阅读说明：本技术 光接收次模块和光模块 (Optical receive sub-module and optical module ) 是由 葛建平 宋琛 王继罗 于 2021-09-29 设计创作，主要内容包括：本发明涉及一种光接收次模块和光模块,该光接收次模块包括：光接收次模块本体和光折射结构；光折射结构设置在光接收次模块本体的Z-BLOCK和第一透镜之间,用于对透过所述第一透镜的光进行光路校正,使得透过第一透镜的光入射至Z-BLOCK的窗口中心。本发明通过采用光折射结构替换相关技术的光接收次模块中的位移棱镜,光折射结构具有制作工艺简单和价格低的优点,使得本发明的光接收次模块制作工艺简单,以及制作成本低。(The invention relates to a light receiving submodule and an optical module, the light receiving submodule comprises: the light receiving secondary module comprises a light receiving secondary module body and a light refraction structure; the light refraction structure is arranged between the Z-BLOCK of the light receiving submodule body and the first lens and used for carrying out light path correction on light penetrating through the first lens, so that the light penetrating through the first lens is incident to the center of a window of the Z-BLOCK. The invention replaces the displacement prism in the light receiving submodule of the related technology by the light refraction structure, and the light refraction structure has the advantages of simple manufacturing process and low price, so that the light receiving submodule of the invention has simple manufacturing process and low manufacturing cost.)

1. An optical receive sub-module, comprising: the light receiving secondary module comprises a light receiving secondary module body and a light refraction structure;

the light refraction structure is arranged between the Z-BLOCK of the light receiving submodule body and the first lens and used for carrying out light path correction on light penetrating through the first lens, so that the light penetrating through the first lens is incident to the center of a window of the Z-BLOCK.

2. The rosa of claim 1, wherein the light refracting structure is a silicon wafer.

3. The rosa of claim 2, wherein the silicon wafer has a rectangular parallelepiped structure.

4. The rosa of claim 2, wherein a surface of the silicon wafer is provided with a light transmissive film;

the light-transmitting film is used for increasing the light transmittance of the silicon wafer.

5. The rosa of claim 1, wherein the rosa body further comprises: a positioning structure;

the positioning structure is used for bearing and fixing each element of the light receiving submodule body and the light refraction structure.

6. The rosa of claim 5, wherein the positioning structure is provided with a first positioning surface, a second positioning surface and a positioning line;

the first positioning surface, the second positioning surface and the positioning line are used for supporting a user to manually determine the placement position of the light refraction structure;

the second positioning surface is also used for fixing the light refraction structure.

7. The rosa of claim 1, wherein the rosa body further comprises: the optical fiber adapter, the sleeve, the second lens, the reflector, the detector and the photocurrent signal amplifying circuit;

the sleeve is arranged between the first lens and the optical fiber adapter, the second lens is arranged between the Z-BLOCK and the reflector, and the detector is electrically connected with the photocurrent signal amplifying circuit;

optical signals with different wavelengths are incident to the optical fiber adapter from optical fibers, the optical signals passing through the optical fiber adapter are divergent light and are incident to the first lens, the optical signals are changed into collimated light after passing through the first lens and are incident to the light refraction structure, the optical signals are incident to the center of a window of the Z-BLOCK after passing through the light refraction structure, the optical signals are divided into a plurality of beams of parallel light after passing through the Z-BLOCK and are incident to the second lens, the second lens controls the optical signals to be converged on the reflector, and the reflector reflects the optical signals to the detector. The detector converts the optical signal into photocurrent, and transmits the photocurrent to the photocurrent signal amplification circuit, and the photocurrent signal amplification circuit amplifies the photocurrent to obtain an electrical signal.

8. The rosa of claim 7, wherein the rosa body further comprises: a capacitor, a cover plate and a tube shell;

the capacitor is electrically connected with the photocurrent signal amplification circuit and is used for filtering interference signals in the electrical signals;

the cover plate and the tube shell form an airtight packaging cavity, and the light refraction structure, the Z-BLOCK, the second lens, the reflector, the detector, the photocurrent signal amplification circuit and the capacitor are arranged in the airtight packaging cavity;

the airtight packaging cavity is used for protecting elements inside the airtight packaging cavity from being interfered by the external environment.

