 10 and the angle between the reflective surface 62 and the optical axis of the outgoing light from the surface emitting laser 10. Points differently. The transmission surface 78 may be a surface perpendicular to the optical axis of the light emitted from the surface emitting laser 10. The monitor unit 40 is placed on the transmission surface 78. That is, the light receiving surface of the monitor unit 40 is in contact with the transmission surface 78.

  The lens region 52 includes a curved surface. The curved surface may be an aspheric surface convex in the direction of the surface emitting laser 10. The curved surface collimates the light emitted from the surface emitting laser 10. The non-lens region 54 includes a flat surface. The flat surface is a surface that is perpendicular to the optical axis of the outgoing light from the surface emitting laser 10 and is parallel to the optical axis of the reflected light.

  The curved surface of the lens region 52 ends at the point of contact with the flat surface of the non-lens region 54. The lens region 52 and the non-lens region 54 are in contact with the optical axis direction of the reflected light, and the curved surface of the lens region 52 coincides with the flat surface of the non-lens region 54 at the contact point.

  The end portion of the lens region 52 on the non-lens region 54 side is closer to the surface emitting laser 10 in the optical axis direction of the emitted light than the opposite end portion. The end of the lens region 52 on the non-lens region 54 side refers to the end of the lens region 52 at the contact point where the curved surface of the lens region 52 contacts the flat surface of the non-lens region 54. The lens region 52 is a curved surface up to the contact point with the non-lens region 54. The curved surface becomes a flat surface at the contact point with the non-lens region 54. That is, a part of the effective lens diameter of the first lens unit 50 is formed as a flat surface having no light collecting function.

  Therefore, the non-lens region 54 allows the emitted light from the surface emitting laser 10 that passes outside the end of the lens region 52 on the non-lens region 54 side to pass through the transmission unit 70 as non-collimated light. The transmission surface 78 transmits the non-collimated light that has passed through the transmission unit 70 to the outside of the optical coupling member 30. In this example, since the monitor unit 40 can be placed on the transmission surface 78 of the transmission unit 70, positioning is easy and the entire module can be made more compact.

  FIG. 6 shows an optical communication module 600 according to the sixth embodiment of the present invention. The optical communication module 600 is different from the optical communication modules 100 to 500 shown in FIGS. The first lens unit 50 has an end surface 58 whose end 56 opposite to the optical fiber 21 is chamfered in parallel with the optical axis direction of the light emitted from the surface emitting laser 10. That is, in the first lens unit 50, a part of the lens effective diameter is cut at the end 56 on the side opposite to the optical fiber 21. The end surface 58 generated by the cutting is a surface parallel to the optical axis direction of the light emitted from the surface emitting laser 10. The optical coupling member 30 in FIG. 6 has a configuration in which the non-lens region 54 and the transmission part 70 are removed from the optical coupling member 30 in FIG.

  The end portion 66 of the reflecting portion 60 opposite to the optical fiber 21 may have an end surface 64 that is flush with the end surface 58 of the first lens unit 50. That is, the reflection part 60 is cut at the end 66 on the opposite side to the optical fiber 21. The cut end face 64 is a plane parallel to the optical axis direction of the emitted light from the surface emitting laser 10. The end surface 58 and the end surface 64 have the same surface perpendicular to the optical axis direction of the reflected light. In this example, the optical coupling member 30 does not have the transmission part 70 on the reflection surface 62.

  The monitor unit 40 monitors the emitted light from the surface emitting laser 10 that passes outside the end portion 56 of the chamfered first lens unit 50. That is, the monitor unit 40 directly monitors the emitted light from the surface emitting laser 10 that does not pass through the optical coupling member 30.

  FIG. 7 shows an optical communication module 700 according to the seventh embodiment of the present invention. The optical communication module 700 is different from the optical communication module 100 shown in FIG. 1 in the inclination angle of the reflection surface 62, the second lens unit 80, and the optical fiber 21.

  In the seventh embodiment, the angle formed by the reflecting surface 62 of the reflecting portion 60 and the optical axis of the emitted light from the surface emitting laser 10 is smaller than 45 degrees. The angle θ between the reflection surface 62 and the optical axis of the emitted light from the surface emitting laser 10 may be smaller than 45 ° as long as the reflection surface 62 totally reflects. The optical coupling member 30 may include a plurality of second lens portions 80 in the optical axis direction of the emitted light from the surface emitting laser 10.

