CN112764175B - Coupling assembly method and coupling assembly system of multi-channel laser transmitter - Google Patents
Coupling assembly method and coupling assembly system of multi-channel laser transmitter Download PDFInfo
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- CN112764175B CN112764175B CN202110118062.2A CN202110118062A CN112764175B CN 112764175 B CN112764175 B CN 112764175B CN 202110118062 A CN202110118062 A CN 202110118062A CN 112764175 B CN112764175 B CN 112764175B
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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
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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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
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
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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
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/421—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical component consisting of a short length of fibre, e.g. fibre stub
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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
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
Abstract
The invention discloses a coupling assembly method and a coupling assembly system of a multi-channel laser transmitter, wherein the method comprises the following steps: installing and fixing the wavelength division multiplexer and the optical fiber ferrule, and placing the convergent lens between the wavelength division multiplexer and the optical fiber ferrule; applying a coupling light source to the fiber stub; adjusting a converging lens, and fixing the converging lens when optical parameters of each light beam decomposed by the coupling light source through the multi-channel input end of the wavelength division multiplexer meet preset requirements; installing and fixing a laser chip set, and placing each collimating lens between the laser chip set and the wavelength division multiplexer; and electrifying the laser chip according to a preset rule, adjusting the collimating lenses to enable the optical power of the optical fiber inserting core light outlet to meet a preset value, and determining and fixing the positions of the collimating lenses. The invention avoids the influence of the installation tolerance of the collimating lens on the installation of the convergent lens, simultaneously avoids the problem that extra collimating lens groups are needed to perform power balance, simplifies the coupling process and improves the efficiency of coupling assembly.
Description
Technical Field
The invention relates to the technical field of laser, in particular to a coupling assembly method and a coupling assembly system of a multi-channel laser transmitter.
Background
In a multi-channel laser transmitter, the coupling effect of each optical device largely determines the efficiency and quality of laser output, so that the positions of some optical devices need to be repeatedly fine-tuned to realize coupling in the assembling process of the multi-channel laser transmitter.
Fig. 1 illustrates a light path of a multi-channel laser transmitter in the prior art, where the light emitting directions of the optical devices are sequentially as follows: the device comprises a laser chip set, a collimating lens set, a wavelength division multiplexer, a converging lens and an optical fiber inserting core. The assembly coupling mode of the existing multi-channel laser transmitter is generally as follows: firstly fixing a laser chip set, a wavelength division multiplexer and an optical fiber ferrule in a passive mode, then electrifying the laser chip set, monitoring optical parameters of an optical fiber ferrule light outlet on a forward light path through a power meter or a light beam quality analyzer so as to couple a collimating lens set; and after the collimating lens group is well coupled, coupling the converging lens until the coupling optical power of the optical fiber inserting core light outlet is maximum. Because the number of the collimating lenses in the collimating lens group is generally at least 4 or 8 or even more, and each collimating lens has an installation tolerance when actually installed, the more the number of the collimating lenses is, the more the coupling difficulty of the converging lens is likely to increase, and therefore, the assembly method of firstly coupling the collimating lenses and then coupling the converging lens seriously affects the coupling assembly efficiency of the multi-channel laser emitter.
Disclosure of Invention
In view of the above problems, it is necessary to provide a coupling assembly method for a multi-channel laser transmitter to solve or partially solve the above problems, and the technical solution proposed by the present invention is as follows:
installing and fixing a wavelength division multiplexer and an optical fiber ferrule, and placing a convergent lens at a preset position between the wavelength division multiplexer and the optical fiber ferrule;
applying a coupling light source to the optical fiber inserting core, wherein each optical wavelength of the coupling light source is consistent with the optical wavelength emitted by the multi-channel laser;
adjusting a converging lens, and fixing the converging lens when optical parameters of each light beam decomposed by the multi-channel input end of the wavelength division multiplexer of the coupling light source meet preset requirements;
installing and fixing a laser chip set, respectively aligning each laser chip with each input channel of the wavelength division multiplexer, and placing each collimating lens at a preset position between the laser chip set and the wavelength division multiplexer;
and electrifying the laser chip according to a preset rule, adjusting the collimating lenses to enable the optical power of the optical fiber inserting core light outlet to meet a preset value, and determining and fixing the positions of the collimating lenses.