9. A light module, comprising:

the rosa of any of claims 1-8.

Technical Field

The invention relates to the technical field of optical receive sub-modules, in particular to an optical receive sub-module and an optical module.

Background

Fig. 1 is a schematic diagram of an operating principle of a Wavelength Division Multiplexing (WDM) according to an embodiment of the present invention. As shown in fig. 1, the wavelength division multiplexing technology utilizes bandwidth resources of optical fibers to combine optical carrier signals with a plurality of different wavelengths together through a combiner 11 at a transmitting end, and couple the optical carrier signals to the same optical fiber for transmission, and separates optical signals with various wavelengths through a splitter 12 at a receiving end, and then further processes the optical signals to recover the optical signals into original signals by an optical receiver.

The Receiver Optical Subassembly (ROSA) is used for separating Optical signals with different wavelengths to implement a receiving function of a multi-channel high-speed signal. The DEMUX of the optical receive sub-module with the speed of 40G or above adopts a Z-BLOCK scheme, but because the center of an incident window of the Z-BLOCK is not on the same straight line with the center of an optical window of a ROSA tube shell, light beams cannot enter the center of the window of the Z-BLOCK after entering the interior of the tube shell through the optical window of the tube shell, and the transmission of optical signals is interrupted.

In the related technology, a light beam passing through the center of an optical window of a tube shell can reach the center of a window of a Z-BLOCK, and a displacement prism is adopted inside a ROSA to correct the propagation direction of the light beam. However, the shift prism has a complicated manufacturing process and a high price, so that the light receiving sub-module of the related art has the disadvantages of complicated manufacturing process and high price.

Disclosure of Invention

In view of this, a light receiving sub-module and an optical module are provided to solve the problems of complex manufacturing process and high price of the light receiving sub-module in the related art.

The invention adopts the following technical scheme:

in a first aspect, the present invention provides a rosa, comprising: the light receiving secondary module comprises a light receiving secondary module body and a light refraction structure;

the light refraction structure is arranged between the Z-BLOCK of the light receiving submodule body and the first lens and used for carrying out light path correction on light penetrating through the first lens, so that the light penetrating through the first lens is incident to the center of a window of the Z-BLOCK.

Preferably, the light refraction structure is a silicon wafer.

Preferably, the silicon wafer is of a cuboid structure.

Preferably, a light-transmitting film is arranged on the surface of the silicon wafer;

the light-transmitting film is used for increasing the light transmittance of the silicon wafer.

Preferably, the rosa body further includes: a positioning structure;

the positioning structure is used for bearing and fixing each element of the light receiving submodule body and the light refraction structure.

Preferably, the positioning structure is provided with a first positioning surface, a second positioning surface and a positioning line;

the first positioning surface, the second positioning surface and the positioning line are used for supporting a user to manually determine the placement position of the light refraction structure;

the second positioning surface is also used for fixing the light refraction structure.

Preferably, the rosa body further includes: the optical fiber adapter, the sleeve, the second lens, the reflector, the detector and the photocurrent signal amplifying circuit;

the sleeve is arranged between the first lens and the optical fiber adapter, the second lens is arranged between the Z-BLOCK and the reflector, and the detector is electrically connected with the photocurrent signal amplifying circuit;

optical signals with different wavelengths are incident to the optical fiber adapter from optical fibers, the optical signals passing through the optical fiber adapter are divergent light and are incident to the first lens, the optical signals are changed into collimated light after passing through the first lens and are incident to the light refraction structure, the optical signals are incident to the center of a window of the Z-BLOCK after passing through the light refraction structure, the optical signals are divided into a plurality of beams of parallel light after passing through the Z-BLOCK and are incident to the second lens, the second lens controls the optical signals to be converged on the reflector, and the reflector reflects the optical signals to the detector. The detector converts the optical signal into photocurrent, and transmits the photocurrent to the photocurrent signal amplification circuit, and the photocurrent signal amplification circuit amplifies the photocurrent to obtain an electrical signal.

