CN216526413U - Light emitting device and optical module - Google Patents
Light emitting device and optical module Download PDFInfo
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- CN216526413U CN216526413U CN202220121344.8U CN202220121344U CN216526413U CN 216526413 U CN216526413 U CN 216526413U CN 202220121344 U CN202220121344 U CN 202220121344U CN 216526413 U CN216526413 U CN 216526413U
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Abstract
The utility model discloses a transmitting optical device and an optical module, belonging to the technical field of optical communication, wherein the transmitting optical device comprises a laser, a beam splitter, an optical amplifier and a polarization beam combiner, an optical signal emitted by the laser is split into a first light beam and a second light beam by the beam splitter, the polarization states of the first light beam and the second light beam are mutually vertical, the first light beam is incident to the polarization beam combiner, the second light beam is incident to 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. In the utility model, 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 utility model relates to the technical field of optical communication, in particular to a light emitting device and an optical module.
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.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an optical emitting device and an optical module, so as to improve the power of the optical device and meet the application requirements.
In one aspect, the utility model 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 preferred 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 one embodiment, the power monitoring unit includes a light detector and a controller, the light detector is connected to the controller, and the controller is connected to the optical amplifier and the optical attenuator.
In a further optimized scheme, the optical attenuator further comprises a first coupling lens, and light output by the optical attenuator passes through the first coupling lens and then is input to the optical amplifier.
In a further optimized scheme, the polarization beam combiner further comprises a second collimating lens, and the amplified second light beam passes through the second collimating lens and then is input to the polarization beam combiner.
In a further optimized scheme, the polarization beam combiner further comprises a band-pass filter, and light output by the second collimating lens passes through the band-pass filter and then is input into the polarization beam combiner.
In a further optimized scheme, the polarization beam combiner further includes a second coupling lens, and the optical signal output by the polarization beam combiner is output after being coupled by the second coupling lens.
In a further optimized scheme, the optical isolator is further included, and an optical signal emitted by the laser is input into the optical isolator, passes through the optical isolator and then is input into the optical splitter.
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.
Compared with the prior art, the utility model 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, a semiconductor 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) passes through an optical attenuator, is coupled to a semiconductor light generator through a first coupling lens, is amplified by a semiconductor optical amplifier, is converted into parallel light through a second collimating lens, is filtered through a band-pass filter, is combined into a beam of light by a polarization beam combiner, and is 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.
Semiconductor optical amplifiers have a saturation power and do not amplify any more when the saturation power is reached, so 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 passing through the semiconductor 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 semiconductor 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 semiconductor 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 semiconductor 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 semiconductor 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 easy to understand that the arrangement of the first collimating lens, the optical isolator, the first coupling lens, the semiconductor 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.
In this embodiment, a semiconductor optical amplifier is used for optical signal amplification, but other types of optical amplifiers are also optional.
As another more optimized implementation, the above-mentioned light emitting device may further include a power monitoring unit, which is used to monitor the power input to the semiconductor optical amplifier, and adjust 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 semiconductor 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.
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 of claim 3, wherein the power monitoring unit comprises a light detector and a controller, the light detector is connected to the controller, and the controller is connected to the optical amplifier and the optical attenuator.
5. 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.
6. 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.
7. The light emitting device of claim 6, 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.
8. 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 through the second coupling lens.
9. The light emitting device of claim 1, further comprising an optical isolator, wherein the optical signal from the laser is input to the optical isolator, and then to the beam splitter after passing through the optical isolator.
10. A light module comprising a receiving light device, characterized in that it further comprises a light emitting device according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220121344.8U CN216526413U (en) | 2022-01-17 | 2022-01-17 | Light emitting device and optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220121344.8U CN216526413U (en) | 2022-01-17 | 2022-01-17 | Light emitting device and optical module |
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| Publication Number | Publication Date |
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| CN216526413U true CN216526413U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220121344.8U Active CN216526413U (en) | 2022-01-17 | 2022-01-17 | Light emitting device and optical module |
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| CN (1) | CN216526413U (en) |
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