Further, when the optical parameters of each light beam split by the coupling light source through the multi-channel input end of the wavelength division multiplexer meet the preset requirements, the adjusting of the convergent lens specifically comprises:
the optical parameter detection equipment is arranged on one side of the multi-channel input end of the wavelength division multiplexer, the position of the convergent lens is adjusted until the optical parameters of each light beam meet preset requirements, and the convergent lens is fixed, wherein the optical parameters at least comprise the position, the ellipticity and the Gaussian diameter of a light spot.
Further, the optical parameter detection device is moved along the optical path direction of each split light beam, and if the optical parameters detected by the optical parameter detection device at different positions meet the preset requirements, the convergent lens is fixed.
Further, the energizing the laser chip according to the preset rule, adjusting the collimating lenses to make the optical power of the optical fiber ferrule light outlet meet the preset value, and determining and fixing the positions of the collimating lenses specifically comprises:
and electrifying one laser chip every time, adjusting a collimating lens corresponding to the laser chip, and closing the laser chip and fixing the collimating lens when the optical power of the optical fiber inserting core light outlet reaches a preset value.
Further, the energizing the laser chip according to the preset rule, adjusting the collimating lenses to make the optical power of the optical fiber ferrule light outlet meet the preset value, and determining and fixing the positions of the collimating lenses specifically comprises:
respectively electrifying laser chips at two edges of a laser chip group, adjusting collimating lenses corresponding to the electrified laser chips, and when the optical power of an optical fiber inserting core light outlet reaches a preset value, closing the laser chips and fixing the collimating lenses to sequentially obtain the positions of the collimating lenses at the two edges;
and fixing each collimating lens between the two edge collimating lenses at the intersection of a straight line formed by connecting the positions of the two edge collimating lenses and the input light path of the wavelength division multiplexer.
Further, the coupling assembling method of the multi-channel laser transmitter further comprises the following steps: when the laser chip set is installed and fixed, the isolator is also installed at a preset position, so that the isolator is coaxial with the wave combination output end and the converging lens of the wavelength division multiplexer.
On the other hand, the invention also discloses a coupling assembly system of the multi-channel laser transmitter, which comprises a control device, a manipulator, a test power supply, a coupling light source and optical parameter detection equipment, wherein the control device is respectively connected with the manipulator, the test power supply, the coupling light source and the optical parameter detection equipment, and the coupling assembly system comprises:
the control device is used for controlling the manipulator to install and fix the wavelength division multiplexer and the optical fiber ferrule on the multichannel laser transmitter shell, and the convergent lens is arranged at a preset position between the wavelength division multiplexer and the optical fiber ferrule; controlling a coupling light source to apply coupling light to the optical fiber ferrule, wherein each optical wavelength of the coupling light source is consistent with the optical wavelength emitted by the multi-channel laser; controlling a manipulator to adjust the convergent lens, controlling optical parameter detection equipment to detect optical parameters of each light beam decomposed by the coupling light source through the multi-channel input end of the wavelength division multiplexer, and controlling the manipulator to fix the convergent lens when the optical parameters detected by the optical parameter detection equipment meet preset requirements; controlling a manipulator to install and fix a laser chip set, respectively aligning each laser chip with each input channel of the wavelength division multiplexer, and placing each collimating lens at a preset position between the laser chip set and the wavelength division multiplexer; and controlling a test power supply to electrify the laser chip, controlling an optical parameter detection device to detect the optical power of the optical fiber ferrule light outlet, controlling a manipulator to adjust the collimating lenses according to a detection result fed back by the optical parameter detection device so that the optical power of the optical fiber ferrule light outlet meets a preset value, determining the positions of the collimating lenses, and controlling the manipulator to fix the collimating lenses.
Further, the controlling the test power supply to energize the laser chip, controlling the optical parameter detection device to detect the optical power at the optical fiber ferrule optical outlet, and controlling the manipulator to adjust the collimating lenses according to the detection result fed back by the optical parameter detection device so that the optical power at the optical fiber ferrule optical outlet meets the preset value, determining the positions of the collimating lenses, and controlling the manipulator to fix the collimating lenses specifically includes:
and controlling a test power supply to electrify one laser chip at a time, controlling a manipulator to adjust a collimating lens corresponding to the laser chip, controlling an optical parameter detection device to detect the optical power of an optical fiber insertion core light outlet, controlling the test power supply to stop electrifying the laser chip when the optical power of the optical fiber insertion core light outlet reaches a preset value, and controlling the manipulator to fix the collimating lens.