Preferably, the rosa body further includes: a capacitor, a cover plate and a tube shell;

the capacitor is electrically connected with the photocurrent signal amplification circuit and is used for filtering interference signals in the electrical signals;

the cover plate and the tube shell form an airtight packaging cavity, and the light refraction structure, the Z-BLOCK, the second lens, the reflector, the detector, the photocurrent signal amplification circuit and the capacitor are arranged in the airtight packaging cavity;

the airtight packaging cavity is used for protecting elements inside the airtight packaging cavity from being interfered by the external environment.

In a second aspect, the present invention further provides an optical module, including: a rosa as in any of the first aspect of the present invention.

By adopting the technical scheme, the invention provides a light receiving submodule, which comprises: the light receiving secondary module comprises a light receiving secondary module body and a light refraction structure; the light refraction structure is arranged between the Z-BLOCK of the light receiving submodule body and the first lens and used for carrying out light path correction on light penetrating through the first lens, so that the light penetrating through the first lens is incident to the center of a window of the Z-BLOCK. Based on this, the invention replaces the displacement prism in the light receiving submodule of the related technology with the light refraction structure, and the light refraction structure has the advantages of simple manufacturing process and low price, so that the light receiving submodule of the invention has simple manufacturing process and low manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating an operating principle of a wavelength division multiplexing technology according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a rosa according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another rosa according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating an operating principle of an optical receive sub-module according to an embodiment of the present invention;

fig. 5 is a top view of a rosa according to an embodiment of the present invention;

fig. 6 is an oblique view of a light receiving sub-module corresponding to fig. 5;

fig. 7 is a schematic position diagram of a positioning surface and a positioning line according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Fig. 2 is a schematic structural diagram of a rosa according to an embodiment of the present invention. As shown in fig. 2, the optical receive sub-module of this embodiment includes: a light receiving sub-module body 21 and a light refracting structure 22.

The light refraction structure is disposed between the Z-BLOCK211 of the rosa body 21 and the first lens 212, and is configured to perform optical path correction on light passing through the first lens 212, so that the light passing through the first lens 212 enters the center of the window of the Z-BLOCK 211.

Specifically, the light refraction structure is a structure capable of refracting an optical signal in the prior art, and the material of the light refraction structure may be BK7 glass, N-SF11 glass, K9 glass, silicon or the like, and the shape of the light refraction structure may be set according to actual needs, which may satisfy the present application, and for example, the shape of the light refraction structure may be a rectangular parallelepiped.

It should be noted that, in the invention of the present application, the light refraction structure 22 is used to replace the displacement prism in the light-receiving sub-module in the related art, so as to reduce the manufacturing cost of the light-receiving sub-module, and simplify the manufacturing process of the light-receiving module, and the light-receiving sub-module body 21 is the prior art, and detailed description of the specific structure of the light-receiving sub-module body 21 is omitted here.

This embodiment adopts above technical scheme, a light receiving submodule, includes: the light receiving secondary module comprises a light receiving secondary module body and a light refraction structure; the light refraction structure is arranged between the Z-BLOCK of the light receiving submodule body and the first lens and used for carrying out light path correction on light penetrating through the first lens, so that the light penetrating through the first lens is incident to the center of a window of the Z-BLOCK. Therefore, the light refraction structure is adopted to replace the displacement prism in the light receiving submodule of the related art, and the light refraction structure has the advantages of simple manufacturing process and low price, so that the light receiving submodule of the embodiment has simple manufacturing process and low manufacturing cost.

Preferably, the light refraction structure is a silicon wafer. The silicon chip has the advantages of simple manufacturing process and low cost, so that the light receiving sub-module of the embodiment has corresponding advantages.

Preferably, a light-transmitting film is arranged on the surface of the silicon wafer;

the light-transmitting film is used for increasing the light transmittance of the silicon wafer.

Specifically, the printing opacity membrane is among the prior art printing opacity membrane, can realize this application can.

Fig. 3 is a schematic structural diagram of a rosa according to an embodiment of the present invention. As shown in fig. 3, the rosa of this embodiment includes: the Z-BLOCK211, the first lens 212, the fiber adapter 311, the sleeve 312, the second lens 313, the mirror 314, the detector 315, the photocurrent signal amplifying circuit 316, the positioning structure 317, the capacitor 318, the cover 319, and the package 320 are shown in fig. 3.

