CN210427857U - Multichannel optical multiplexer, optical transmitter and optical module - Google Patents
Multichannel optical multiplexer, optical transmitter and optical module Download PDFInfo
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- CN210427857U CN210427857U CN201921686413.4U CN201921686413U CN210427857U CN 210427857 U CN210427857 U CN 210427857U CN 201921686413 U CN201921686413 U CN 201921686413U CN 210427857 U CN210427857 U CN 210427857U
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Abstract
The utility model relates to a multichannel optical multiplexer, optical transmitter and optical module, this multichannel optical multiplexer include first wave filter, second wave filter and first speculum, first speculum is used for launching first light signal and second light signal, first wave filter is used for transmitting the third light signal to reflect the first light signal after being reflected by first speculum, make first light signal and third light signal merge in order to constitute first multichannel light signal, the second wave filter is used for transmitting the fourth light signal, and reflects the second light signal after being reflected by first speculum, makes second light signal and fourth light signal merge in order to constitute second multichannel light signal, and the angle of incidence of the light signal of incidenting to first wave filter, second wave filter and first speculum respectively is 45 +/-0.15. The utility model discloses can improve the angle precision between wave filter and the transmitting mirror to 0.15, consequently can strengthen optical coupling efficiency.
Description
Technical Field
The utility model relates to an optical communication technical field, in particular to multichannel optical multiplexer, optical transmitter and optical module.
Background
In optical communications, a transmitter in an optoelectronic transceiver functions to convert one or more electrical signals to optical signals, and a receiver in the optoelectronic transceiver functions to convert one or more optical signals to electrical signals. At a specified baud rate, the performance of the transmitter or receiver in an optical transceiver is limited by the number of optical channels, and fig. 1 shows a four-channel multiplexer in which the second optical signal 260 and the fourth optical signal 261 are at 5 ° to 40 ° with respect to the first optical signal 270 and the third optical signal 271, respectively, and alignment between filters is difficult, and the accuracy of setting between filters is ± 0.5 degrees, which in turn causes a deviation in the optical signals of the respective channels, causing power variation, and low optical coupling efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can further improve the multichannel multiplexer, optical emitter and the optical module of optical coupling efficiency.
In order to realize the purpose of the utility model, the embodiment of the utility model provides a following technical scheme:
a multi-channel optical multiplexer comprising a first filter, a second filter, and a first mirror for transmitting a first optical signal and a second optical signal; the first filter is used for transmitting the third optical signal and reflecting the first optical signal reflected by the first reflector, so that the first optical signal and the third optical signal are combined to form a first multichannel optical signal; the second filter is used for transmitting a fourth optical signal and reflecting the second optical signal reflected by the first reflector, so that the second optical signal and the fourth optical signal are combined to form a second multi-channel optical signal, and the incident angles of the optical signals respectively incident to the first filter, the second filter and the first reflector are all 45 degrees +/-0.15 degrees;
the multichannel optical multiplexer also comprises a block body, wherein the block body comprises a first opposite side and a second opposite side, one side of the first opposite side is used for supporting the first filter and the second filter, the other side of the first opposite side is used for supporting the first reflector, and two sides of the second opposite side are respectively provided with two through holes which are respectively used for a first multichannel optical signal and a second multichannel optical signal to pass through.
By utilizing the opposite edges of the block to receive the individual optical signals, geometric errors (e.g., in optical signal calibration) are less on all channels in a multi-channel optical signal as compared to conventional optical multiplexers that receive individual optical signals on a single side. The difference between the minimum optical path and the maximum optical path (e.g., skew between the minimum optical path and the longest optical signal path) may be substantially the same as for a corresponding conventional multichannel design.
In a further improved scheme, the multi-channel optical multiplexer further includes a third filter and a second mirror, the second mirror is configured to reflect the first multi-channel optical signal, and the third filter is configured to transmit the second multi-channel optical signal and reflect the first multi-channel optical signal reflected by the second mirror, so that the first multi-channel optical signal and the second multi-channel optical signal are combined to form a third multi-channel optical signal. For a four-channel optical multiplexer, the third multi-channel optical signal is output to the optical transmission medium. One or more optical reflecting surfaces may also be included for aligning the third multi-channel optical signal with the optical transmission medium.
On the other hand, the utility model also provides an optical transmitter, including the first optical signal generator who is used for launching first optical signal, the second optical signal generator who is used for launching the second optical signal, the third optical signal generator who is used for launching the third optical signal, the fourth optical signal generator who is used for launching the fourth optical signal, still include the multiplexer of any embodiment in the embodiment.
