CN117233902A - Light splitting module and application method thereof - Google Patents

Abstract

The invention discloses a light splitting module and an application method thereof, wherein the light splitting module comprises an integrated light transmission mechanism with a lens, and at least one special-shaped groove matched with a laser Vcsel is arranged on the light transmission mechanism to split light to an optical fiber and monitor a photodiode MPD through reflection. The invention provides a light splitting module and an application method thereof, wherein the light splitting module is integrally formed, the light emitted by a laser is reflected and split through different faces forming a certain angle on a special-shaped groove, the light splitting proportion of a main light path and a secondary light path can be controlled through the adjustment of the reflected light angle formed by different reflecting faces, the energy of the main light path is attenuated, the light is reflected to an MPD, and photocurrent is monitored.

Description

Light splitting module and application method thereof

Technical Field

The invention relates to the field of optical module preparation. More particularly, the present invention relates to a spectroscopic module for use in the coupling of optical communication COB (Chip on Board) multichannel optical device products and a method of using the same.

Background

When the chip package COB (Chip on Board) multichannel optical device product on the optical communication board is coupled, the attenuation coating is needed to reduce the luminescence Po because the luminescence of the laser Vcsel is larger, the attenuation amplitude is generally-1 to-6 dB, and the backlight current of the transmitting end is needed to be monitored to judge whether the Vcsel works normally.

The current mainstream COB design scheme is that a reflective film or an absorbing film is plated at a medium surface to carry out light intensity attenuation of a light emitting chip (the light power is prevented from exceeding the upper specification limit required by a module too much), and light is split in a film plating or total reflection mode, and an MPD is attached below a reflected light path to carry out light power monitoring, but the method needs to increase a film plating process, and the film plating cost is high, so that the product is unfavorable in commercial competition. And adding steps also increases product manufacturing time, resulting in delays in product delivery.

Disclosure of Invention

It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a spectroscopic module comprising an integral light transmission mechanism with a lens, on which at least one profiled groove is provided that cooperates with a laser Vcsel to monitor a photodiode MPD by reflecting light onto an optical fiber.

Preferably, the profiled groove is configured to include a first V-shaped mechanism that mates with Vcsel and a second V-shaped mechanism that mates with monitor photodiode MPD;

the first V-shaped mechanism is provided with a first reflecting surface, a second reflecting surface and a first reflecting sharp angle constructed by the first reflecting surface and the second reflecting surface at a position matched with the Vcsel;

the second V-shaped structure is provided with a third reflecting surface matched with the second reflecting surface at one side matched with the MPD;

and the depth of the second V-shaped structure is configured to be greater than the depth of the first V-shaped structure.

When the emergent light of Vcsel is output to a first V-shaped structure through a first collimating lens matched with the emergent light, a main light path matched with a coupling optical fiber is constructed through a first reflecting surface, and a secondary light path matched with the MPD is constructed through a second reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the first reflecting sharp angle;

the intensity of the light received by the MPD from the third reflective surface is controlled by adjusting the left and right positions of the MPD.

Preferably, the profiled groove is configured to comprise a third V-shaped mechanism cooperating with the laser Vcsel;

the third V-shaped mechanism is provided with a fourth reflecting surface and a fifth reflecting surface at the position matched with the Vcsel, and a second reflecting sharp angle constructed by the fourth reflecting surface and the fifth reflecting surface;

wherein the included angle between the fifth reflecting surface and the horizontal plane is smaller than the included angle between the fourth reflecting surface and the horizontal plane.

When the emergent light of Vcsel outputs parallel light to a third V-shaped structure through a matched second collimating lens, the parallel light constructs a main light path matched with a coupling optical fiber through a fourth reflecting surface, and constructs a secondary light path matched with MPD through a fifth reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the second reflecting sharp angle;

the intensity of the light received by the MPD from the fifth reflecting surface is controlled by adjusting the left and right positions of the MPD.

Preferably, the profiled groove is configured to comprise a fourth V-shaped mechanism cooperating with the laser Vcsel;

wherein the fourth V-shaped mechanism is provided with a sixth reflecting surface and a seventh reflecting surface on the same side matched with the Vcsel, and a third reflecting sharp angle constructed by the sixth reflecting surface and the seventh reflecting surface;

wherein the included angle between the sixth reflecting surface or the seventh reflecting surface and the horizontal plane is configured to have an included angle of 45 degrees;

the seventh or sixth reflecting surface is disposed at an angle to the horizontal of less than 45 degrees.

