CN210626708U - Light splitting planar waveguide for optical power monitoring and TAP device thereof - Google Patents
Light splitting planar waveguide for optical power monitoring and TAP device thereof Download PDFInfo
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Abstract
The utility model relates to a light splitting planar waveguide for optical power monitoring, including at least a slice of substrate, each said substrate bears at least one waveguide layer, the waveguide layer outside is covered and is equipped with the apron, the waveguide layer includes signal light input waveguide mouth and signal light output waveguide mouth, still concatenate beam splitting waveguide and rotary waveguide between signal light input waveguide mouth and the signal light output waveguide mouth; and one path of the light splitting waveguide is led out from one end of the light splitting waveguide close to the rotary waveguide and is connected with a TAP output waveguide port. The utility model provides a beam split planar waveguide and TAP device thereof for optical power monitoring has simple structure, higher production efficiency, economical and practical performance and the advantage of integration performance.
Description
Technical Field
The utility model relates to a communication field mainly relates to the photoelectricity field, concretely relates to a beam split planar waveguide and applied device for optical power monitoring.
Background
In recent years, the data communication market has seen explosive growth, and its demand for optical modules has also become increasingly demanding. Low cost, low power consumption, high speed, and high packing density are the basic requirements of optical devices for data communication. The current mainstream packaging scheme is based on discrete elements such as prisms, lenses and optical filters, and realizes light path integrated output through complex light path design and a fussy coupling alignment process.
For example, prior patents: an optical module (patent No. CN 201180043204.8) in which an optical waveguide array and an optical function element array are optically coupled by a lens optical system, has high stability of characteristics, and is low cost. The optical module includes an optical waveguide array having a plurality of first light input ports and one or more first light output ports, an optical function element array, a lens optical system using one or more lenses, and a mirror inside a frame body; the array of optically functional elements has one or more second light injection ports; a lens optical system for condensing a light beam transmitted between the optical waveguide array and the optical function element array and optically coupling the optical waveguide array and the optical function element array; the mirror is configured to: the light entrance port through which the light beam transmitted through the lens optical system is incident on the optical functional element array is changed, the optical functional element array is fixed to the frame directly or through an auxiliary holder or the like, and the angle of the mirror is fixed after the angle of the mirror is adjusted, so that the optical waveguide array and the optical functional element array are optically coupled.
In the prior art, a structure of combining a plurality of discrete components is bulky, so that the cost of components is high; and has problems of difficulty in integrating a miniaturized process structure, crosstalk, and the need to collimate an optical path.
The optical power monitoring function in the prior art is generally used in optical communication devices such as EDFAs (erbium doped fiber amplifiers), raman fiber amplifiers, and RODAMs (tunable branching multiplexers). The final function is to extract the amplified (or adjusted) or amplified (or adjusted) signal light in the optical fiber link (fixed ratio extraction), which serves as a feedback mechanism to provide the most direct data source for the dynamic adjustment of the device.
Next, in the above single device, there are generally a plurality of nodes that need to be optically monitored. There is a need for low cost, centralization. Together with the recent mass use of fiber optic cables in "copper back-out" engineering, the popularity of miniaturized EDFAs has led to an increase in the overall demand for such devices year by year. Generally, a device having the optical power monitoring function is commonly referred to as a Tap PD (photodetector) in the industry, and is a hybrid photoelectric device.
For example, the patent: a mixed integrated external cavity tunable laser based on arrayed waveguide grating is disclosed (patent number: CN 201410802244.1), which is formed by coupling a semiconductor gain tube core and an optical waveguide chip end face, wherein the optical waveguide chip comprises the arrayed waveguide grating and an arrayed waveguide reflection controllable component, a resonant cavity is formed by the arrayed waveguide grating chip with controllable output end reflection and the semiconductor gain tube core, the tunable output wavelength of the laser is realized by changing the driving condition of the reflection controllable component, the output wavelength is determined by the central wavelength of each channel of the arrayed waveguide grating, and the accurate control of standard ITU-T output wavelength is realized by utilizing the arrayed waveguide grating.
