CN114114562A - Multimode fiber array light receiving coupling device and method - Google Patents
Multimode fiber array light receiving coupling device and method Download PDFInfo
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- CN114114562A CN114114562A CN202111450781.0A CN202111450781A CN114114562A CN 114114562 A CN114114562 A CN 114114562A CN 202111450781 A CN202111450781 A CN 202111450781A CN 114114562 A CN114114562 A CN 114114562A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
- G02B6/4225—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements by a direct measurement of the degree of coupling, e.g. the amount of light power coupled to the fibre or the opto-electronic element
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- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a multimode fiber array light receiving and coupling device, which comprises: the device comprises a multimode fiber array, an optical power meter and an optical transmission medium, wherein the multimode fiber array is connected with the optical power meter through an MMF (millimeter-wave) fiber, the inclination angle of the end face of the input end of the multimode fiber array is consistent with the inclination angle of the end face of the output end of an AWG (arrayed waveguide grating) optical chip, light output by the AWG optical chip is guided to the multimode fiber array through the optical transmission medium and transmitted to the optical power meter, and the optical power meter monitors and displays the optical power output by the AWG optical chip so as to adjust the coupling position of a connector and the AWG optical chip; by the scheme, stray light transmitted by the substrate in the coupling process of the quartz-based AWG optical chip can be prevented from entering the multimode optical fiber array, the influence of the stray light on the reading of the optical power meter is greatly reduced, and the coupling accuracy is ensured; the multimode fiber array has the advantages of low cost, simple replacement and cleaning, reference line of fiber cores of the fibers and the waveguide at the output end of the optical chip, and coupling efficiency improvement.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a multimode optical fiber array light receiving and coupling device and a multimode optical fiber array light receiving and coupling method.
Background
In the five years of the future, cloud and 5G application will lead the market demand of optical modules to increase, and under the stimulation of the sharp increase of the demand of information capacity, the optical module market (including China) will be developed rapidly, and meanwhile, the AWG optical chip which is an important part of the optical module will have huge market demand. The AWG chip based on the planar optical waveguide technology has adopted monocrystalline silicon as a substrate for a long time, and actually, with popularization and development of communication, higher requirements are placed on cost control of raw material parts, and the monocrystalline silicon material of the chip is manufactured by replacing the quartz material.
When an optical component is produced by coupling an AWG optical chip in the prior art, referring to fig. 1 and 2, a laser light source 6 is connected with a connector 5 through an SMF fiber 7, the right end of the connector 5 corresponds to the input end of an AWG optical chip 4 with a quartz substrate and is coupled through UV glue, the output end of the AWG optical chip is provided with an inclined plane, light (λ 1, λ 2, λ 3, λ 4) emitted from the output end of the AWG optical chip is reflected upwards through the inclined plane of the output end to enter a large-area PD 8(PD is a photodiode), air exists between the PD and the AWG optical chip, the PD is connected with an optical power meter 2 through an electrical signal line 9, the optical power output by the AWG optical chip is monitored through the optical power meter, and then the optimal coupling position of the connector and the input end of the AWG optical chip is adjusted. The AWG optical chip using the quartz substrate may generate the following defects in the coupling and light receiving process: because the chip substrate is made of quartz similar to waveguide materials, light can be transmitted as well, and part of light which is not coupled into the waveguide can be introduced into PD, so that an optical power meter cannot monitor an accurate numerical value, and coupling cannot be carried out; large-area PD is adopted, and the PD is expensive and easy to damage, so that the maintenance and replacement cost is high; the influence of the cleaning condition of the surface of the product or the surface of the PD on the monitored optical power is large, the requirements on the surface cleanliness of the AWG optical chip and the surface cleanliness of the PD are high in actual production, and the cleaning difficulty of the light emitting position and the light receiving position of the PD is large; the optimal monitoring positions of the output ends of the PD and AWG optical chips are different due to certain difference of each product, the process of adjusting the coupling position and the receiving optical position is longer, and the coupling efficiency is low.
Disclosure of Invention
In order to overcome the technical defects in the prior art, the present invention provides a multimode fiber array light receiving and coupling device and method to solve the above technical problems.
The technical scheme adopted by the invention for solving the technical problem is as follows:
according to one aspect of the present invention, a multimode fiber array light receiving and coupling device is provided, which includes: the optical transmission medium is used for being arranged between the input end face of the multimode optical fiber array and the output end face of the AWG optical chip and contacting with the two end faces, light output by the AWG optical chip is guided to the multimode optical fiber array through the optical transmission medium and transmitted to the optical power meter, and the optical power output by the AWG optical chip is monitored and displayed through the optical power meter so as to adjust the coupling position of the connector and the AWG optical chip.