  The plurality of second lens portions 80 are arranged on the second surface 34 of the optical coupling member 30 at equal intervals along the optical axis direction of the emitted light from the surface emitting laser 10. The plurality of second lens portions 80 have the same diameter. The diameter of the second lens unit 80 may be smaller than the diameter of the first lens unit 50. Each of the second lens portions 80 receives the reflected light of the collimated light reflected by the reflecting surface 62 and focuses it on the core portion 24 of the corresponding optical fiber 21.

  The optical fiber 21 is provided for each second lens portion 80. The first lens unit 50 collimates the emitted light from the surface emitting laser 10 and transmits a part of the emitted light through the transmission unit 70. The monitor unit 40 monitors the light transmitted through the transmission unit 70. Each second lens unit 80 inputs light reflected by the reflecting surface 62 to the corresponding optical fiber 21. According to the optical communication module 100 of this example, it is possible to simultaneously transmit to a plurality of optical fibers 21 while monitoring the light emitted from one surface emitting laser 10.

  FIG. 8 shows a one-dimensional array type optical communication module 1000 according to an eighth embodiment of the present invention. The optical communication module 1000 includes a surface emitting laser 10, an optical fiber 21, an optical coupling member 30, and a monitor unit (not shown) provided in an array. The surface emitting lasers 10 are arranged on the circuit board 12 at equal intervals along the X-axis direction. The interval between the surface emitting lasers 10 is, for example, about 250 μm. The optical coupling member 30 is provided extending in the X-axis direction.

  In the eighth embodiment, the optical coupling member 30 includes an array-shaped first lens unit 50 provided corresponding to the surface emitting laser 10, a reflective unit 60 having a reflective surface 62, and the first lens unit 50. Correspondingly, an array-shaped transmission part 70 provided on the reflection surface 62 and an array-shaped second lens part 80 provided corresponding to the first lens part 50 are provided.

  The first lens unit 50 is provided in an array on the first surface 32 along the X-axis direction. The first lens unit 50 collimates the emitted light emitted from the surface emitting laser 10. The reflection surface 62 of the reflection unit 60 totally reflects the collimated light in the direction of the optical fiber 21. The transmission unit 70 transmits a part of the collimated light in the direction of the monitor unit.

  The second lens unit 80 is provided in an array on the second surface 34 along the X-axis direction. The second lens unit 80 condenses the reflected light reflected by the reflecting surface 62 of the reflecting unit 60 on the core unit 24 of the optical fiber 21. The optical fiber 21 is provided corresponding to the second lens unit 80 in the form of an array. The monitor unit is provided on the upper side in the Z-axis direction of the transmission unit 70 in correspondence with the arrayed transmission unit 70. Each light receiving surface of the monitor unit is aligned with each transmission surface 71 of the transmission unit 70 in the X-axis and Y-axis directions.

  The reflection surface 62 has a plurality of transmission parts 70 having the same position in the Z-axis direction and the same position in the Y-axis direction in the X-axis direction at equal intervals. The interval between the transmission parts 70 is equal to the interval between the surface emitting lasers 10. The size of the transmission surface 71 of each transmission part 70 is substantially equal. The shape of the transmission part 70 may be configured by the shape shown in FIGS. 2 to 5 in addition to the convex shape shown in FIG.

  Next, a method for manufacturing the optical coupling member 30 will be described. The optical coupling member 30 according to the eighth embodiment can be manufactured by injection molding of resin using a mold. Examples of the resin used as the material of the optical coupling member 30 include a resin material having a high refractive index such as ULTEM (trademark). Resin materials other than Ultem may be used. The resin melted by heating is poured into the mold, and after cooling, the mold is removed, so that the array-shaped first lens unit 50, the array-shaped transmission unit 70, the array-shaped second lens unit 80, and the reflection unit 60 are obtained. The optical coupling member 30 is integrally molded.

  Since the optical coupling member 30 used in the optical communication module 1000 is manufactured using a mold, the dimensional accuracy is high and the degree of freedom in designing the transmission part 70 is high compared to the conventional method of cutting with a blade. In addition, since the array-shaped first lens part 50, the array-shaped second lens part 80, and the array-shaped transmission part 70 can be simultaneously manufactured by one injection molding, the manufacturing cost can be suppressed.

  Although FIG. 8 shows an example in which a plurality of surface emitting lasers 10 are arranged on a straight line, the surface emitting lasers 10 may not be arranged on a straight line. For example, the surface emitting lasers 10 may be arranged so that the positions in the Y-axis direction change in the adjacent surface emitting lasers 10. In this case, the positions of the corresponding first lens unit 50, transmission unit 70, second lens unit 80, and optical fiber 21 also change.