Further, the controlling the test power supply to energize the laser chip, controlling the optical parameter detection device to detect the optical power of the optical fiber ferrule light outlet, and controlling the manipulator to adjust the collimating lens according to the detection result fed back by the optical parameter detection device so that the optical power of the optical fiber ferrule light outlet meets a preset value, determining the position of each collimating lens, and controlling the manipulator to fix each collimating lens specifically includes:
the method comprises the steps that an optical parameter detection device is arranged on one side of an optical fiber insertion core light outlet by a control manipulator, a test power supply is sequentially controlled to electrify laser chips on two edges of a laser chip set, the control manipulator adjusts collimating lenses corresponding to the electrified laser chips, when the optical power of the optical fiber insertion core light outlet reaches a preset value, the test power supply is controlled to stop electrifying the laser chips, the manipulator is controlled to fix the collimating lenses, and the positions of the collimating lenses on the two edges are recorded;
and controlling the manipulator to adjust the intersection point of a straight line formed by connecting the positions of the collimating lenses between the two edge collimating lenses to the positions of the two edge collimating lenses and the input light path of the wavelength division multiplexer.
Compared with the prior art, the invention has the beneficial effects that: the invention makes full use of the working principle of the wavelength division multiplexer, not only can combine optical signals with various wavelengths together and couple the optical signals to the same optical fiber of an optical line for transmission, but also can separate optical carriers with various wavelengths transmitted by one optical fiber. According to the invention, a coupling light source consistent with the wavelength of light emitted by the multichannel laser is applied from the optical fiber ferrule, the light beam of the coupling light source is reversely decomposed into light beams with a plurality of wavelengths through the convergent lens and the wavelength division multiplexer, the convergent lens can be adjusted according to the optical parameters of each light beam decomposed by the multichannel input end of the wavelength division multiplexer, when the optical parameters meet the preset requirements, the convergent lens can be quickly fixed, the influence of the installation tolerance of the collimating lens in the prior art is avoided, and the coupling assembly efficiency is improved. And because the optical parameters of each path of light beam after the backward coupling light source passes through the optical fiber ferrule, the converging lens and the wavelength division multiplexer are decomposed meet the requirements, the optical fiber ferrule, the converging lens and each path of light beam passing through the wavelength division multiplexer in the forward direction can be well coupled, when the position of the collimating lens group is adjusted, the total power of each path of light beam coupled at the optical fiber ferrule is ensured to meet the preset value only, and the total power of each path of light beam coupled at the optical fiber ferrule is inevitably up to the preset value, thereby avoiding the problem that the straight lens group needs to be additionally aligned to perform power balance in the prior art, simplifying the coupling process and improving the efficiency of coupling assembly.
Drawings
FIG. 1 is a schematic diagram of an optical path of a multi-channel laser transmitter in the prior art;
FIG. 2 is a schematic diagram of an optical path of a multi-channel laser transmitter according to a first embodiment of the present invention;
FIG. 3 is a flow chart of a method for coupling and assembling a multi-channel laser transmitter according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of an optical path of a coupling focusing lens according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an optical path of a coupling collimating lens according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an optical path of another coupling collimating lens according to the second embodiment of the present invention;
fig. 7 is a block diagram of a system for coupling and assembling a multi-channel laser transmitter according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example one
The present embodiment discloses a coupling assembly method for a multi-channel laser transmitter, and the coupling assembly method for a four-channel laser transmitter is taken as an example for detailed description. The light paths of the four-channel laser transmitter are shown in fig. 2, in the coupling assembly method, the optical devices are mounted on a pre-designed shell 30 to be coupled so as to fix the positions of the optical devices, the optical devices are mounted at preset mounting positions on the shell 30, and the preset positions of the optical devices on the shell 30 meet the following characteristics: the optical devices are sequentially arranged along the light emitting direction according to the sequence of the laser chip set 10, the collimating lens set 20, the wavelength division multiplexer 40, the converging lens 70 and the optical fiber ferrule 60; the laser chip 11, the laser chip 12, the laser chip 13 and the laser chip 14 are horizontally arranged, and the laser chips are parallel to each other; the laser chip set 10 light-emitting path, the axis of the collimating lens set 20, the light beam input and output port of the wavelength division multiplexer 40, the axis of the converging lens 70 and the axis of the optical fiber ferrule 60 are positioned on the same plane; the wavelength division multiplexer 40 has an optical path, a converging lens 70 and a fiber stub 60 coaxial.