When the emergent light of Vcsel outputs parallel light to a fourth V-shaped structure through a matched third collimating lens, the parallel light constructs a main light path matched with a coupling optical fiber through a sixth reflecting surface or a seventh reflecting surface, and constructs a secondary light path matched with MPD through the seventh reflecting surface or the sixth reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the third reflecting sharp angle;

the intensity of the light received by the MPD from the seventh reflecting surface or the sixth reflecting surface is controlled by adjusting the left and right positions of the MPD.

A mold for preparing a light splitting module is provided, and a cavity matched with the light splitting module structure is formed in the mold.

In the Z-axis direction of the light splitting module, the depth of the first V-shaped mechanism on the Z-axis is adjusted up and down to adjust the light intensity attenuation proportion from the laser Vcsel to the optical fiber;

or in the X or Y axis direction of the light splitting module, the light intensity reflected to the MPD and the light reflected to the Vcsel are controlled by adjusting the rotation direction of the second V-shaped mechanism with the X or Y axis as the rotation center.

The invention at least comprises the following beneficial effects: the invention carries out reflection and light splitting operation on the emitted light of the laser through different faces forming a certain angle on the special-shaped groove by arranging the integrally formed light splitting module, further forms the adjustment of the angle of the reflected light through different reflecting faces, can control the light splitting proportion of the main light path and the auxiliary light path, and reflects the partial light intensity to the MPD to monitor photocurrent while attenuating the energy of the main light path;

the invention changes the light splitting quantity by using a total reflection mode, can reflect 1 to 90 percent of light by adjusting the position of the reflecting surface, controls the light intensity incident on the photosensitive surface by adjusting the position at the MPD end, and ensures that the responsivity is not saturated.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic diagram of the external structure of a spectroscopic structure according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1 at one viewing angle;

FIG. 3 is a schematic diagram of the configuration of FIG. 1 in combination with a laser, monitor photodiode;

FIG. 4 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 5 is a schematic view of an optical path structure according to a first embodiment of the present invention;

FIG. 6 is a schematic view of an alternative embodiment of the first aspect of the present invention;

FIG. 7 is a schematic view of an optical path structure according to another alternative embodiment of the first embodiment of the present invention;

FIG. 8 is a schematic view of the optical path structure of FIG. 7 at another view angle;

FIG. 9 is a schematic view of a portion of the enlarged structure of FIG. 8;

FIG. 10 is a schematic diagram of an optical path structure according to a second embodiment of the present invention;

FIG. 11 is a schematic structural view of a third embodiment of the present invention;

FIG. 12 is a schematic view of a portion of the enlarged structure of FIG. 11;

FIG. 13 is a schematic diagram of a fourth embodiment of the present invention;

FIG. 14 is a schematic view of a portion of the enlarged structure of FIG. 13;

FIG. 15 is a diagram of a coupled COB finished product to which the spectroscopy module of the present invention is applied;

FIG. 16 is a schematic diagram of an application scheme I for optical power adjustment;

FIG. 17 is another schematic diagram of an application scheme one for optical power adjustment;

FIG. 18 is a schematic diagram illustrating three axial directions of a spectroscopic module according to the present invention;

FIG. 19 is a view of the spectroscopic module of the present invention when rotated about the x-axis;

fig. 20 is a schematic view of fig. 19 after rotation about the x-axis.

Detailed Description

The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It should be noted that, in the description of the present invention, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Fig. 1-5 and 13 show an implementation form of a light splitting module according to the present invention, which includes an integrated light transmitting mechanism 1 with a lens 10, wherein the light transmitting mechanism may be made of PEI material or other light permeable material, and at least one special-shaped groove 2 matching with a laser Vcsel 3 is disposed thereon to split light to an optical fiber 4 by reflection and monitor a photodiode MPD 5.

