A method for adjusting the optical power of an optical emission submodule

Abstract

This invention relates to the field of optical communication technology and provides a method for adjusting the optical power of an optical transmitting submodule, comprising the following steps: S1, coupling the optical transmitting submodule; S2, after coupling, testing the output optical power of the optical fiber adapter of the optical transmitting submodule using an optical power meter; S3, selecting a glass plate with a corresponding attenuation amount according to the output optical power value to ensure that the output optical power of the optical fiber adapter reaches a specified optical power range; S4, fixing the glass plate; S5, curing the entire product with adhesive. This invention places the optical power attenuation after lens coupling, eliminating the influence of optical power drop during coupling and lens UV / baking curing. It allows for optical power attenuation based on the actual output optical power of the optical fiber adapter, thereby ensuring that the output optical power of the optical fiber adapter meets the specified optical power requirements.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, specifically to a method for adjusting the optical power of an optical transmitting submodule. Background Technology

[0002] Figure 1 This is a schematic diagram of a typical single-path optical emission submodule, including a device housing, a laser, a collimating lens to collimate the light emitted from the laser, a converging lens to couple the collimated light into the fiber optic adapter, and isolators, among other components. The fabrication steps of the optical emission submodule are as follows:

[0003] 1. Secure the fiber optic adapter, isolator, laser, etc., to the device housing in a passive manner;

[0004] 2. Power on the laser, adjust the position of the converging lens, and fix the converging lens by monitoring the optical power output of the fiber optic adapter;

[0005] 3. Power on the laser, monitor the output optical power of the fiber optic adapter, adjust the position of the collimating lens to maximize the optical power, and then adjust the lens position towards the laser (so that the laser's emission point is not at the focal point of the lens, i.e., perform defocusing) to reduce the optical power to the specified optical power range to complete the coupling of the collimating lens, and then apply UV glue to fix the lens.

[0006] Figure 1 The optical emission submodule shown uses defocusing to attenuate optical power, and then fixes the lens with UV adhesive. Typically, the UV adhesive shrinks / expands during UV curing and baking, causing changes in the final optical path and consequently altering the optical power output of the fiber optic adapter. In severe cases, this can lead to substandard optical power. This is especially true in situations like... Figure 2 During the coupling process of the multiplexed optical transmitter submodule shown, the problem of optical power drop is more serious due to the longer optical path from the collimating lens to the fiber optic adapter. Summary of the Invention

[0007] The purpose of this invention is to provide a method for adjusting the optical power of an optical emission submodule, which can at least solve some of the defects in the prior art.

[0008] To achieve the above objectives, embodiments of the present invention provide the following technical solution: a method for adjusting the optical power of an optical emission submodule, comprising the following steps:

[0009] S1, couples the optical emission submodule.

[0010] S2, After coupling is complete, use an optical power meter to test the output optical power of the fiber optic adapter of the optical transmitting submodule.

[0011] S3, Select a glass plate with a corresponding attenuation based on the output optical power value to ensure that the output optical power of the fiber optic adapter reaches the specified optical power range.

[0012] S4, Fix the glass sheet.

[0013] S5, cure the glue on the entire product.

[0014] Furthermore, both light-transmitting surfaces of the glass sheet are coated with an anti-reflection film, allowing for different light power attenuation levels by selecting glass sheets of varying thicknesses.

[0015] Furthermore, the glass sheet is disposed between the converging lens and the isolator of the light emitting submodule.

[0016] Furthermore, the glass sheet is bonded between the converging lens and the isolator of the light emitting submodule.

[0017] Furthermore, the glass sheet is fixed using UV adhesive.

[0018] Furthermore, the coupling of the optical emission sub-module is specifically as follows:

[0019] S10 houses the laser, collimating lens, converging lens, and isolator within the device housing.

[0020] S11, Power on the laser and couple and fix the converging lens.

[0021] S12, then power on the laser and couple and fix the collimating lens.

[0022] Furthermore, in step S11, the converging lens is coupled and fixed by monitoring the optical power output of the fiber optic adapter.

[0023] Furthermore, in step S12, the position of the collimating lens is adjusted by monitoring the output optical power of the fiber optic adapter to maximize the optical power, and then UV glue is applied to fix the collimating lens.