Referring to fig. 4 and 5, the coupling assembly method of the laser transmitter includes the following steps (as shown in fig. 3):
and S01, installing and fixing the wavelength division multiplexer 40 and the optical fiber ferrule 60 at a preset position of the shell 30, and placing the converging lens 70 at the preset position between the wavelength division multiplexer 40 and the optical fiber ferrule 60.
S02, applying a reverse four-channel coupling light source 80 at the optical fiber ferrule 60, wherein each optical wavelength of the coupling light source 80 is consistent with the optical wavelength emitted by the four-channel laser emitter.
S03, adjusting the position of the converging lens 70, and fixing the converging lens 70 when optical parameters of four paths of light beams decomposed by the coupling light source 80 through the multi-channel input end of the wavelength division multiplexer 40 meet preset requirements;
specifically, as shown in fig. 4, a reverse four-channel coupling light source 80 consistent with the wavelength of the light emitted by the laser transmitter to be generated is applied to the light exit of the optical fiber ferrule 60 along the light exit direction, the light beam of the coupling light source 80 is reversely decomposed into four light beams by the converging lens 70 and the wavelength division multiplexer 40, and the optical parameters of the four decomposed light beams, such as the position of a light spot, the ovality, the gaussian diameter, etc., are detected between the wavelength division multiplexer 40 and the mounting position of the laser chip set 10 by using the optical parameter detecting device 90, and the position of the converging lens 70 is adjusted until the detected optical parameters all meet the preset requirements.
Preferably, the optical parameters further include optical power of the light spot, so that the light path can be better coupled.
Preferably, the optical parameter detecting device 90 is a beam quality analyzer, and can detect the optical power, the position of the light spot, the ellipticity, and the gaussian diameter of the four-way split light beam simultaneously.
In some embodiments, to ensure that the directions of the four split light beams are all parallel to the light emitting direction, the optical parameters detected by the optical parameter detecting device 90 at different positions along the optical path of the four split light beams may all satisfy the preset requirements. Specifically, at least two different points are selected in the light emitting direction of the four paths of decomposed light beams, after the optical parameters of the four paths of light beams detected at the first point meet preset requirements, the optical parameter detection device 90 is translated to the second point along the light path direction to detect whether the optical parameters still meet the preset requirements, if so, the converging lens 70 is fixed, and if not, the position of the converging lens 70 is continuously adjusted until the optical parameters detected by the device 90 in the process of moving the device meet the preset requirements.
After the condensing lens 70 is fixed, the optical parameter detection device 90 is taken out.
S04, installing and fixing the laser chip set 10, aligning the four laser chips with the four input channels of the wavelength division multiplexer respectively, and placing each collimating lens at a preset position between the laser chip set 10 and the wavelength division multiplexer 40;
specifically, the laser chip 11, the laser chip 12, the laser chip 13, and the laser chip 14 are mounted at preset positions of the housing 30, and positions of the laser chips are adjusted to make the four laser chips emit light beams to align with four light inlets of the wavelength division multiplexer, so as to fix the positions of the laser chips. The collimator lens 21, the collimator lens 22, the collimator lens 23, and the collimator lens 24 are then placed between the laser chip set 10 and a preset position of the wavelength division multiplexer 40.
And S05, electrifying the laser chip according to a preset rule, adjusting the collimating lenses to enable the optical power of the light outlet of the optical fiber ferrule 60 to meet a preset value, and determining and fixing the positions of the collimating lenses.
Specifically, as shown in fig. 5, the laser chip 11 is powered on, the optical parameter detection device 90 is used to detect the optical power of the channel at the light exit of the optical fiber ferrule 60, the position of the corresponding collimating lens 21 is adjusted, and when the optical power detected by the optical parameter detection device 90 reaches a preset value, the laser chip 11 is turned off and the collimating lens 21 is fixed.
And then sequentially electrifying the laser chip 12, the laser chip 13 and the laser chip 14, repeating the steps, detecting the optical power of one path of light beam each time, and sequentially adjusting and fixing the positions of the collimating lens 22, the collimating lens 23 and the collimating lens 24.
Preferably, the optical parameter detection device 90 may be an optical power meter so as to accurately measure the optical power.