The optical fiber adapter 311 is used for connecting and fixing an optical fiber, and guiding an optical signal into the package 320 of the rosa. The cover plate 319 and the package 320 form a hermetic package cavity, and the light refraction structure 22, the Z-BLOCK211, the second lens 313, the mirror 314, the detector 315, the photocurrent signal amplification circuit 316, and the capacitor 318 are disposed in the hermetic package cavity; the airtight packaging cavity is used for protecting elements inside the airtight packaging cavity from being interfered by the external environment. The sleeve 312 is used to secure the fiber optic adapter 311 and the package 320. The first lens 212 serves to convert incident divergent light into parallel light. The Z-BLOCK211 is used for separating light with different wavelengths, in this embodiment, the Z-BLOCK211 is a 1-4Z-BLOCK, that is, a mixed light beam with 4 wavelengths, and can be divided into 4 light beams with different wavelengths after passing through the DEMUX of the Z-BLOCK. The second lens 313 serves to condense the parallel light into a point light source. The mirror 314 is used to reflect the point source to the surface of the detector 315. The detector 315 is used to convert the received optical signal into an electrical signal. The photocurrent signal amplifying circuit 316 may be a TIA in the prior art, and is configured to amplify the received photocurrent. The capacitor 318 is used for filtering the interference signal in the electrical signal. The positioning structure 317 is used for carrying and fixing the elements of the rosa body, and the light refraction structure.

Fig. 4 is a schematic diagram illustrating an operating principle of an rosa according to an embodiment of the present invention. As shown in fig. 4, in an actual operation process, optical signals with different wavelengths are incident to the optical fiber adapter 311 from an optical fiber, the optical signals passing through the optical fiber adapter 311 are divergent light and are incident to the first lens 212, the optical signals are changed into collimated light after passing through the first lens 212 and are incident to the light refraction structure 22, the optical signals pass through the light refraction structure 22 and are incident to the center of the window of the Z-BLOCK211, the optical signals pass through the Z-BLOCK211 and are divided into a plurality of parallel beams of light and are incident to the second lens 313, the second lens 313 controls the optical signals to converge on the reflecting mirror 314, and the reflecting mirror 314 reflects the optical signals to the detector 315. The detector 315 converts the optical signal into a photocurrent, and transmits the photocurrent to the photocurrent signal amplification circuit 316, and the photocurrent signal amplification circuit 316 amplifies the photocurrent to obtain an electrical signal. The capacitor 318 is electrically connected to the photocurrent signal amplifying circuit 316 for filtering the interference signal in the electrical signal.

Fig. 5 is a top view of a rosa according to an embodiment of the present invention. Fig. 6 is an oblique view of the rosa corresponding to fig. 5. As shown in fig. 5 and 6, the positioning structure of the present embodiment is provided with a first positioning face 511, a second positioning face 512, and a positioning line 513.

The first positioning surface 511, the second positioning surface 512 and the positioning line 513 are used to support a user to manually determine the placement position of the light refraction structure 22. In addition, the light refraction structure 22 can be placed by a high-precision chip mounter without the need for the first positioning surface 511 and the positioning line 513. After the position of putting of light refraction structure 22 is confirmed, through second locating surface 512 is fixed light refraction structure 22, be provided with glue or can realize the stickness material of this application on the second locating surface 512, so that light refraction structure 22 fixes on second locating surface 512.

Fig. 7 is a schematic position diagram of a positioning surface and a positioning line according to an embodiment of the present invention, and the viewing angles of the two sub-images in fig. 7 correspond to fig. 5 and fig. 6, respectively. As shown in fig. 7, an intersection line of the first positioning plane 511 and the XZ plane has an angle α with the Z axis on the XZ plane, and an angle β with the Y axis on the YZ plane of the positioning line 513, where α and the thickness of the light refracting structure 22 determine an adjustment amount in the X direction, and β and the thickness of the light refracting structure 22 determine an adjustment amount in the Y direction in the process of actually determining the thickness, α and β of the light refracting structure 22.

Based on one general inventive concept, the present invention also provides an optical module, including: the light receiving sub-module according to the above embodiment.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.