In a further optimized scheme, the first optical signal generator and the third optical signal generator are arranged in parallel; the second optical signal generator and the fourth optical signal generator are arranged in parallel.
In another aspect, the present invention also provides an optical module, including an optical signal receiver, and the present invention provides an optical receiver.
Compared with the prior art, the utility model provides a multichannel optical multiplexer and light emitter has utilized transmitting mirror and wave filter simultaneously, and the incident angle of the light signal who incides to wave filter and speculum respectively is 45 +/-0.15, the angle of departure is 45 +/-0.15 also promptly, has promoted reflecting mirror and wave filter from this, the relative degree of accuracy of contained angle between the wave filter, through the test, can promote to +/-0.15 by original +/-0.5 at least, consequently, can reduce the optical power difference that the angular deviation leads to, promote optical coupling efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 structural diagram of a four-channel optical multiplexer in the prior art.
Fig. 2a and fig. 2b are schematic structural diagrams of the four-channel optical multiplexer provided in this embodiment under different viewing angles, respectively.
Fig. 3 is a schematic structural diagram of an optical transmitter using a four-channel optical multiplexer in an embodiment.
Fig. 4 is a schematic structural diagram of an optical transmitter using an eight-channel optical multiplexer in an embodiment.
In the drawings, reference numerals
The block 100, the first mirror 110, the second mirror 111, the first filter 120, the second filter 121, the third filter 122, the through hole 130, the first optical signal generator 140, the second optical signal generator 141, the third optical signal generator 142, the fourth optical signal generator 143, the first optical signal 151, the second optical signal 152, the third optical signal 153, the fourth optical signal 154, the first multichannel optical signal 155, the second multichannel optical signal 156, the third multichannel optical signal 157, the fourth multichannel optical signal 158, the first lens 160, and the second lens 161.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 2a-b, the present embodiment provides a four-channel optical multiplexer, which includes a first filter 120, a second filter 121, and a first mirror 110, wherein the first mirror 110 is configured to emit a first optical signal 151 and a second optical signal 152, the first filter 120 is configured to transmit a third optical signal 153 and reflect the first optical signal 151 reflected by the first mirror 110, so that the first optical signal 151 and the third optical signal 153 are combined to form a first multi-channel optical signal 155, the second filter 121 is configured to transmit a fourth optical signal 154 and reflect the second optical signal 152 reflected by the first mirror 110, so that the second optical signal 152 and the fourth optical signal 154 are combined to form a second multi-channel optical signal 156.
The mirrors and filters typically need to be supported and secured by a frame or structure, and therefore, the four-channel optical multiplexer described above also includes a block 100. As shown in fig. 2a-b, in the present embodiment, the block 100 includes a first pair of sides and a second pair of sides, one side of the first pair of sides is used for supporting the first filter 120 and the second filter 121, the other side of the first pair of sides is used for supporting the first reflector 110, and two sides of the second pair of sides are respectively provided with two through holes 130 for the first optical signal 151, the second optical signal 152, the first multi-channel optical signal 155, and the second multi-channel optical signal 156 to pass through. Specific optical paths can be found in fig. 3.
As shown in fig. 3, a first optical signal 151 emitted from the first optical signal generator 140 passes through a through hole 130 and enters the first reflecting mirror 110, and is reflected by the first reflecting mirror 110 and enters the first filter 120; the second optical signal 152 emitted by the second optical signal generator 141 passes through another through hole 130 on the same side and is incident on the first reflecting mirror 110, and is reflected by the first reflecting mirror 110 and then incident on the second filter 121. The third optical signal 153 emitted by the third optical signal generator 142 is transmitted by the first filter 120, and then combined with the first optical signal 151 reflected by the mirror to form a first multi-channel optical signal 155, and the first multi-channel optical signal 155 passes through a through hole 130 on the opposite side of the block 100; the fourth optical signal 154 emitted from the fourth optical signal generator 143 is transmitted by the second filter 121, and then combined with the second optical signal 152 reflected by the mirror to form a second multi-channel optical signal 156, and the second multi-channel optical signal 156 passes through another through hole 130 on the opposite side of the block 100.
Note that, in the present embodiment, all the incident angles of the optical signals incident on the first filter 120 are 45 ° ± 0.15 ° (± 0.15 ° is a mounting accuracy error), all the incident angles of the optical signals incident on the second filter 121 are 45 ° ± 0.15 °, all the incident angles of the optical signals incident on the first reflecting mirror 110 are 45 ° ± 0.15 °, of course, the incident angle is 45 ° ± 0.15 °, and the exit angle is also 45 ° ± 0.15 °. Because the light enters and exits at an angle of 45 degrees, the filter and the reflector can be respectively obliquely arranged at the opposite sides of the block 100 at an angle of 45 degrees, and as shown in fig. 3, the optical signal generator can be horizontally arranged; the filter and the mirror may be mounted on opposite sides of the block 100 at an angle of 90 deg., as shown in fig. 2, in which case the optical signal generator needs to be tilted.