The embodiment makes full use of the working principle of the wavelength division multiplexer, so that not only can optical signals with various wavelengths be converged and coupled to the same optical fiber of an optical line for transmission, but also optical carriers with various wavelengths transmitted by one optical fiber can be separated. According to the invention, a coupling light source consistent with the wavelength of light emitted by the multichannel laser is applied from the optical fiber ferrule, the light beam of the coupling light source is reversely decomposed into light beams with a plurality of wavelengths through the convergent lens and the wavelength division multiplexer, the convergent lens can be adjusted according to the optical parameters of each light beam decomposed by the multichannel input end of the wavelength division multiplexer, when the optical parameters meet the preset requirements, the convergent lens can be quickly fixed, the influence of the installation tolerance of the collimating lens in the prior art is avoided, and the assembly efficiency of the convergent lens is improved. And because the optical parameters of each path of light beam after the backward coupling light source passes through the optical fiber ferrule, the converging lens and the wavelength division multiplexer are decomposed meet the requirements, and the optical fiber ferrule, the converging lens and each path of light beam passing through the wavelength division multiplexer in the forward direction can be well coupled, when the position of the collimating lens group is adjusted, the total power of each single-channel light beam coupled at the optical fiber ferrule is ensured to meet the preset value, and the total power of each path of light beam coupled at the optical fiber ferrule inevitably reaches the preset value, thereby avoiding the problem that the collimating lens group needs to be additionally aligned to perform power balance in the prior art, simplifying the coupling process and improving the efficiency of coupling assembly.
Example two
In other embodiments, referring to fig. 6, the difference between the method for coupling and assembling a multi-channel laser transmitter and the first embodiment is that, in step S05 of the first embodiment, the laser chip is powered on according to a preset rule, the collimating lenses are adjusted so that the optical power at the light outlet of the optical fiber ferrule 60 meets a preset value, and the determining and fixing of the positions of the collimating lenses may further be:
electrifying a laser chip 11 at one edge of the laser chip group, detecting the optical power of the light beam at the light outlet of the optical fiber ferrule 60 by using optical parameter detection equipment 90, adjusting the position of the corresponding collimating lens 21, closing the laser chip 11 when the output optical power detected by the optical parameter detection equipment 90 meets a preset value, and fixing the collimating lens 21; adjusting and fixing the position of the collimating lens 24 at the other edge of the laser chip set 10 in the above manner;
then adjusting the intersection point of the straight line formed by connecting the positions of the collimating lens 22 and the collimating lens 23 to the two edge collimating lenses and the input light path of the wavelength division multiplexer 40 respectively and fixing the positions.
In the embodiment, the positions of the convergent lenses are determined by detecting the light beams which are emitted from the light outlet of the optical fiber ferrule and decomposed by the wavelength division multiplexer and adjusting the decomposed light beams to be parallel, so that the optical power of the channels at the two edges of the collimating lens group at the light outlet of the optical fiber ferrule can be ensured to accord with the preset value when the positions of the collimating lenses are adjusted, and the positions of other collimating lenses can be determined at the intersection point of the connecting line of the collimating lenses at the two edges and the input light path of the wavelength division multiplexer, thereby saving the step of performing power detection on the collimating lenses between the collimating lenses at the two edges, simplifying the coupling process and improving the efficiency of coupling assembly.
EXAMPLE III
In other embodiments, as shown in fig. 2, compared with the first embodiment, in the multi-channel laser transmitter coupling assembling method, in step S04, one isolator 50 may also be installed at the same time. Specifically, when the laser chip set 10 is mounted and fixed, the isolator 50 is also mounted at a preset position between the wavelength division multiplexer 40 and the converging lens 70, so that the isolator 50 is coaxial with the wave combination output end of the wavelength division multiplexer 40 and the converging lens 70. The isolator 50 only allows the light beam to transmit along the forward optical path, so as to prevent the reflected light from affecting the laser chip, and increase the stability of the laser chip set 10.
Example four
The invention also discloses a coupling assembly system of the multichannel laser transmitter, which is used for executing the coupling assembly method of the multichannel laser transmitter in the first embodiment. As shown in fig. 7, the coupling assembling system of the multi-channel laser transmitter comprises a control device 100, a manipulator 110, a test power supply 120, a coupling light source 80 and an optical parameter detection device 90, wherein the control device 100 is respectively connected with the manipulator 110, the test power supply 120, the coupling light source 80 and the optical parameter detection device 90, and controls the manipulator 110, the test power supply 120, the coupling light source 80 and the optical parameter detection device 90 according to program settings.