By the scheme, stray light transmitted by the substrate in the coupling process of the quartz-based AWG optical chip can be prevented from entering the multimode optical fiber array, the influence of the stray light on the reading of the optical power meter is greatly reduced, and the coupling accuracy is ensured; the multimode fiber array has low cost and is simple to replace and clean, the fiber core of the fiber and the waveguide at the output end of the optical chip can be subjected to reference line, and the coupling efficiency is improved; the repeatability and reproducibility of the optical parameters of the product on the machine are good, and the coupling reliability is high.
In order to better solve the technical defects, the invention also has a better technical scheme that:
in some embodiments, the light-transmitting medium is alcohol.
In some embodiments, the optical transmission medium is glycerol.
In some embodiments, the distance L1 between the input end face of the multimode fiber array and the output end face of the AWG photonic chip is: l1 is more than 0 and less than or equal to 50 mu m. Thereby, it is ensured that a sufficient light intensity is received.
According to another aspect of the present invention, a method for coupling and receiving light of a multimode fiber array is provided, which comprises the following steps:
the input end of the multimode fiber array corresponds to the output end of the AWG optical chip, the end face of the input end of the multimode fiber array is controlled to be parallel to the end face of the output end of the AWG optical chip, and the distance L1 between the two end faces is controlled as follows: l1 is more than 0 and less than or equal to 50 mu m;
connecting the multimode fiber array with an optical power meter through an MMF fiber;
arranging an optical transmission medium between the end face of the input end of the multimode fiber array and the end face of the output end of the AWG optical chip, contacting with the two end faces, and guiding light to the multimode fiber array and transmitting the light to an optical power meter;
and monitoring and displaying the optical power output by the AWG optical chip through an optical power meter, and adjusting the coupling position of the connector and the AWG optical chip.
According to another aspect of the present invention, a method for coupling and receiving light of a multimode fiber array is provided, which comprises the following steps:
connecting a laser light source with a connector through an SMF optical fiber, and controlling the right end face of the SMF optical fiber to be flush with the right end face of the connector;
the right end of the connector corresponds to the input end of the AWG optical chip, the right end face of the connector is controlled to be parallel to the input end face of the AWG optical chip, and the distance L2 between the two end faces is controlled to be: l2 is more than or equal to 5 and less than or equal to 20 mu m;
the input end of the multimode fiber array corresponds to the output end of the AWG optical chip, the end face of the input end of the multimode fiber array is controlled to be parallel to the end face of the output end of the AWG optical chip, and the distance L1 between the two end faces is controlled as follows: l1 is more than 0 and less than or equal to 50 mu m;
connecting the multimode fiber array with an optical power meter through an MMF fiber;
arranging an optical transmission medium between the end face of the input end of the multimode fiber array and the end face of the output end of the AWG optical chip, contacting with the two end faces, and guiding light to the multimode fiber array and transmitting the light to an optical power meter;
the coupling transmission medium is arranged between the right end surface of the connector and the input end surface of the AWG optical chip and is in contact with the two end surfaces;
and starting the laser light source, monitoring and displaying the optical power output by the AWG optical chip through an optical power meter, and adjusting the coupling position of the connector and the AWG optical chip.
In some embodiments, the coupling transmission medium is UV glue.
In some embodiments, the input end face of the AWG photonic chip is tilted at an angle of 80-85 °.
In some embodiments, the output end face of the AWG optical chip is inclined at an angle of 40-45 degrees.
In some embodiments, the light-transmitting medium is alcohol or glycerol.
Drawings
FIG. 1 is a schematic front view of a conventional coupling device;
FIG. 2 is a schematic top view of a conventional coupling device;
fig. 3 is a schematic structural diagram of a multimode fiber array light receiving and coupling device according to an embodiment of the present invention;
FIG. 4 is a schematic top view of a multimode fiber array light-receiving coupling device;
reference numerals:
1. a multimode fiber array; 2. an optical power meter; 3. an MMF optical fiber; 4. an AWG optical chip; 5. a connector; 6. a laser light source; 7. an SMF fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example one
Referring to fig. 3 and 4, the optical coupling device for receiving light of the multimode fiber array 1 provided by the present invention includes: multimode fiber array 1, optical power meter 2 and optical transmission medium.
The multimode fiber array 1 is connected with an optical power meter 2 through an MMF fiber 3, wherein the optical power meter 2 is a four-channel optical power meter and is connected with the four-channel optical power meter through four 62.5/125MMF fibers.
The inclination angle of the input end face of the multimode fiber array 1 is consistent with the inclination angle of the output end face of the AWG optical chip 4, wherein, when coupling is performed, the distance L1 between the input end face of the multimode fiber array 1 and the output end face of the AWG optical chip 4 is controlled to be: l1 is more than 0 and less than or equal to 50 μm, L1 can be any distance of 10 μm, 20 μm, 30 μm, 40 μm and 50 μm, and the distance is selected according to the situation.