The four-channel optical multiplexer shown in fig. 2 combines the four optical signals into two optical signals, and generally, needs to combine into one optical signal. Therefore, with continued reference to fig. 3, the four-channel optical multiplexer further includes a third filter 122 and a second mirror 111, the second mirror 111 is used for reflecting the first multi-channel optical signal 155, the third filter 122 is used for transmitting the second multi-channel optical signal 156 and reflecting the first multi-channel optical signal 155 reflected by the second mirror 111, so that the first multi-channel optical signal 155 and the second multi-channel optical signal 156 are combined to form a third multi-channel optical signal 157. It will be readily appreciated that, equivalently, the positions of the second mirror 111 and the third filter 122 may be interchanged, i.e., the second mirror 111 is configured to reflect the second multi-channel optical signal 156, and the third filter 122 is configured to transmit the first multi-channel optical signal 155 and reflect the second multi-channel optical signal 156 after reflection by the second mirror 111, such that the first multi-channel optical signal 155 and the second multi-channel optical signal 156 combine to form the third multi-channel optical signal 157.
Depending on the specific configuration, the third multi-channel optical signal 157 may be directly output to the optical transmission medium, or the third multi-channel optical signal 157 may be aligned with the optical transmission medium via one or more reflecting surfaces. For example, in the configuration shown in fig. 3, two reflecting surfaces are used to reflect the third multi-channel optical signal 157 twice before outputting it to the optical transmission medium.
The four-channel optical multiplexer may further include a lens, for example, as shown in fig. 3, two lenses may also be included. In particular, the first lens 160 is arranged between the first filter 120 and the second mirror 111 for transmitting the first multi-channel light signal 155, i.e. the first multi-channel light signal 155 passes through the first lens 160 before entering the second mirror 111. The second lens 161 is disposed between the second filter 121 and the third filter 122 for transmitting the second multi-channel optical signal 156, i.e., the second multi-channel optical signal 156 passes through the second lens 161 before entering the third filter 122. The collimated optical signals of the lenses are arranged, and similarly, one lens may be disposed between the first to fourth optical signal generators 143 and the first and second filters 121 and the first reflecting mirror 110, respectively.
Fig. 2 and 3 show four-channel optical multiplexers, and similarly, six-channel, eight-channel, or even more-channel optical multiplexers are also possible.
For the six-channel optical multiplexer, a fourth filter is further included for transmitting the sixth optical signal and reflecting the fifth optical signal reflected by the first mirror 110, such that the fifth optical signal and the sixth optical signal are combined to form a fourth multi-channel optical signal 158. At this time, the through hole 130 is added to the block 100, so that the fifth optical signal emitted by the fifth optical signal generator is incident on the first reflecting mirror 110 through the through hole 130, and the fourth multi-channel optical signal 158 is transmitted out of the block 100.
As shown in fig. 4, for the eight-channel optical multiplexer, a fifth filter is further included for transmitting the eighth optical signal and reflecting the seventh optical signal reflected by the first mirror 110, so that the seventh optical signal and the eighth optical signal are combined to constitute a fifth multi-channel optical signal. In this case, the block 100 is also required to be provided with the through hole 130, so as to allow the seventh optical signal emitted by the seventh optical signal generator to pass through the through hole 130 to be incident on the first reflecting mirror 110, and allow the fifth multi-channel optical signal to pass out of the block 100. In addition, for an eight-channel optical multiplexer, two sets of four-channel optical multiplexers may be used.
In addition, for the six-channel optical multiplexer, a third mirror for reflecting the fourth multi-channel optical signal 158 and a sixth filter for transmitting the third multi-channel optical signal 157 and reflecting the fourth multi-channel optical signal 158 reflected by the third mirror may be further included, so that the third multi-channel optical signal 157 and the fourth multi-channel optical signal 158 are combined to constitute a fifth multi-channel optical signal.
Similarly, for an eight-channel optical multiplexer, more mirrors and filters are needed to combine the eight final optical signals into one multi-channel optical signal to be output to an optical transmission medium, as shown in fig. 4.
The multi-channel optical multiplexer provided by the embodiment is used as a component of an optical transmitter, and the optical transmitter further comprises the first to fourth or first to sixth or first to eighth optical signal generators respectively used for emitting the first to fourth or first to sixth or first to eighth optical signals.