Specifically, taking the four-channel laser transmitter in the first embodiment as an example, and referring to fig. 2, the following program is executed by the control device 100:
the control robot 110 mounts and fixes the wavelength division multiplexer 40 and the fiber stub 60 on the multi-channel laser transmitter housing 30, and places the condensing lens 70 at a preset position between the wavelength division multiplexer 40 and the fiber stub 60.
And controlling the coupling light source to apply a coupling light source 80 to the optical fiber ferrule 60, wherein each optical wavelength of the coupling light source 80 is consistent with the optical wavelength emitted by the multi-channel laser.
When the manipulator 110 is controlled to adjust the converging lens 70, the optical parameter detecting device 90 is controlled to detect the optical parameters of each light beam split by the coupling light source 80 through the multi-channel input end of the wavelength division multiplexer 40, and when the optical parameters detected by the optical parameter detecting device 90 meet the preset requirements, the manipulator 110 is controlled to fix the converging lens 70.
Specifically, the manipulator 110 is controlled to place the optical parameter detection device 90 at a position between the wavelength division multiplexer 40 and the preset position of the laser chip, and the manipulator 110 is controlled to adjust the position of the converging lens 70, so that the position of the converging lens 70 is fixed when the optical parameter detection device 90 detects that the optical parameters of the four light beams decomposed by the multi-channel input end of the wavelength division multiplexer 40 all meet the preset requirement.
Preferably, in order to make the optical power output by each channel between the two edge channels better meet the preset value, after the optical parameters detected by the optical parameter detection device 90 meet the preset requirements, the optical parameter detection device 90 is controlled to translate to another position in the light path direction of the four split light beams, and the converging lens 70 is continuously adjusted until the optical parameters detected at the two positions before and after the movement meet the preset requirements.
The optical parameters may include, for example, the position, ellipticity, gaussian diameter, and the like of the light spot, and preferably, the optical power, so that the light path can be better coupled.
Preferably, the optical parameter detecting device 90 is a beam quality analyzer, and can detect the four optical parameters simultaneously.
The control robot 110 mounts and fixes the laser chip set 10 such that each laser chip is aligned with each input channel of the wavelength division multiplexer 40, and the control robot 110 places each collimating lens at a predetermined position between the laser chip set 10 and the wavelength division multiplexer 40.
And controlling the test power supply 120 to electrify the laser chip, controlling the optical parameter detection equipment 90 to detect the optical power of the light outlet of the optical fiber ferrule 60, controlling the mechanical arm 110 to adjust the collimating lenses according to the detection result fed back by the optical parameter detection equipment 90 so that the optical power of the light outlet of the optical fiber ferrule 60 meets the preset value, determining the positions of the collimating lenses, and controlling the mechanical arm 110 to fix the collimating lenses.
Specifically, the test power supply 120 is controlled to energize the laser chip 11, the optical parameter detection device 90 is controlled to detect the optical power of the channel at the light outlet of the optical fiber ferrule 60, the manipulator 110 is controlled to adjust the position corresponding to the collimating lens 21, when the detected optical power reaches a preset value, the test power supply 120 is controlled to stop energizing the laser chip 11, and the manipulator 110 is controlled to fix the collimating lens 21; then, the laser chips 12, 13, 14 are sequentially controlled to be powered on, the above steps are repeated, only the optical parameter detection device 90 is controlled to detect the optical power of one path of light beam each time, and the manipulator 110 is controlled to sequentially adjust and fix the positions of the collimating lenses 22, 23, 24.
The above-described method of adjusting the positions of the collimator lenses is inefficient, and it is preferable that the position of each collimator lens is adjusted by the control device 100 in the following manner:
controlling the test power supply 120 to energize the laser chip 11 on one edge of the laser chip set 10, controlling the optical parameter detection device 90 to detect the optical power of the channel at the light outlet of the optical fiber ferrule 60, controlling the manipulator 110 to adjust the corresponding collimating lens 21, controlling the test power supply 120 to stop energizing the laser chip 11 when the detected optical power detected by the optical parameter detection device 90 reaches a preset value, and controlling the manipulator 110 to fix the collimating lens 21; controlling the manipulator 110 to adjust and fix the position of the collimating lens 24 at the other edge of the laser chip set 10 according to the method;
the control manipulator 110 respectively adjusts the positions of the collimating lenses 22 and 23 to the intersection point of the straight line formed by connecting the positions of the two edge collimating lenses and the input light path of the wavelength division multiplexer 40.