In the prior art, although a semiconductor gain tube core and an optical waveguide chip are coupled to form a structure with certain integration performance, the problems of crosstalk and the need of collimating an optical path still exist; nor can the use of a turning prism and a converging lens be saved.
Therefore, in order to improve the performance, it is necessary to develop a light splitting planar waveguide suitable for optical power monitoring, which has high production efficiency, simple structure, low cost and convenient integration.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides a TAP device that is used for spectral planar waveguide of optical power monitoring and adopts this spectral planar waveguide, has simple structure, higher production efficiency, economical and practical performance and integrated performance.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a light splitting planar waveguide for optical power monitoring comprises at least one substrate, wherein each substrate is provided with at least one waveguide layer, a cover plate covers the outside of each waveguide layer, each waveguide layer comprises a signal light input waveguide port and a signal light output waveguide port, and a light splitting waveguide and a rotary waveguide are connected between the signal light input waveguide port and the signal light output waveguide port in series; and one path of the light splitting waveguide is led out from one end of the light splitting waveguide close to the rotary waveguide and is connected with a TAP output waveguide port.
In a preferred embodiment of the present invention, the turning waveguide has a curved structure or an S-shaped structure.
The utility model discloses an among the preferred technical scheme, the substrate is massive structure, and the both ends of substrate are the first terminal surface that the slope set up and the second terminal surface that the slope set up respectively.
The utility model discloses an in the preferred technical scheme, be provided with on the first terminal surface signal light input waveguide mouth with signal light output waveguide mouth, the interior contained angle that constitutes between the bottom surface of first terminal surface and substrate is oblique angle one.
In a preferred embodiment of the present invention, the TAP output waveguide port is provided on the second end surface, and an inner angle formed between the second end surface and the bottom surface of the substrate is a second oblique angle.
In a preferred embodiment of the present invention, the light splitting planar waveguide energy arrays are arranged to form a planar waveguide array.
In a preferred technical solution of the present invention, a TAP device made of the light splitting planar waveguides is adopted, an array formed by a plurality of light splitting planar waveguides is arranged in the TAP device, and a TAP output waveguide port of each light splitting planar waveguide is connected with an optical fiber array element; and the signal light input waveguide port and the signal light output waveguide port of each light splitting planar waveguide structure are connected with an optical fiber array element.
The utility model provides a defect that exists among the background art, the beneficial effects of the utility model are as follows:
the utility model discloses a light splitting planar waveguide for monitoring optical power, which has simple structure, higher production efficiency, economic and practical performance and integration performance; and a plurality of light splitting planar waveguide monomers can be arrayed and combined to form a planar waveguide array.
The utility model discloses a design a planar optical waveguide's structure, design required TAP (coupler) function. The technical scheme is that in a planar waveguide structure, optical power (as a monitored TAP output waveguide port end) to be extracted is guided to a Photodetector (PD) as one waveguide branch, and optical power (generally, signal light) not to be extracted is guided to an output end (which can be finally coupled with an optical fiber) as another waveguide branch or is used as a branch of other optical paths.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic front view of a first preferred embodiment of the present invention;
fig. 2 is a schematic side view of a first preferred embodiment of the present invention;
fig. 3 is a schematic front view of a second preferred embodiment of the present invention;
fig. 4 is a schematic side view of a second preferred embodiment of the present invention;
fig. 5 is a schematic front view of a third preferred embodiment of the present invention;
fig. 6 is a schematic side view of a third preferred embodiment of the present invention;
FIG. 7 is a schematic diagram of a third preferred embodiment of the present invention applied to an actual TAP device;
FIG. 8 is a schematic diagram of a side view of a practical TAP device according to a third preferred embodiment of the present invention;
in the figure: 1-substrate, 11-first end face, 111-first oblique angle, 12-second end face, 121-second oblique angle, 122-third oblique angle, 2-waveguide layer, 21-signal light input waveguide port, 22-light splitting waveguide, 23-rotary waveguide, 24-signal light output waveguide port, 25-TAP output waveguide port, 3-cover plate, 4-PD array element and 5-optical fiber array element.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and illustrate, by way of illustration only, the basic structure of the invention, and which therefore show only the constituents relevant to the invention.