In one embodiment, as in fig. 3-5, the profiled groove is configured to include a first V-shaped mechanism 20 that mates with Vcsel, and a second V-shaped mechanism 21 that mates with monitor photodiode MPD;

wherein, the first V-shaped mechanism is provided with a first reflecting surface 200, a second reflecting surface 201 and a first reflecting sharp angle 202 which is constructed by the first reflecting surface and the second reflecting surface at the position matched with the Vcsel;

the second V-shaped structure is provided with a third reflecting surface 210 matched with the second reflecting surface at one side matched with the MPD;

the depth of the second V-shaped structure is configured to be larger than that of the first V-shaped structure, the two V-shaped structures are arranged in the scheme, wherein a first reflecting surface in the first V-shaped structure can be regarded as a main reflecting surface for constructing a main light path, a second reflecting surface can be regarded as a secondary reflecting surface for constructing a secondary light path, when the device is in practical application, light emitted by the Vcsel is split by adding the reflecting surface at the side of the main reflecting surface, the main reflecting surface carries out 90-degree reflection to obtain the main light path which can be coupled to an optical fiber, and the split secondary light path changes the direction of part of light beams through the secondary reflecting surface to obtain the secondary light path matched with the MPD, so that the splitting operation is completed, and the light intensity monitoring photocurrent is reflected to the MPD while the energy of the main light path is attenuated. The effect of setting the depth of the second V-shaped structure to be greater than that of the first V-shaped structure is to ensure that light reflected by the secondary reflecting surface can be reflected by the third reflecting surface to reach the MPD.

In practical application, as shown in fig. 6-9, the first scheme can also exchange the positions of the MPD and the Vcsel according to the need, and set the horizontal included angle of the second reflecting surface to 45 degrees at the same time, after exchange, the light generated by the Vcsel is reflected by the third reflecting surface, part of the reflected light enters the MPD after being reflected by the second reflecting surface, and the other part of the light is directly carried out in the optical fiber, and in the process, the reflection quantity reflected to the MPD can be regulated by regulating the depth of the first V-shaped structure.

As shown in fig. 5, in a method for performing light splitting by using a light splitting module, when an outgoing light of Vcsel is output to a first V-shaped structure through a first collimating lens, a main light path matched with a coupling optical fiber is constructed by the parallel light through a first reflecting surface, and a sub light path matched with an MPD is constructed by the parallel light through a second reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the first reflecting sharp angle;

the intensity of the light received by the MPD from the third reflective surface is controlled by adjusting the left and right positions of the MPD. In this scheme, a method for attenuating the energy of a main light path and monitoring the backlight current through a light splitting module is provided, the light splitting proportion is adjusted by adjusting the position of the light splitting module left and right, and the received light intensity is controlled by adjusting the position of the MPD left and right so as to avoid the saturation of photocurrent.

In a second variant, as in fig. 10, the profiled groove is configured to comprise a third V-shaped mechanism 23 cooperating with the laser Vcsel;

wherein, the third V-shaped mechanism is provided with a fourth reflecting surface 230, a fifth reflecting surface 231 and a second reflecting sharp angle 232 constructed by the fourth reflecting surface and the fifth reflecting surface at the position matched with the Vcsel;

the included angle between the fifth reflecting surface and the horizontal plane is configured to be smaller than the included angle between the fourth reflecting surface and the horizontal plane, the scheme only sets a third V-shaped structure, the fourth reflecting surface in the third V-shaped structure can be regarded as a main reflecting surface for constructing a main light path, the fifth reflecting surface can be regarded as a secondary reflecting surface for constructing a secondary light path, when in practical application, light emitted by the Vcsel is split by adding the reflecting surface at the side of the main reflecting surface, the main reflecting surface is reflected by 90 degrees to obtain the main light path which can be coupled to an optical fiber, the secondary light path of the split light beam changes the direction of part of the light beam through the secondary reflecting surface to obtain the secondary light path matched with the MPD, the split operation is completed, and the light intensity monitoring photocurrent is reflected to the MPD while the energy of the main light path is attenuated. The included angle between the fifth reflecting surface and the horizontal plane is smaller than the included angle between the fourth reflecting surface and the horizontal plane, so that the reflecting angle of the auxiliary reflecting surface is adjusted to enable the reflected light to reach the MPD, and meanwhile, the distance between the MPD and the Vcsel is controlled to control the volume of the module.

As shown in fig. 10, in a method for performing light splitting by using a light splitting module, when an outgoing light of Vcsel outputs a parallel light to a third V-shaped structure through a matched second collimating lens, the parallel light constructs a main light path matched with a coupling optical fiber through a fourth reflecting surface, and constructs a sub light path matched with an MPD through a fifth reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the second reflecting sharp angle;

the intensity of the light received by the MPD from the fifth reflecting surface is controlled by adjusting the left and right positions of the MPD. In this scheme, a method for attenuating the energy of a main light path and monitoring the backlight current through a light splitting module is provided, the light splitting proportion is adjusted by adjusting the position of the light splitting module left and right, and the received light intensity is controlled by adjusting the position of the MPD left and right so as to avoid the saturation of photocurrent.