When the position of each collimating lens is adjusted by the coupling assembly system according to the method, the positions of other collimating lenses can be determined at the intersection point of the connecting line of the two collimating lenses and the input optical path of the wavelength division multiplexer only by ensuring that the optical power of the channels at the two edges of the collimating lens group at the optical fiber ferrule light outlet accords with the preset value, so that the step of performing power detection on the collimating lenses between the two edge collimating lenses is saved, the coupling process is simplified, and the coupling assembly efficiency is improved.
Preferably, the optical parameter detection device 90 may be an optical power meter so as to accurately detect the optical power.
The embodiment makes full use of the working principle of the wavelength division multiplexer, so that not only can optical signals with various wavelengths be converged and coupled to the same optical fiber of an optical line for transmission, but also optical carriers with various wavelengths transmitted by one optical fiber can be separated. According to the invention, a coupling light source consistent with the wavelength of light emitted by the multichannel laser is applied from the optical fiber ferrule, the light beam of the coupling light source is reversely decomposed into light beams with a plurality of wavelengths through the convergent lens and the wavelength division multiplexer, the convergent lens can be adjusted according to the optical parameters of each light beam decomposed by the multichannel input end of the wavelength division multiplexer, when the optical parameters meet the preset requirements, the convergent lens can be quickly fixed, the influence of the installation tolerance of the collimating lens in the prior art is avoided, and the coupling assembly efficiency is improved. And because the optical parameters of each path of light beam after the backward coupling light source passes through the optical fiber ferrule, the converging lens and the wavelength division multiplexer are decomposed meet the requirements, and the optical fiber ferrule, the converging lens and each path of light beam passing through the wavelength division multiplexer in the forward direction can be well coupled, when the position of the collimating lens group is adjusted, the total power of each single-channel light beam coupled at the optical fiber ferrule is ensured to meet the preset value, and the total power of each path of light beam coupled at the optical fiber ferrule inevitably reaches the preset value, thereby avoiding the problem that the collimating lens group needs to be additionally aligned to perform power balance in the prior art, simplifying the coupling process and improving the efficiency of coupling assembly.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
Claims (7)
1. A method of coupling assembly of a multi-channel laser transmitter, comprising:
installing and fixing the wavelength division multiplexer and the optical fiber ferrule, and placing the convergent lens at a preset position between the wavelength division multiplexer and the optical fiber ferrule;
applying a coupling light source to the optical fiber inserting core, wherein each optical wavelength of the coupling light source is consistent with the optical wavelength emitted by the multi-channel laser;
arranging optical parameter detection equipment at one side of a multi-channel input end of the wavelength division multiplexer, moving along the optical path direction of each decomposed light beam, and fixing a converging lens if optical parameters detected by the optical parameter detection equipment at different positions meet preset requirements;
installing and fixing a laser chip set, respectively aligning each laser chip with each input channel of the wavelength division multiplexer, and placing each collimating lens at a preset position between the laser chip set and the wavelength division multiplexer;
and electrifying the laser chip according to a preset rule, adjusting the collimating lenses to enable the optical power of the optical fiber inserting core light outlet to meet a preset value, and determining and fixing the positions of the collimating lenses.
2. The coupling assembly method according to claim 1, wherein the energizing the laser chip according to the preset rule, adjusting the collimating lenses so that the optical power of the light outlet of the optical fiber ferrule satisfies the preset value, and determining and fixing the positions of the collimating lenses specifically comprises:
and electrifying one laser chip every time, adjusting a collimating lens corresponding to the laser chip, and closing the laser chip and fixing the collimating lens when the optical power of the optical fiber inserting core light outlet reaches a preset value.
3. The coupling assembling method according to claim 1, wherein the energizing the laser chip according to the preset rule, adjusting the collimating lenses so that the optical power of the optical fiber ferrule light outlet satisfies the preset value, and determining and fixing the positions of the collimating lenses specifically comprises:
respectively electrifying the laser chips at the two edges of the laser chip group, adjusting the collimating lenses corresponding to the electrified laser chips, and when the optical power of the optical fiber ferrule light outlet reaches a preset value, closing the laser chips and fixing the collimating lenses to sequentially obtain the positions of the collimating lenses at the two edges;
and fixing each collimating lens between the two edge collimating lenses at the intersection of a straight line formed by connecting the positions of the two edge collimating lenses and the input light path of the wavelength division multiplexer.
4. The coupling assembly method of claim 1, further comprising: when the laser chip set is installed and fixed, the isolator is also installed at a preset position, so that the isolator is coaxial with the wave combination output end and the converging lens of the wavelength division multiplexer.