The optical transmission medium is alcohol or glycerol, and is arranged between the end face of the input end of the multimode fiber array 1 and the end face of the output end of the AWG optical chip 4 and is in contact with the two end faces.
The light output by the AWG optical chip 4 is guided to the multimode fiber array 1 through an optical transmission medium and transmitted to the optical power meter 2, and the optical power output by the AWG optical chip 4 is monitored and displayed through the optical power meter 2, so that the coupling position of the connector 5 and the AWG optical chip 4 is adjusted. The wavelengths of the light λ 1, λ 2, λ 3, λ 4 output by the AWG optical chip 4 are 1271,1291,1311,1331.
Example two
Referring to fig. 3 and 4, the method for receiving and coupling light of the multimode fiber array 1 provided by the present invention includes the following steps:
the input end of the multimode fiber array 1 corresponds to the output end of the AWG optical chip 4, the end face of the input end of the multimode fiber array 1 is controlled to be parallel to the end face of the output end of the AWG optical chip 4, and the distance L1 between the two end faces is controlled to be: l1 is more than 0 and less than or equal to 50 μm, L1 can be any one of the distances of 10 μm, 20 μm, 30 μm, 40 μm and 50 μm, the distance is selected according to the situation, the inclination angle of the output end face of the AWG optical chip 4 is 40-45 °, can be any one of the inclination angles of 40 °, 41 °, 43 ° and 45 °, and the inclination angle is preferably 41 ° in the embodiment.
The multimode fiber array 1 is connected with an optical power meter 2 through an MMF fiber 3, further, the optical power meter 2 is a four-channel optical power meter, and the multimode fiber array 1 is connected with the four-channel optical power meter through four 62.5/125MMF fibers.
And arranging an optical transmission medium between the end face of the input end of the multimode fiber array 1 and the end face of the output end of the AWG optical chip 4 and contacting with the two end faces, wherein the optical transmission medium is alcohol or glycerol and is used for guiding light to the multimode fiber array 1 and transmitting the light to the optical power meter 2.
The optical power output by the AWG optical chip 4 is monitored and displayed by the optical power meter 2, and the coupling position of the connector 5 and the AWG optical chip 4 is adjusted. The wavelengths of the light λ 1, λ 2, λ 3, λ 4 output by the AWG optical chip 4 are 1271,1291,1311,1331.
EXAMPLE III
Referring to fig. 3 and 4, another method for receiving and coupling light of the multimode fiber array 1 provided by the present invention includes the following steps:
the laser light source 6 is connected with the connector 5 through 9/125SMF optical fiber 7, and the right end face of the SMF optical fiber 7 is controlled to be flush with the right end face of the connector 5. The stable laser light source 6 inputs monochromatic light 1271,1291,1331,1331 with different wavelengths and certain optical power.
The right end of the connector 5 is corresponding to the input end of the AWG optical chip 4, the right end face of the connector 5 is controlled to be parallel to the input end face of the AWG optical chip 4, and the distance L2 between the two end faces is controlled to be: l2 is not less than 5 and not more than 20 μm, wherein L2 may be any one of distances of 5 μm, 10 μm, 15 μm and 20 μm, and the distance is selected according to the situation, the inclination angle β of the input end face of the AWG optical chip 4 is 80-85 °, β may be any one of inclination angles of 80 °, 82 °, 83 ° and 85 °, and in this embodiment, the inclination angle β is preferably 82 °.
The input end of the multimode fiber array 1 corresponds to the output end of the AWG optical chip 4, the end face of the input end of the multimode fiber array 1 is controlled to be parallel to the end face of the output end of the AWG optical chip 4, and the distance L1 between the two end faces is controlled to be: l1 is greater than 0 and less than or equal to 50 μm, L1 can be any one of distances of 10 μm, 20 μm, 30 μm, 40 μm and 50 μm, the distance is selected according to the situation, the inclination angle α of the output end face of the AWG optical chip 4 is 40-45 °, α can be any one of inclination angles of 40 °, 41 °, 43 ° and 45 °, and the inclination angle α is preferably 41 ° in the embodiment.
The multimode fiber array 1 is connected with an optical power meter 2 through an MMF fiber 3, further, the optical power meter 2 is a four-channel optical power meter 2, and the multimode fiber array 1 is connected with the four-channel optical power meter through four 62.5/125MMF fibers.
And arranging an optical transmission medium between the end face of the input end of the multimode fiber array 1 and the end face of the output end of the AWG optical chip 4 and contacting with the two end faces, wherein the optical transmission medium is alcohol or glycerol and is used for guiding light to the multimode fiber array 1 and transmitting the light to the optical power meter 2.