As shown in fig. 1 to 8, a light-splitting planar waveguide for optical power monitoring includes a plurality of substrates 1, each substrate 1 carries a waveguide layer 2, a cover plate 3 covers the waveguide layer 2, the waveguide layer 2 includes a signal light input waveguide port 21 and a light-splitting waveguide 22 connected in series with the signal light input waveguide port 21, the light-splitting waveguide 22 is divided into two paths, one path is connected with a TAP output waveguide port 25, the other path is connected with one end of a rotary waveguide 23, the other end of the rotary waveguide 23 is connected with a signal light output waveguide port 24, and the rotary waveguide 23 is of a curved structure or an S-shaped structure.
In a preferred embodiment of the present invention, the substrate 1 is a block structure, and the two ends of the substrate 1 are respectively a first end surface 11 disposed obliquely and a second end surface 12 disposed obliquely. The inner angle formed between the first end surface 11 and the bottom surface of the substrate 1 is a bevel angle one 111, and the bevel angle one 111 is an acute angle. The inner included angle formed between the second end face 12 and the bottom surface of the substrate 1 is a second bevel angle 121, and the second bevel angle 121 is an acute angle or an obtuse angle. The inner included angle formed between the second end face 12 and the waveguide layer 2 is an oblique angle three 122.
In a preferred technical solution of the present invention, a TAP device of a light splitting planar waveguide for monitoring optical power is provided with an array formed by a plurality of light splitting planar waveguide structures, and a TAP output waveguide port 25 of each light splitting planar waveguide structure is connected to an optical fiber array element 5; the signal light input waveguide port 21 and the signal light output waveguide port 24 of each light-splitting planar waveguide structure are connected to the optical fiber array element 5.
Example one
As shown in fig. 1 to 2, the first end surface 11 has a signal light input waveguide port 21 and a signal light output port 24. The first end face 11 is designed to be polished and ground to form a first bevel 111 of 75-87 degrees and a first bevel 111 of 82 degrees for improving return loss. The second end face 12 is provided with a TAP output waveguide port 25. The second end face 12 is designed to be polished and ground to a bevel two 121, the bevel two 121 is 35 DEG to 46 DEG, and the bevel two 121 is preferably 41 deg. The second oblique angle 121 deflects the light from the TAP output waveguide port 25 by about 90deg for output to the receiving surface of the PD element or PD array element 4, so that total internal reflection occurs when the light travels to the surface of the waveguide layer 2, thereby saving the use of a turning prism and a condensing lens.
By means of the physical principle of optical waveguide, one optical splitting waveguide structure 22 is adopted to introduce a part of energy (which can be designed to be 1% in proportion) into the TAP waveguide port 25, and most of the energy (which can be designed to be 99% in proportion) is transmitted to the TAP output waveguide port 25 along the subsequent waveguide. A rotary waveguide structure 23 is used to return the signal light to the signal light output port 24 on the same side as the input port, so as to save the size of the device. The utility model discloses a planar optical waveguide's structure has fixed splitting ratio, and the low light is used for the optical power to survey. The output direction of the weak light can be controlled by the grinding angle.
Example two
As shown in fig. 3 to 4, as shown in fig. 1 to 2, the first end surface 11 has a signal light input waveguide port 21 and a signal light output port 24. The first end face 11 is designed to be polished and ground to form a first bevel 111 of 75-87 degrees and a first bevel 111 of 82 degrees for improving return loss. The second end face 12 is provided with a TAP output waveguide port 25. The second end face 12 is designed to be polished and ground to a bevel three 122, the bevel three 122 is 75 to 87 degrees, and the bevel three 122 is preferably 82 degrees. The light output from the TAP output waveguide port 25 is not greatly deflected, facilitating the integral assembly with a subsequently mounted PD chip.