5. The coupling assembly system of the multichannel laser transmitter is characterized by comprising a control device, a manipulator, a test power supply, a coupling light source and optical parameter detection equipment, wherein the control device is respectively connected with the manipulator, the test power supply, the coupling light source and the optical parameter detection equipment, and the control device comprises:
the control device is used for controlling the manipulator to install and fix the wavelength division multiplexer and the optical fiber ferrule on the multichannel laser transmitter shell, and the convergent lens is arranged at a preset position between the wavelength division multiplexer and the optical fiber ferrule; controlling a coupling light source to apply coupling light to the optical fiber ferrule, wherein each optical wavelength of the coupling light source is consistent with the optical wavelength emitted by the multi-channel laser; controlling a manipulator to adjust the convergent lens, controlling the optical parameter detection equipment to move along the optical path direction of each decomposed light beam at one side of the multichannel input end of the wavelength division multiplexer, and fixing the convergent lens if optical parameters detected by the optical parameter detection equipment at different positions meet preset requirements; controlling a manipulator to install and fix a laser chip set, respectively aligning each laser chip with each input channel of the wavelength division multiplexer, and placing each collimating lens at a preset position between the laser chip set and the wavelength division multiplexer; and controlling a test power supply to electrify the laser chip, controlling an optical parameter detection device to detect the optical power of the optical fiber ferrule light outlet, controlling a manipulator to adjust the collimating lenses according to a detection result fed back by the optical parameter detection device so that the optical power of the optical fiber ferrule light outlet meets a preset value, determining the positions of the collimating lenses, and controlling the manipulator to fix the collimating lenses.
6. The coupling assembling system according to claim 5, wherein said controlling the test power supply to energize the laser chip, controlling the optical parameter detecting device to detect the optical power of the optical fiber ferrule light outlet, and controlling the manipulator to adjust the collimating lenses according to the detection result fed back by the optical parameter detecting device so that the optical power of the optical fiber ferrule light outlet satisfies a preset value, determining the positions of the collimating lenses, and controlling the manipulator to fix the collimating lenses specifically comprises:
and controlling a test power supply to electrify one laser chip at a time, controlling a manipulator to adjust a collimating lens corresponding to the laser chip, controlling an optical parameter detection device to detect the optical power of an optical fiber insertion core light outlet, controlling the test power supply to stop electrifying the laser chip when the optical power of the optical fiber insertion core light outlet reaches a preset value, and controlling the manipulator to fix the collimating lens.
7. The coupling assembling system according to claim 5, wherein said controlling the test power supply to energize the laser chip, controlling the optical parameter detecting device to detect the optical power of the optical fiber ferrule light outlet, and controlling the manipulator to adjust the collimating lenses according to the detection result fed back by the optical parameter detecting device so that the optical power of the optical fiber ferrule light outlet satisfies a preset value, determining the positions of the collimating lenses, and controlling the manipulator to fix the collimating lenses specifically comprises:
the method comprises the steps that an optical parameter detection device is arranged on one side of an optical fiber inserting core light outlet by a control manipulator, a test power supply is sequentially controlled to electrify laser chips on two edges of a laser chip set, the control manipulator adjusts collimating lenses corresponding to the electrified laser chips, when the optical power of the optical fiber inserting core light outlet reaches a preset value, the test power supply is controlled to stop electrifying the laser chips, the manipulator is controlled to fix the collimating lenses, and the positions of the collimating lenses on the two edges are recorded;
and controlling the manipulator to adjust the intersection point of a straight line formed by connecting the positions of the collimating lenses between the two edge collimating lenses to the positions of the two edge collimating lenses and the input light path of the wavelength division multiplexer.
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| CN114966986A (en) * | 2022-06-07 | 2022-08-30 | 武汉昱升光电股份有限公司 | Method and system for coupling wavelength division multiplexing components |
| CN114994834A (en) * | 2022-07-18 | 2022-09-02 | 武汉乾希科技有限公司 | Light emitting assembly and method for packaging light emitting assembly |
| CN115494593A (en) * | 2022-09-29 | 2022-12-20 | 中国电子科技集团公司第四十四研究所 | Light-weight optical fiber coupling laser |
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| CN110824630A (en) * | 2019-11-19 | 2020-02-21 | 广东瑞谷光网通信股份有限公司 | Coupling assembly method of multichannel laser |
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