CN114415295A - Light emitting device, optical module and method for improving optical power - Google Patents
Light emitting device, optical module and method for improving optical power Download PDFInfo
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- CN114415295A CN114415295A CN202210050752.3A CN202210050752A CN114415295A CN 114415295 A CN114415295 A CN 114415295A CN 202210050752 A CN202210050752 A CN 202210050752A CN 114415295 A CN114415295 A CN 114415295A
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- Prior art keywords
- optical
- light
- light beam
- power
- emitting device
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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
- G02B6/4213—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being polarisation selective optical 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
- G02B6/4204—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
- G02B6/4215—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
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/564—Power control
Abstract
The invention discloses a light emitting device, an optical module and a method for improving optical power, belonging to the technical field of optical communication. In the invention, the original optical signal is divided into two beams, one beam of optical signal is amplified and then is combined with the other beam of optical signal, so that the power of the finally output optical signal is greatly improved compared with the original signal, and the application requirement of high-speed and long-distance transmission is met.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an optical transmitting device, an optical module and a method for improving optical power.
Background
The main components of an optical module product are optical devices, which are broadly classified into a transmitting device and a receiving device, and as the requirements on transmission rate and transmission distance are increased, the requirements on the optical power of the transmitting optical device are more severe, and the power of a laser in the market at present cannot meet the application requirements, so that how to increase the transmitting power of the laser is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a light emitting device, an optical module and a method for improving optical power, so as to improve the power of the optical device and meet application requirements.
In one aspect, the invention provides a light emitting device, which includes a laser, a beam splitter, an optical amplifier, and a polarization beam combiner, wherein an optical signal emitted by the laser is split into a first beam and a second beam by the beam splitter, polarization states of the first beam and the second beam are perpendicular to each other, the first beam is incident to the polarization beam combiner, the second beam is incident to the polarization beam combiner after being amplified by the optical amplifier, and the polarization beam combiner combines the first beam and the amplified second beam into a beam of light to be output.
In a more preferable embodiment, the optical attenuator is further included, and the second light beam enters the optical amplifier after passing through the optical attenuator. In the scheme, the optical attenuator is arranged, and the optical attenuator is used for properly attenuating the second light beam so as to ensure that the optical amplifier does not reach a saturation state, and the optical power can be adjusted to meet various application requirements.
In a more preferred embodiment, the optical amplifier further comprises a power monitoring unit for monitoring the power of the second light beam and adjusting the amplified optical power of the optical amplifier according to the monitoring result. In the scheme, the optical power is monitored, the optical attenuator is adjusted according to the monitoring result, or the amplification gain of the optical amplifier is adjusted, so that the adjustment precision can be improved, and the adjustment efficiency can be improved.
In another aspect, the present invention further provides an optical module, which includes a receiving optical device and a transmitting optical device according to any embodiment of the present invention.
In another aspect, the present invention further provides a method for increasing optical power, including the following steps:
dividing an optical signal output by a laser into two beams, namely a first beam and a second beam;
amplifying the second light beam by using an optical amplifier to obtain an amplified second light beam;
and combining the first light beam and the amplified second light beam, and outputting the combined light beam.
In a more preferable embodiment, before the step of amplifying the second light beam by using the optical amplifier, the method further includes the steps of: and monitoring the optical power of the second light beam, comparing the monitored optical power with the required optical power, and adjusting the amount of the second light beam incident to the optical amplifier according to the comparison result.
Compared with the prior art, the invention divides the original optical signal into two beams, amplifies one beam of optical signal and combines the amplified beam of optical signal with the other beam of optical signal, so that the power of the finally output optical signal is greatly improved compared with the original signal, and the application requirements of high-speed and long-distance transmission are met. The optical power is monitored, the efficiency of power adjustment can be improved, and the method is suitable for more application occasions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic block diagram of an emitting light device in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Referring to fig. 1, the light emitting device provided in this embodiment includes a laser, a first collimating lens, an optical isolator, an optical splitter, a polarization beam combiner, a second coupling lens, an optical attenuator, a first coupling lens, an optical amplifier, a second collimating lens, and a band pass filter.
The laser emits laser, the laser is coupled into parallel light through the first collimating lens, the parallel light passes through the optical isolator and is divided into two beams of light by the optical splitter, and the polarization states of the two beams of light are mutually perpendicular. For convenience of description, the two beams of light will be referred to herein as P-light and S-light, respectively. One beam of light (such as P light) is transmitted along an original optical path, the other beam of light (S light) is firstly coupled to a semiconductor light generator through an optical attenuator and then a first coupling lens, is amplified by an optical amplifier, is converted into parallel light through a second collimating lens, is filtered through a band-pass filter, is finally combined into a beam of light through a polarization beam combiner and is finally coupled into an optical fiber through a second coupling lens.
In the scheme of the embodiment, the optical signal is divided into a part to be amplified, and then the amplified light is combined with the other part of light, so that the power of the finally output optical signal is greater than that of the original optical signal, and the purpose of increasing the power is further achieved, so that the application requirements of high-speed and long-distance transmission are met.
The optical amplifier is preferably a semiconductor optical amplifier, but may be of other types. The optical amplifier has a saturation power and does not amplify any more when the saturation power is reached, so that it is necessary to amplify the split S light, rather than amplifying the full optical power emitted by the laser. Generally speaking, the P light transmitted along the original optical path split by the optical splitter occupies most of the P light, the S light occupies only a very small part (basically less than 10%) of the total optical power, and the power of the S light after passing through the optical amplifier can reach the level of several times of the P light, so that the optical power coupled to the optical fiber after passing through the polarization beam combiner is also improved by several times compared with the original laser. According to the performance and power requirement of the laser, the purpose of optical power adjustment can be achieved by adjusting the proportion of the optical signal to be amplified to the original optical signal.