The first optical signal generator 140 and the third optical signal generator 142 are disposed in parallel, i.e., the optical axes of the first optical signal 151 and the third optical signal 153 are parallel, and the second optical signal generator 141 and the fourth optical signal generator 143 are disposed in parallel, i.e., the optical axes of the second optical signal 152 and the fourth optical signal 154 are parallel. The first to fourth optical signal generators may be arranged in parallel with each other. For the six-channel optical multiplexer, the first optical signal generator 140, the third optical signal generator 142, and the fifth optical signal generator are disposed in parallel, the second optical signal generator 141, the fourth optical signal generator 143, and the sixth optical signal generator are disposed in parallel, or the first to sixth optical signal generators are disposed in parallel. For the eight-channel optical multiplexer, the first/third/fifth/seventh optical signal generators are arranged in parallel with each other, the second/fourth/sixth/eighth optical signal generators are arranged in parallel with each other, or the first to eighth optical signal generators are arranged in parallel with each other.
The optical transmitter may further include a thermoelectric cooler (TEC) for controlling a temperature of the first to fourth or first to sixth or first to eighth or more optical signal generators, and a housing for enclosing the optical signal generators, the mirror, the filter, and the thermoelectric cooler.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A multi-channel optical multiplexer comprising a first filter, a second filter, and a first mirror for transmitting a first optical signal and a second optical signal; the first filter is used for transmitting the third optical signal and reflecting the first optical signal reflected by the first reflector, so that the first optical signal and the third optical signal are combined to form a first multichannel optical signal; the second filter is used for transmitting a fourth optical signal and reflecting the second optical signal reflected by the first reflector, so that the second optical signal and the fourth optical signal are combined to form a second multi-channel optical signal, and the incident angles of the optical signals respectively incident to the first filter, the second filter and the first reflector are all 45 degrees +/-0.15 degrees;
the multichannel optical multiplexer also comprises a block body, wherein the block body comprises a first opposite side and a second opposite side, one side of the first opposite side is used for supporting the first filter and the second filter, the other side of the first opposite side is used for supporting the first reflector, and two sides of the second opposite side are respectively provided with two through holes which are respectively used for a first optical signal, a second optical signal, a first multichannel optical signal and a second multichannel optical signal to pass through.
2. The multi-channel optical multiplexer of claim 1 further comprising a third filter and a second mirror, the second mirror configured to reflect the first multi-channel optical signal, the third filter configured to transmit the second multi-channel optical signal and reflect the first multi-channel optical signal after reflection by the second mirror such that the first multi-channel optical signal and the second multi-channel optical signal combine to form a third multi-channel optical signal.
3. The multi-channel optical multiplexer of claim 2 further comprising a first lens and a second lens, wherein the first multi-channel optical signal passes through the first lens before entering the second mirror, and wherein the second multi-channel optical signal passes through the second lens before entering the third filter.
4. The multi-channel optical multiplexer of claim 1, further comprising a fourth filter for transmitting the sixth optical signal and reflecting the fifth optical signal after reflection by the first mirror such that the fifth optical signal and the sixth optical signal combine to form a fourth multi-channel optical signal, the optical signal incident on the fourth filter having an angle of incidence of 45 ° ± 0.15 °.
5. The multi-channel optical multiplexer of claim 4, further comprising a fifth filter for transmitting the eighth optical signal and reflecting the seventh optical signal after reflection by the first mirror, such that the seventh optical signal and the eighth optical signal combine to form a fifth multi-channel optical signal, the optical signal incident on the fifth filter having an angle of incidence of 45 ° ± 0.15 °.
6. Optical transmitter comprising a first optical signal generator for transmitting a first optical signal, a second optical signal generator for transmitting a second optical signal, a third optical signal generator for transmitting a third optical signal, a fourth optical signal generator for transmitting a fourth optical signal, characterized in that it further comprises a multiplexer according to any of claims 1-5.
7. The optical transmitter of claim 6, wherein the first optical signal generator and the third optical signal generator are arranged in parallel; the second optical signal generator and the fourth optical signal generator are arranged in parallel.
8. The optical transmitter of claim 6, further comprising a thermoelectric cooler for controlling the temperature of the first through fourth optical signal generators.
9. Optical module comprising an optical signal receiver, characterized in that it further comprises an optical transmitter according to any of claims 6-8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983584A (en) * | 2020-07-17 | 2020-11-24 | 中国工程物理研究院应用电子学研究所 | MEMS galvanometer scanning control system of multi-shot mirror laser radar |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983584A (en) * | 2020-07-17 | 2020-11-24 | 中国工程物理研究院应用电子学研究所 | MEMS galvanometer scanning control system of multi-shot mirror laser radar |
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