  FIG. 9 shows a one-dimensional array type optical communication module 2000 according to a ninth embodiment of the present invention. The optical communication module 2000 includes a surface emitting laser 10, an optical fiber 21, an optical coupling member 30, and a monitor unit 40 provided in an array. The surface emitting lasers 10 are arranged at equal intervals along the Y-axis direction on the circuit board 12. The interval between the surface emitting lasers 10 is, for example, about 250 μm. The optical coupling member 30 is provided to extend in the Y-axis direction and the Z-axis direction.

  The optical coupling member 30 includes an array-shaped first lens unit 50 provided corresponding to the surface emitting laser 10, a reflective unit 60 having a reflective surface 62, and a reflective surface 62 corresponding to the first lens unit 50. The transmission part 70 provided and the arrayed second lens part 80 provided corresponding to the first lens part 50 are included. The first lens unit 50 collimates the emitted light emitted from the surface emitting laser 10.

  The reflection surface 62 of the reflection unit 60 totally reflects the collimated light in the direction of the optical fiber 21. The transmission unit 70 transmits a part of the collimated light in the direction of the monitor unit 40. The second lens unit 80 condenses the reflected light reflected by the reflecting surface 62 of the reflecting unit 60 on the core unit 24 of the optical fiber 21.

  The first lens unit 50 is provided in an array along the Y-axis direction on the first surface 32 corresponding to the surface emitting laser 10. The second lens unit 80 is provided in an array on the second surface 34 along the Z-axis direction. The optical fiber 21 is provided side by side in the Z-axis direction so as to correspond to the arrayed second lens portion 80.

  The transmissive portions 70 are provided along the reflective surface 62 at equal intervals corresponding to the respective surface emitting lasers 10. The monitor unit 40 is provided in an array along the Y-axis direction on the upper side in the Z-axis direction of the transmission unit 70 corresponding to the transmission unit 70. Each light receiving surface of the monitor unit 40 is aligned with each transmission surface 71 of the transmission unit 70 in the Z-axis and Y-axis directions. The size of the transmission surface 71 of each transmission part 70 is substantially equal. The shape of the transmission part 70 may be configured by the shape shown in FIGS. 2 to 5 in addition to the convex shape shown in FIG.

  Although FIG. 9 shows an example in which a plurality of surface emitting lasers 10 are arranged on a straight line, the surface emitting lasers 10 may not be arranged on a straight line. For example, the surface emitting lasers 10 may be arranged so that the position in the Z-axis direction changes in the adjacent surface emitting lasers 10. In this case, the positions of the corresponding first lens unit 50, transmission unit 70, second lens unit 80, and optical fiber 21 also change.

  In the ninth embodiment, the optical communication module 2000 may be a two-dimensional array type optical communication module. The two-dimensional array type optical communication module includes a surface emitting laser 10, an optical fiber 21, an optical coupling member 30, and a monitor unit 40 provided in a two-dimensional array. The surface emitting laser 10 includes a first direction (Y-axis direction in FIG. 8) parallel to the optical axis direction of the reflected light, and a second direction (see FIG. 8) perpendicular to the first direction and the optical axis direction of the emitted light. 8 (in the X-axis direction) at equal intervals in a matrix. The interval between the surface emitting lasers 10 is, for example, about 250 μm.

  The optical coupling member 30 in the ninth embodiment is configured by combining the optical coupling member 30 shown in FIG. 8 and the optical coupling member 30 shown in FIG. The optical coupling member 30 according to the ninth embodiment includes a first lens unit 50 having a two-dimensional array provided on the first surface 32 corresponding to the surface emitting laser 10, and a reflective unit 60 having a reflective surface 62. The two-dimensional array-shaped transmission part 70 provided on the reflection surface 62 corresponding to the first lens part 50 and the two-dimensional array-like transmission part 70 provided corresponding to the first lens part 50 on the second surface 34. And a second lens unit 80. The optical fiber 21 is provided side by side corresponding to the two-dimensional array-shaped second lens unit 80.

  The transmissive portions 70 are provided in an array along the reflective surface 62 so as to correspond to the surface emitting laser 10. The monitor unit 40 may be provided in an array corresponding to the transmission unit 70 on the upper side in the Z-axis direction of the transmission unit 70. Each light receiving surface of the monitor unit 40 is aligned with each transmission surface 71 of the transmission unit 70 in the X-axis and Y-axis directions. The size of the transmission surface 71 of each transmission part 70 is substantially equal. The shape of the transmission part 70 may be configured by the shape shown in FIGS. 2 to 5 in addition to the convex shape shown in FIG.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 10 ... Surface emitting laser, 12 ... Circuit board, 20 ... Optical waveguide, 21 ... Optical fiber, 22 ... Ferrule, 24 ... Core part, 26 ... Cladding, 30. ..Optical coupling member, 32... 1st surface, 34... 2nd surface, 40... Monitor unit, 42... Substrate, 50. Lens area, 54... Non-lens area, 56, 66... End, 58, 64... End face, 60. , 72, 78 ... transmission surface, 74 ... convex surface, 76 ... scattering portion, 80 ... second lens portion, 100, 200, 300, 400, 500, 600, 700, 1000, 2000 ..Optical communication module