[0024] Furthermore, after coupling is complete, the unfinished product is placed in an oven to cure the adhesive first.

[0025] Furthermore, in step S5, the adhesive is cured again in an oven.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. By placing the optical power attenuation after lens coupling, the influence of optical power drop during coupling and lens UV / baking curing is eliminated. Optical power attenuation can be performed according to the actual output optical power of the fiber optic adapter, so that the output optical power of the fiber optic adapter meets the optical power specification requirements.

[0028] 2. Optical power attenuation is not achieved by defocusing the collimating lens, thus ensuring that the light from the collimating lens is collimated and that the light spot reaching the fiber end face of the fiber adapter during coupling is minimized. When the collimating lens is fixed, even a slight shift in its position causing a change in the light spot can result in a significant change in optical power. This makes it easier to detect anomalies during coupling, allowing for timely screening and recoupling of products with coupling issues. (If defocusing the collimated light were used to attenuate optical power, the final light spot coupled to the fiber end face of the fiber adapter would be larger. When the collimating lens is fixed, the slight shift in its position causing a change in the light spot would be less noticeable, greatly increasing the difficulty of detecting coupling anomalies and making it harder to screen out products with coupling issues in a timely manner.) Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a typical single-path optical emission submodule;

[0030] Figure 2 This is a schematic diagram of a typical 4-way multiplexed optical emission submodule;

[0031] Figure 3 This is a schematic diagram of the structure of an optical emission submodule provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the optical path of a light-emitting submodule without an added glass plate, provided by an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the optical path of adding a glass plate to an optical emission sub-module according to an embodiment of the present invention;

[0034] In the attached diagram, the following labels are used: 1-Laser; 2-Colliding lens; 3-Converging lens; 4-Glass plate; 5-Isolator; 6-Device housing; 7-Fiber optic adapter. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 3 , Figure 4 and Figure 5 This invention provides a method for adjusting the optical power of an optical transmitting submodule. The method includes: S1, coupling the optical transmitting submodule; S2, after coupling, testing the output optical power of the fiber optic adapter 7 of the optical transmitting submodule using an optical power meter; S3, selecting a glass plate 4 with a corresponding attenuation amount based on the output optical power value to ensure the output optical power of the fiber optic adapter 7 reaches a specified range; S4, fixing the glass plate 4; and S5, curing the entire product with adhesive. In this embodiment, the optical power attenuation is performed after lens coupling, eliminating the impact of optical power drop during coupling and lens UV / baking curing. Optical power attenuation can be performed based on the actual output optical power of the fiber optic adapter 7, thus ensuring that the output optical power of the fiber optic adapter 7 meets the specifications. The optical power attenuation is not achieved by defocusing the collimating lens 2, effectively ensuring that the light from the collimating lens 2 is collimated and that the light spot reaching the fiber end face of the fiber optic adapter 7 during coupling is minimized. When collimating lens 2 is fixed, even a slight shift in the position of the collimating lens 2 can result in a significant change in optical power. This makes it easy to detect the anomaly during coupling, allowing products with coupling anomalies to be screened out and recoupled. (If defocusing the collimated light is used to attenuate the optical power, the optical spot coupled to the fiber end face of the fiber adapter 7 will become larger. When collimating lens 2 is fixed, the slight shift in the position of the collimating lens 2 that causes a change in optical power will become less noticeable, greatly increasing the difficulty of detecting coupling anomalies and making it harder to screen out products with coupling anomalies in a timely manner.)

[0037] As an optimized solution for an embodiment of the present invention, please refer to Figure 3 , Figure 4 and Figure 5 Both light-transmitting surfaces of the glass plate 4 are coated with anti-reflection films. Different thicknesses of glass plates 4 are used to select different levels of optical power attenuation. In this embodiment, the invention employs a structure that adds a glass plate 4 between the converging lens 3 and the fiber optic adapter 7 to attenuate optical power. The attenuation principle is as follows... Figure 4 As shown, when the glass plate 4 is added, the focal point of the parallel light after passing through the converging lens 3 becomes longer and enters the interior of the fiber core of the fiber adapter 7. The light spot coupled to the end face of the fiber core of the fiber adapter 7 becomes larger, thereby achieving the purpose of reducing optical power. The glass plate 4 used in this invention has anti-reflection coatings on both light-transmitting surfaces, and different thicknesses of the glass plate 4 correspond to different optical power attenuation.