In a third embodiment, as in fig. 11-12, the profiled groove is configured to comprise a fourth V-shaped mechanism i 23 cooperating with the laser Vcsel;

wherein the fourth V-shaped mechanism is provided with a sixth reflecting surface I230, a seventh reflecting surface I231 and a third reflecting sharp angle I232 which is constructed by the sixth reflecting surface and the seventh reflecting surface on the same side matched with the Vcsel;

wherein the included angle between the sixth reflecting surface I230 and the horizontal plane is configured to have an included angle of 45 degrees. According to the scheme, only one fourth V-shaped structure I is arranged, a sixth reflecting surface I in the fourth V-shaped structure I can be regarded as a main reflecting surface for constructing a main light path, a seventh reflecting surface I can be regarded as a secondary reflecting surface for constructing a secondary light path, when the scheme is practically applied, light emitted by the Vcsel is split by adding the reflecting surface at the side of the main reflecting surface, the main reflecting surface carries out 90-degree reflection to obtain the main light path which can be coupled to an optical fiber, a part of light beams are redirected by the split secondary light path through the secondary reflecting surface to obtain the secondary light path matched with the MPD, the splitting operation is completed, and the light intensity is monitored to the MPD while the energy of the main light path is attenuated. In this scheme, set up the main reflecting surface of 45 degrees contained angles through the homonymy, be 90 degrees through its reflection angle, regard it as the main light path, another homonymy reflecting surface side contained angle is less than 45 degrees, regard as the auxiliary reflecting surface, regard it as the auxiliary light path, its effect lies in the reflection angle of adjustment auxiliary reflecting surface to make the reflected light can reach MPD, control the interval between MPD and the Vcsel simultaneously, control module volume.

In a fourth embodiment, shown in fig. 13-14, the profiled groove is configured to include a fourth V-shaped mechanism ii 24 for cooperating with the laser Vcsel;

wherein, the fourth V-shaped mechanism is provided with a sixth reflecting surface II 240, a seventh reflecting surface II 241 and a third reflecting sharp angle II 242 which is constructed by the sixth reflecting surface and the seventh reflecting surface on the same side matched with the Vcsel;

wherein the included angle between the seventh reflecting surface II 241 and the horizontal plane is configured to have an included angle of 45 degrees; according to the scheme, only one fourth V-shaped structure II is arranged, a seventh reflecting surface II in the fourth V-shaped structure II can be regarded as a main reflecting surface for constructing a main light path, a sixth reflecting surface II can be regarded as a secondary reflecting surface for constructing a secondary light path, when the scheme is actually applied, light emitted by the Vcsel is split by adding the reflecting surface at the side of the main reflecting surface, the main reflecting surface carries out 90-degree reflection to obtain the main light path which can be coupled to an optical fiber, a part of light beams are redirected by the split secondary light path through the secondary reflecting surface to obtain a secondary light path matched with the MPD, the splitting operation is completed, and the light intensity is monitored to the MPD while the energy of the main light path is attenuated. In this scheme, set up the main reflecting surface of 45 degrees contained angles through the homonymy, be 90 degrees through its reflection angle, regard it as the main light path, another homonymy reflecting surface side contained angle is less than 45 degrees, regard as the auxiliary reflecting surface, regard it as the auxiliary light path, its effect lies in the reflection angle of adjustment auxiliary reflecting surface to make the reflected light can reach MPD, control the interval between MPD and the Vcsel simultaneously, control module volume.

As shown in fig. 12 and 14, in a method for splitting light by using a light splitting module, when the outgoing light of Vcsel outputs parallel light to a fourth V-shaped structure through a matched third collimating lens, the parallel light constructs a main light path matched with a coupling optical fiber through a sixth reflecting surface or a seventh reflecting surface, and constructs a sub light path matched with MPD through the seventh reflecting surface or the sixth reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the third reflecting sharp angle;

the intensity of the light received by the MPD from the seventh reflecting surface or the sixth reflecting surface is controlled by adjusting the left and right positions of the MPD. In the scheme, a method for attenuating the energy of a main light path and monitoring backlight current through a light splitting module is provided, and light emitted by Vcsel is reflected by two identical sides with different angles respectively. One is 45 degrees as the main reflecting surface, and another is less than 45 degrees as the auxiliary reflecting surface, gives MPD with light reflection, further adjusts the beam split proportion through controlling the position of adjustment beam split module, adjusts the position of MPD with the light intensity size of control receipt about through to avoid the photocurrent saturation, its easy operation, easy implementation.