Claims (15)

A surface emitting laser;
An optical fiber for receiving the emitted light emitted from the surface emitting laser;
An optical coupling member for optically coupling the emitted light to the optical fiber;
A monitor for monitoring the emitted light;
With
The optical coupling member is
A first lens unit that collimates the emitted light and emits the collimated light;
A reflecting portion having a reflecting surface for reflecting the collimated light in the direction of the optical fiber;
A transmission part provided on the reflection surface and transmitting a part of the light that has passed through the first lens part in the direction of the monitor part;
An optical communication module.   2. The optical communication module according to claim 1, wherein the optical coupling member further includes a second lens unit that condenses the reflected light reflected by the reflecting unit on the core of the optical fiber.   The transmissive part is formed with an angle different from the reflective surface with respect to the optical axis direction of the emitted light, and a transmissive surface that transmits a part of the light that has passed through the first lens part, The optical communication module according to claim 1, wherein the optical communication module is located closer to the monitor unit than the reflecting surface.   The transmissive part is formed with an angle different from the reflective surface with respect to the optical axis direction of the emitted light, and a transmissive surface that transmits a part of the light that has passed through the first lens part, The optical communication module according to claim 1, wherein the optical communication module has the first lens unit side with respect to a reflection surface.   The optical communication module according to claim 1, wherein the transmission part includes a lens-shaped convex part that is provided on the reflection surface and is raised in the direction of the monitor part.   The optical communication module according to claim 1, wherein the transmission unit includes a scattering unit that is provided on the reflection surface and has a higher scattering degree than other regions of the reflection surface. The first lens unit is
A lens region for collimating the emitted light;
A non-lens region through which the emitted light passes, and
Have
The transmission unit transmits light that has passed through the non-lens region in the direction of the monitor unit.
The optical communication module according to claim 1. The lens region includes a curved surface, the non-lens region includes a flat surface, the curved surface of the lens region ends at a contact point with the flat surface of the non-lens region, and the end of the lens region on the non-lens region side is , Closer to the surface-emitting laser in the optical axis direction of the emitted light than the end on the opposite side,
The optical communication module according to claim 7.   The transmission unit is formed with an angle different from the reflection surface with respect to the optical axis direction of the emitted light, and has a transmission surface that transmits light that has passed through the non-lens region, and the monitor unit The optical communication module according to claim 8, wherein the optical communication module is placed on the transmission surface of the transmission unit. The optical coupling member has a plurality of the second lens portions in the optical axis direction of the emitted light,
The said optical communication module is an optical communication module of Claim 2 provided with the said optical fiber with respect to each said 2nd lens part.   The optical communication module according to claim 10, wherein an angle formed by the reflection surface of the reflection portion and the optical axis of the emitted light is smaller than 45 degrees. The surface emitting lasers are provided in an array,
The monitor unit is provided corresponding to each of the surface emitting lasers,
In the optical coupling member, the first lens portion is provided corresponding to each of the surface emitting lasers,
The transmission part is provided corresponding to each of the first lens parts,
The second lens portion is provided corresponding to each of the first lens portions,
The optical communication module according to claim 2, wherein the optical fiber is provided corresponding to each of the second lens portions.   The array is arranged in at least one of a first direction parallel to the optical axis direction of the reflected light and a second direction perpendicular to the first direction and the optical axis direction of the emitted light. The optical communication module according to claim 12. A surface emitting laser;
An optical fiber for receiving the emitted light emitted from the surface emitting laser;
An optical coupling member for optically coupling the emitted light to the optical fiber;
A monitor for monitoring the emitted light;
With
The optical coupling member is
Collimating the emitted light, and a lens portion emitting the collimated light;
A reflecting portion having a reflecting surface for reflecting the collimated light in the direction of the optical fiber;
Have
The lens portion has an end surface whose end opposite to the optical fiber is chamfered in parallel with the optical axis direction of the emitted light,
The end of the reflecting portion opposite to the optical fiber has an end surface that is flush with the end surface of the lens portion,
An optical communication module in which the emitted light passing outside the end of the chamfered lens unit is monitored by the monitor unit.   The optical coupling member used for the optical communication module as described in any one of Claims 1-14.

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