[0038] As an optimized solution for an embodiment of the present invention, please refer to Figure 3 , Figure 4 and Figure 5The glass sheet 4 is disposed between the converging lens 3 and the isolator 5 of the light-emitting submodule. The glass sheet 4 is adhered between the converging lens 3 and the isolator 5 of the light-emitting submodule. UV adhesive is used to fix the glass sheet 4. In this embodiment, the glass sheet 4 is disposed between the converging lens 3 and the isolator 5.

[0039] As an optimized solution for an embodiment of the present invention, please refer to Figure 3 , Figure 4 and Figure 5 The coupling of the optical emission sub-module specifically involves the following steps: S10, placing the laser 1, collimating lens 2, converging lens 3, and isolator 5 within the device housing 6; S11, powering on the laser 1 and coupling and fixing the converging lens 3; S12, powering on the laser 1 again and coupling and fixing the collimating lens 2. In step S11, the converging lens 3 is coupled and fixed by monitoring the optical power output of the fiber optic adapter 7. In step S12, the position of the collimating lens 2 is adjusted by monitoring the output optical power of the fiber optic adapter 7 to maximize the optical power, and then UV adhesive is applied to fix the collimating lens 2. In this embodiment, the coupling method utilizes optical power for coupling, achieving a precise coupling effect.

[0040] As an optimized embodiment of the present invention, after coupling is completed, the unfinished product is placed in an oven to cure the adhesive first. In step S5, the adhesive is cured again in an oven. In this embodiment, multiple curing processes in the oven result in a more stable product.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for adjusting the optical power of an optical emitting submodule, characterized in that, Includes the following steps: S1, couples the optical emission submodule. S2, After coupling is complete, use an optical power meter to test the output optical power of the fiber optic adapter of the optical transmitting submodule. S3, Select a glass plate with a corresponding attenuation based on the output optical power value to ensure that the output optical power of the fiber optic adapter reaches the specified optical power range. S4. Fix the glass plate, which is positioned between the converging lens and the isolator of the light-emitting submodule. This allows the attenuation of optical power to occur after lens coupling, eliminating the effects of power drop during coupling and lens UV / baking curing. S5, cure the glue on the entire product.

2. The method for adjusting the optical power of an optical emission submodule as described in claim 1, characterized in that: Both light-transmitting surfaces of the glass sheet are coated with an anti-reflection film, and different optical power attenuation can be selected by choosing glass sheets of different thicknesses.

3. The method for adjusting the optical power of an optical emission submodule as described in claim 1, characterized in that: The glass sheet is attached between the converging lens and the isolator of the light emitting submodule.

4. The method for adjusting the optical power of an optical emission submodule as described in claim 1, characterized in that: The glass sheet is fixed with UV adhesive.

5. The method for adjusting the optical power of an optical emission submodule as described in claim 1, characterized in that, The coupling of the optical emission sub-module is specifically as follows: S10 houses the laser, collimating lens, converging lens, and isolator within the device housing. S11, Power on the laser and couple and fix the converging lens. S12, then power on the laser and couple and fix the collimating lens.

6. The method for adjusting the optical power of an optical emission submodule as described in claim 5, characterized in that: In step S11, the converging lens is coupled and fixed by monitoring the optical power output of the fiber optic adapter.

7. The method for adjusting the optical power of an optical emission submodule as described in claim 5, characterized in that: In step S12, the position of the collimating lens is adjusted by monitoring the output optical power of the fiber optic adapter to maximize the optical power, and then UV glue is applied to fix the collimating lens.

8. The method for adjusting the optical power of an optical emission submodule as described in claim 1, characterized in that: After coupling is complete, the unfinished product is placed in an oven to cure the adhesive first.

9. The method for adjusting the optical power of an optical emission submodule as described in claim 1, characterized in that: In step S5, the adhesive is cured again in an oven.

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