The utility model provides a preparation beam split module's mould, have in the mould with beam split module structure matched with die cavity, in practical application, the material of mould is configured to adopt PEI plastics or other light permeable material, pour into the die cavity of mould after melting the material, just can obtain integrated into one piece's beam split module, it can carry out integrated preparation with a plurality of lenses in space, fix the distribution position of lens in space, later stage when carrying out the opto-coupler, only need carry out holistic position adjustment with module and outside laser instrument, optic fibre etc. and just can satisfy the requirement, need not carry out alone location adjustment to each lens position for reflection, can save man-hour, guarantee the uniformity of coupling effect simultaneously, each reflecting surface is through total reflection or set up the reflecting film in order to realize.

Fig. 18 shows a cross-sectional view P of a light splitting module, on which three directions of X, Y, Z axes are marked, in a specific application, as shown in fig. 16, a method for performing optical power attenuation by using a light splitting module is provided, in a Z-axis direction of the light splitting module, by adjusting a distance between a second special-shaped groove and a Vcsel up and down, a reflection area of a total reflection surface 6 formed by opposite reflection surfaces is adjusted, and then a light intensity attenuation ratio of the Vcsel to an optical fiber is further adjusted, in this embodiment, an up-down position of a circle Z in the Z-axis direction is actually adjusted, so that a contact position between the total reflection surface and a light beam is further controlled, and the light intensity attenuation ratio of the Vcsel to the optical fiber is further controlled. According to the scheme, the depth (along the Z-axis direction of the V-shaped groove in the circle) of the V-shaped groove extending downwards (along the Z-axis direction of the V-shaped groove in the circle, namely, the direction of the double-headed arrow) is utilized, the quantity of reflected light intensity is controlled to be different from 1% -90%, the residual collimated light is continuously transmitted and converged into the fiber core of the optical fiber, and further, a proper attenuation value can be selected according to the luminous light intensity of different chips, an originating Lens does not need to be coated with an attenuation film, and the generation cost is controlled.

As shown in fig. 17, in a method for attenuating optical power by using a light splitting module, an included angle between a direction of a reflected light beam of a first reflecting surface and a direction of a second reflecting surface is set to be a, and then the size of the angle a is adjusted in a range of 0-180 degrees with a Y-axis direction of the light splitting module as an axis, so as to control the light intensity reflected onto the MPD and the light reflected onto the Vcsel. In this scheme, as shown in fig. 17, the v-groove performs a rotation angle adjustment in the direction about the Y-axis, while the limiting angle is adjusted between 0 degrees and 180 degrees, so that the light intensity reflected on the MPD is within a certain range, and the light reflected on the Vcsel is minimized.

As shown in fig. 19, in the viewing direction L, there is a reflecting surface a, and in a specific application, as shown in fig. 20, a method for performing optical power attenuation by using a light splitting module, where an included angle between an original position of the second reflecting surface in the X-axis direction and a position rotated along the X-axis direction is set to B, and then the size of the angle B is adjusted in a range of-90-90 degrees with the X-axis direction of the light splitting module as an axis, so as to control the light intensity reflected on the MPD and control the light reflected on the Vcsel. In this scheme, let the original position of the second reflecting surface in the X-axis be a, the position of the second reflecting surface after rotating along the X-axis be B, obtain the included angle B between a and B, then the V-shaped groove carries out the rotation angle adjustment of direction with the X-axis as the rotation center, and the limit angle is adjusted between-90 degrees to +90 degrees, so that the light intensity reflected on the MPD is within a certain range, and the light reflected on the Vcsel is reduced to the maximum extent.

The invention changes the light splitting quantity by using a total reflection mode, can reflect 1 to 90 percent of light by the position adjustment and the angle adjustment of the reflecting surface, realizes the light intensity of the light coupled to the optical fiber, and can save the attenuation film plating at the emitting end by the structural design and control the cost.

A method for optical power attenuation using a spectroscopic module, further comprising: by adjusting the position of the MPD left and right, the beam split received by the MPD is obtained. In this scheme, as shown by the horizontal double-headed arrow at the MPD in fig. 16, the responsivity is not saturated by adjusting its position to an appropriate level at the MPD end to adjust the intensity of the control beam incident on the photosurface.