And a coupling transmission medium is arranged between the right end face of the connector 5 and the input end face of the AWG optical chip 4 and is in contact with the two end faces, wherein the coupling transmission medium is UV glue.
The laser source 6 is started, the optical power output by the AWG optical chip 4 is monitored and displayed through the optical power meter 2, and the coupling position of the connector 5 and the AWG optical chip 4 is adjusted. The wavelengths of the light λ 1, λ 2, λ 3, λ 4 output by the AWG optical chip 4 are 1271,1291,1311,1331.
By the scheme, stray light transmitted by the substrate in the coupling process of the quartz-based AWG optical chip can be prevented from entering the multimode optical fiber array, the influence of the stray light on the reading of the optical power meter is greatly reduced, and the coupling accuracy is ensured; the multimode fiber array has low cost and is simple to replace and clean, the fiber core of the fiber and the waveguide at the output end of the optical chip can be subjected to reference line, and the coupling efficiency is improved; the repeatability and reproducibility of the optical parameters of the product on the machine are good, and the coupling reliability is high.
The above description is only for the embodiments of the present invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A multimode fiber array light receiving and coupling device is characterized by comprising: the optical transmission medium is used for being arranged between the input end face of the multimode optical fiber array and the output end face of the AWG optical chip and contacting with the two end faces, light output by the AWG optical chip is guided to the multimode optical fiber array through the optical transmission medium and transmitted to the optical power meter, and the optical power output by the AWG optical chip is monitored and displayed through the optical power meter so as to adjust the coupling position of the connector and the AWG optical chip.
2. The multimode fiber array light-receiving coupling device of claim 1, wherein the light transmission medium is alcohol.
3. The multimode fiber array light-receiving coupling device of claim 1, wherein the light transmission medium is glycerol.
4. The multimode fiber array photocoupling device of claim 1, wherein the distance L1 between the input end face of the multimode fiber array and the output end face of the AWG microchip is: l1 is more than 0 and less than or equal to 50 mu m.
5. A light receiving and coupling method of a multimode fiber array is characterized by comprising the following steps:
the input end of the multimode fiber array corresponds to the output end of the AWG optical chip, the end face of the input end of the multimode fiber array is controlled to be parallel to the end face of the output end of the AWG optical chip, and the distance L1 between the two end faces is controlled as follows: l1 is more than 0 and less than or equal to 50 mu m;
connecting the multimode fiber array with an optical power meter through an MMF fiber;
arranging an optical transmission medium between the end face of the input end of the multimode fiber array and the end face of the output end of the AWG optical chip, contacting with the two end faces, and guiding light to the multimode fiber array and transmitting the light to an optical power meter;
and monitoring and displaying the optical power output by the AWG optical chip through an optical power meter, and adjusting the coupling position of the connector and the AWG optical chip.
6. A light receiving and coupling method of a multimode fiber array is characterized by comprising the following steps:
connecting a laser light source with a connector through an SMF optical fiber, and controlling the right end face of the SMF optical fiber to be flush with the right end face of the connector;
the right end of the connector corresponds to the input end of the AWG optical chip, the right end face of the connector is controlled to be parallel to the input end face of the AWG optical chip, and the distance L2 between the two end faces is controlled to be: l2 is more than or equal to 5 and less than or equal to 20 mu m;
the input end of the multimode fiber array corresponds to the output end of the AWG optical chip, the end face of the input end of the multimode fiber array is controlled to be parallel to the end face of the output end of the AWG optical chip, and the distance L1 between the two end faces is controlled as follows: l1 is more than 0 and less than or equal to 50 mu m;
connecting the multimode fiber array with an optical power meter through an MMF fiber;
arranging an optical transmission medium between the end face of the input end of the multimode fiber array and the end face of the output end of the AWG optical chip, contacting with the two end faces, and guiding light to the multimode fiber array and transmitting the light to an optical power meter;
the coupling transmission medium is arranged between the right end surface of the connector and the input end surface of the AWG optical chip and is in contact with the two end surfaces;
and starting the laser light source, monitoring and displaying the optical power output by the AWG optical chip through an optical power meter, and adjusting the coupling position of the connector and the AWG optical chip.
7. The method according to claim 6, wherein the coupling transmission medium is UV glue.
8. The method of claim 6, wherein the input end face of the AWG photonic chip is tilted at an angle of 80-85 °.
9. The method of claim 6, wherein the output end face of the AWG photonic chip is tilted at an angle of 40-45 °.
10. The method as claimed in claim 6, wherein the optical transmission medium is alcohol or glycerol.
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