By means of the physical principle of optical waveguide, one optical splitting waveguide structure 22 is adopted to introduce a part of energy (which can be designed to be 1% in proportion) into the TAP waveguide port 25, and most of the energy (which can be designed to be 99% in proportion) is transmitted to the TAP output waveguide port 25 along the subsequent waveguide. A rotary waveguide structure 23 is used to return the signal light to the signal light output port 24 on the same side as the input port, so as to save the size of the device. The utility model discloses a planar optical waveguide's structure has fixed splitting ratio, and the low light is used for the optical power to survey. The output direction of the weak light can be controlled by the grinding angle.
EXAMPLE III
As shown in fig. 5 to 6, unlike the first embodiment, the structure of the first embodiment is matrixed, that is, the light splitting planar waveguide structure in the first embodiment is arrayed into four groups of a, b, c and d, and each group of functions is independent, thereby realizing integration and miniaturization.
Example four
As shown in fig. 7 to 8, on the basis of the third embodiment of the present invention, the optical fiber array element 5 and the PD array element 4 are added to form a complete optical path structure of the TAP PD device array. The TAP device is internally provided with an array consisting of a plurality of groups of light splitting planar waveguide structures, and a TAP output waveguide port 25 of each light splitting planar waveguide structure is connected with the optical fiber array element 5; the signal light input waveguide port 21 and the signal light output waveguide port 24 of each light-splitting planar waveguide structure are connected to the optical fiber array element 5.
In light of the above, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A light splitting planar waveguide for optical power monitoring, comprising at least one substrate (1), each substrate (1) carrying at least one waveguide layer (2), the waveguide layer (2) being externally covered with a cover plate (3), the waveguide layer (2) comprising a signal light input waveguide port (21) and a signal light output waveguide port (24), characterized in that: a light splitting waveguide (22) and a rotary waveguide (23) are also connected in series between the signal light input waveguide port (21) and the signal light output waveguide port (24); and one path of the light splitting waveguide (22) is led out from one end close to the rotary waveguide (23) and is connected with a TAP output waveguide port (25).
2. The optical splitting planar waveguide for optical power monitoring of claim 1, wherein: the turning waveguide (23) is a curved structure or an S-shaped structure.
3. The optical splitting planar waveguide for optical power monitoring of claim 1, wherein: the base material (1) is of a block structure, and two ends of the base material (1) are respectively a first end face (11) and a second end face (12) which are obliquely arranged.
4. The optical splitting planar waveguide for optical power monitoring of claim 3, wherein: the first end face (11) is provided with the signal light input waveguide port (21) and the signal light output waveguide port (24), and an inner included angle formed between the first end face (11) and the bottom face of the base material (1) is a first oblique angle (111).
5. The optical splitting planar waveguide for optical power monitoring of claim 3, wherein: the TAP output waveguide port (25) is arranged on the second end face (12), and an inner included angle formed between the second end face (12) and the bottom surface of the base material (1) is a second oblique angle (121).
6. The optical splitting planar waveguide for optical power monitoring of claim 1, wherein: and a plurality of the light splitting planar waveguides can be arrayed and combined into a planar waveguide array.
7. A TAP device employing the light-splitting planar waveguide according to any one of claims 1 to 6, wherein: the TAP device is internally provided with an array consisting of a plurality of light splitting planar waveguides, and a TAP output waveguide port (25) of each light splitting planar waveguide is connected with the optical fiber array element (5); the signal light input waveguide port (21) and the signal light output waveguide port (24) of each light splitting planar waveguide structure are connected with an optical fiber array element (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921460074.8U CN210626708U (en) | 2019-09-04 | 2019-09-04 | Light splitting planar waveguide for optical power monitoring and TAP device thereof |
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| CN201921460074.8U CN210626708U (en) | 2019-09-04 | 2019-09-04 | Light splitting planar waveguide for optical power monitoring and TAP device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488415A (en) * | 2019-09-04 | 2019-11-22 | 苏州伽蓝致远电子科技股份有限公司 | A kind of light splitting slab guide for optical power monitoring |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488415A (en) * | 2019-09-04 | 2019-11-22 | 苏州伽蓝致远电子科技股份有限公司 | A kind of light splitting slab guide for optical power monitoring |
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