Theoretically, by adjusting the proportion of the split S light, it is possible to avoid power saturation caused by excessive optical power input to the optical amplifier, but different application occasions have different requirements for the total optical power, so in order to ensure that the optical power of the optical amplifier is not saturated, and it is convenient to adjust the optical power as required, the optical attenuator is provided in this embodiment. When the optical power input to the optical amplifier is too high to cause the power saturation of the optical amplifier, the optical attenuator is adjusted to reduce the size of incident light; on the contrary, when the power input to the optical amplifier is too small, the optical attenuator is adjusted to increase the input optical power so as to meet the power requirement.
It is understood that the arrangement of the first collimating lens, the optical isolator, the first coupling lens, the optical amplifier, and the second coupling lens is an optional component for improving the quality of the optical signal, and in other embodiments, the components may be selectively used or not used, or a part of the components may be selectively used.
As another more preferable embodiment, the above-mentioned optical emitting device may further include a power monitoring unit for monitoring the power input to the optical amplifier and adjusting the optical power to a suitable range when the total power does not meet the requirement.
More specifically, the power monitoring unit comprises an optical detector and a controller, the optical detector detects the optical power of the S light in real time, the controller calculates the optical power of the S light after amplification according to the amplification factor of the optical amplifier and the current performance of the optical attenuator, then calculates the total power with the optical power of the P light, and if the total power does not meet the requirement, the performance parameter of the optical attenuator and/or the amplification gain of the optical amplifier are/is adjusted so that the total power meets the application requirement.
By means of the light emitting device of the structure shown in fig. 1, a method for increasing the optical power can be summarized, comprising the following steps:
step 1, dividing an optical signal output by a laser into two beams, namely a first beam and a second beam.
And 2, amplifying the second light beam by using the optical amplifier to obtain an amplified second light beam.
When step 2 is executed, the optical power of the second light beam may be monitored in real time, the monitored optical power is compared with the required optical power, and according to the comparison result, the amount of the second light beam incident to the optical amplifier is adjusted by using the optical attenuator, and/or the amplification gain of the optical amplifier is adjusted, so that the total power of all or part of the optical signals of the second light beam after being amplified by the optical amplifier and combined with the first light beam meets the application requirement.
And 3, combining the first light beam and the amplified second light beam into a light beam and outputting the light beam.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The light emitting device comprises a laser, and is characterized by further comprising a beam splitter, an optical amplifier and a polarization beam combiner, wherein an optical signal emitted by the laser is split into a first light beam and a second light beam through the beam splitter, the polarization states of the first light beam and the second light beam are perpendicular to each other, the first light beam enters the polarization beam combiner, the second light beam enters the polarization beam combiner after being amplified by the optical amplifier, and the polarization beam combiner combines the first light beam and the amplified second light beam into a light beam to be output.
2. The light emitting device of claim 1, further comprising an optical attenuator, wherein the second light beam enters the optical amplifier after passing through the optical attenuator.
3. The light emitting device according to claim 1 or 2, further comprising a power monitoring unit for monitoring the power of the second light beam and adjusting the power of the light amplified by the optical amplifier according to the monitoring result.
4. The light emitting device according to claim 3, further comprising a first coupling lens, wherein light output from the optical attenuator is input to the optical amplifier after passing through the first coupling lens.
5. The light emitting device of claim 3, further comprising a second collimating lens, wherein the amplified second light beam passes through the second collimating lens and then is input to the polarization beam combiner.
6. The light emitting device of claim 5, further comprising a band pass filter, wherein light output from the second collimating lens passes through the band pass filter and then is input to the polarization beam combiner.
7. The light emitting device according to claim 1, further comprising a second coupling lens, wherein the optical signal output by the polarization beam combiner is coupled and output by the second coupler.
8. A light module comprising a receiving light device, characterized in that it further comprises a light emitting device according to any of claims 1-7.
9. A method of increasing optical power, comprising the steps of:
dividing an optical signal output by a laser into two beams, namely a first beam and a second beam;
amplifying the second light beam by using an optical amplifier to obtain an amplified second light beam;
and combining the first light beam and the amplified second light beam, and outputting the combined light beam.
10. The method of claim 9, wherein before the step of amplifying the second light beam with the optical amplifier, the method further comprises the steps of:
and monitoring the optical power of the second light beam, comparing the monitored optical power with the required optical power, and adjusting the amount of the second light beam incident on the optical amplifier and/or the amplification gain of the optical amplifier according to the comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210050752.3A CN114415295A (en) | 2022-01-17 | 2022-01-17 | Light emitting device, optical module and method for improving optical power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210050752.3A CN114415295A (en) | 2022-01-17 | 2022-01-17 | Light emitting device, optical module and method for improving optical power |
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| Publication Number | Publication Date |
|---|---|
| CN114415295A true CN114415295A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210050752.3A Pending CN114415295A (en) | 2022-01-17 | 2022-01-17 | Light emitting device, optical module and method for improving optical power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021822A (en) * | 2022-05-12 | 2022-09-06 | 昂纳信息技术（深圳）有限公司 | Optical transmission system |
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2022
- 2022-01-17 CN CN202210050752.3A patent/CN114415295A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021822A (en) * | 2022-05-12 | 2022-09-06 | 昂纳信息技术（深圳）有限公司 | Optical transmission system |
| CN115021822B (en) * | 2022-05-12 | 2023-09-12 | 昂纳科技(深圳)集团股份有限公司 | Optical transmission system |
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