The above is merely illustrative of a preferred embodiment, but is not limited thereto. In practicing the present invention, appropriate substitutions and/or modifications may be made according to the needs of the user.

The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.

Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (9)

1. The light splitting module is characterized by comprising an integrated light transmission mechanism with a lens, wherein at least one special-shaped groove matched with a laser Vcsel is arranged on the light transmission mechanism to split light to an optical fiber and monitor a photodiode MPD through reflection.

2. The optical splitter module of claim 1, wherein said profiled groove is configured to include a first V-shaped mechanism that mates with Vcsel and a second V-shaped mechanism that mates with monitor photodiode MPD;

the first V-shaped mechanism is provided with a first reflecting surface, a second reflecting surface and a first reflecting sharp angle constructed by the first reflecting surface and the second reflecting surface at a position matched with the Vcsel;

the second V-shaped structure is provided with a third reflecting surface matched with the second reflecting surface at one side matched with the MPD;

and the depth of the second V-shaped structure is configured to be greater than the depth of the first V-shaped structure.

3. A method for splitting light by using the light splitting module as claimed in claim 2, wherein when the emergent light of Vcsel is output to the first V-shaped structure through the matched first collimating lens, the parallel light constructs a main light path matched with the coupling optical fiber through the first reflecting surface, and constructs a sub light path matched with the MPD through the second reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the first reflecting sharp angle;

the intensity of the light received by the MPD from the third reflective surface is controlled by adjusting the left and right positions of the MPD.

4. The spectroscopic module of claim 1, wherein the profiled groove is configured to include a third V-shaped mechanism that mates with a laser Vcsel;

the third V-shaped mechanism is provided with a fourth reflecting surface and a fifth reflecting surface at the position matched with the Vcsel, and a second reflecting sharp angle constructed by the fourth reflecting surface and the fifth reflecting surface;

wherein the included angle between the fifth reflecting surface and the horizontal plane is smaller than the included angle between the fourth reflecting surface and the horizontal plane.

5. A method for splitting light by using the light splitting module as claimed in claim 4, wherein when the emergent light of Vcsel outputs parallel light to the third V-shaped structure through the matched second collimating lens, the parallel light constructs a main light path matched with the coupling optical fiber through the fourth reflecting surface, and constructs a sub light path matched with the MPD through the fifth reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the second reflecting sharp angle;

the intensity of the light received by the MPD from the fifth reflecting surface is controlled by adjusting the left and right positions of the MPD.

6. The spectroscopic module of claim 1, wherein the profiled groove is configured to include a fourth V-shaped mechanism that mates with a laser Vcsel;

wherein the fourth V-shaped mechanism is provided with a sixth reflecting surface and a seventh reflecting surface on the same side matched with the Vcsel, and a third reflecting sharp angle constructed by the sixth reflecting surface and the seventh reflecting surface;

wherein the included angle between the sixth reflecting surface or the seventh reflecting surface and the horizontal plane is configured to have an included angle of 45 degrees;

the seventh or sixth reflecting surface is disposed at an angle to the horizontal of less than 45 degrees.

7. A method for applying the optical splitting module as claimed in claim 6, wherein when the Vcsel outputs parallel light to the fourth V-shaped structure through the matched third collimating lens, the parallel light forms a main optical path matched with the coupling optical fiber through the sixth reflecting surface or the seventh reflecting surface, and forms a sub optical path matched with the MPD through the seventh reflecting surface or the sixth reflecting surface;

the light splitting ratio of the main light path and the auxiliary light path is controlled by adjusting the left and right positions of the third reflecting sharp angle;

the intensity of the light received by the MPD from the seventh reflecting surface or the sixth reflecting surface is controlled by adjusting the left and right positions of the MPD.

8. A mould for preparing the spectroscopic module as claimed in any one of claims 1, 2, 4 and 6, wherein the mould has a cavity therein for cooperation with the spectroscopic module structure.

9. A method for adjusting optical power attenuation by using the optical splitting module according to claim 2, wherein the depth of the first V-shaped mechanism on the Z-axis is adjusted up and down in the Z-axis direction of the optical splitting module to adjust the light intensity attenuation ratio from the laser Vcsel to the optical fiber;

or in the X or Y axis direction of the light splitting module, the light intensity reflected to the MPD and the light reflected to the Vcsel are controlled by adjusting the rotation direction of the second V-shaped mechanism with the X or Y axis as the rotation center.