CN110995354B - Optical assembly and optical module - Google Patents
Optical assembly and optical module Download PDFInfo
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- CN110995354B CN110995354B CN201911321607.9A CN201911321607A CN110995354B CN 110995354 B CN110995354 B CN 110995354B CN 201911321607 A CN201911321607 A CN 201911321607A CN 110995354 B CN110995354 B CN 110995354B
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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
- H04B10/40—Transceivers
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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
- H04B10/516—Details of coding or modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
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Abstract
An embodiment of the present application provides an optical module, which includes: an electrical interface unit configured to output a pair of differential electrical signals; the electrical switching unit is provided with a signal input end and a plurality of single-ended electrical signal output ends, the signal input end is used for receiving at least one path of differential electrical signals in the pair of differential electrical signals, and the plurality of single-ended electrical signal output ends output a plurality of paths of single-ended electrical signals; an optical assembly including a plurality of lasers and the plurality of lasers being a plurality of lasers having a mutual wavelength interval; wherein the plurality of lasers generate a plurality of optical signals from the plurality of single-ended electrical signals. The embodiment of the application realizes the increase of the number of the channels with the adjustable wavelength by increasing the number of the lasers with the initial wavelength and the mutual interval, has low material cost, does not need to adopt a special production process, is easy to realize and has high production and manufacturing yield.
Description
Technical Field
The application relates to the field of optical communication, in particular to an optical assembly and an optical module.
Background
In optical fiber communication, a wavelength tunable optical module has been a subject of extensive study. The wavelength tunable optical module can not only make full use of bandwidth resources of optical fibers of a DWDM system and greatly improve the communication capacity of a network system, but also be more flexible and changeable in links such as networking, material preparation and the like compared with the DWDM optical module with fixed wavelength, and can also be used as a backup light source of the traditional DWDM system, thereby being a key factor of an intelligent optical network.
Although there are many methods for realizing tunable wavelength, very complicated optical design and manufacturing process, ultra-high precision control, etc. are usually required, which is not favorable for mass commercial optical modules.
Disclosure of Invention
An object of the embodiment of the present application is to provide an optical component and an optical module, in the embodiment of the present application, the number of channels with adjustable wavelength is increased by increasing the number of lasers and driving chips, the material cost is low, a special production process is not required, the implementation is easy, and the production yield is high.
In a first aspect, an embodiment of the present application provides an optical module, where the optical module includes: an electrical interface unit configured to output a pair of differential electrical signals; the electrical switching unit is provided with a signal input end and a plurality of single-ended electrical signal output ends, the signal input end is used for receiving at least one path of differential electrical signals in the pair of differential electrical signals, and the plurality of single-ended electrical signal output ends output a plurality of paths of single-ended electrical signals; and an optical assembly including a plurality of lasers and the plurality of lasers being a plurality of lasers having a mutual wavelength interval; wherein the plurality of lasers generate a plurality of optical signals from the plurality of single-ended electrical signals.
The tuning of the wavelengths of the channels is realized by increasing a plurality of lasers with certain intervals at the initial wavelength and increasing the number of driving signals through the electric switching unit, so that the material cost is low and the production process is simple.
In some embodiments, the optical assembly further comprises a plurality of laser drivers configured to drive the lasers according to the single-ended electrical signal.
The high-speed signal modulation driving from electricity to light is realized by a laser driver matched with a plurality of lasers with certain intervals of initial wavelengths.
In some embodiments, the electrical switching unit is a single pole double throw switch.
Through the single-pole double-throw switch, one path of differential signal is converted into two paths of single-ended signals, so that two laser drivers can be driven, finally, two lasers with certain intervals of initial wavelengths emit light, and the number of wavelength-adjustable channels is increased.
In some embodiments, the optical module further includes a first clock data recovery unit, a second clock data recovery unit, and a third clock data recovery unit; the plurality of lasers includes a first laser, a second laser, and a third laser; the plurality of laser drivers include a first laser driver, a second laser driver, and a third laser driver; one path of differential signal in the pair of differential electrical signals is input into the single-pole double-throw switch, and the single-pole double-throw switch respectively outputs a first single-ended signal and a second single-ended signal; the input end of the first clock data recovery unit is used for receiving the first single-ended signal, the output end of the first clock data recovery unit is connected with the input end of the driving signal of the first laser driver, and the output end of the first laser driving unit is connected with the first laser; the input end of the second clock data recovery unit is used for receiving the second single-ended signal, the output end of the second clock data recovery unit is connected with the driving signal input end of the second laser driver, and the output end of the second laser driver is connected with the second laser; the input end of the third clock data recovery unit is used for receiving the other path of differential electric signal in the pair of differential electric signals, the output end of the third clock data recovery unit is connected to the signal input end of the third laser driver, and the output end of the third laser driver is connected with the third laser.
The single channel number can be modulated to three wavelengths by a single-pole double-throw switch, three clock data recovery circuits and three laser drivers which are matched with three lasers with certain intervals of initial wavelengths.
In some embodiments, the electrical switching unit is a multi-channel analog switch.
The number of channels can be further expanded by using high speed analog switches.
In some embodiments, the electrical interface unit is configured to output a pair of differential electrical signals; the input end of the analog switch is used for receiving the pair of differential electric signals, the output end of the analog switch is used for outputting 2X single-end electric signals, the number of the channels of the analog switch is X, X is a natural number larger than 1, and the output 2X single-end electric signals drive 2X lasers through 2X channels.
By using 1: the analog switch of the X channel can expand the number of signal channels to a number 2X times.
In some embodiments, each of the 2X channels includes a clock data recovery unit and a laser driver; the input end of the clock data recovery unit is used for receiving the single-ended electric signal; and the input end of the laser driver is used for receiving the signal output by the clock data recovery unit, and the output end of the laser driver outputs a driving signal so as to drive the laser to emit light.
By providing the clock data recovery unit and the laser driver in the channel, the number of the channels can be increased from 1: the analog switch of the X channel is matched with a laser driver which finally drives 2X initial wavelengths to emit light at certain intervals, and the number of the channels is increased to 2X.
In some embodiments, the input of the laser driver is for receiving a single-ended type electrical signal or a differential type electrical signal. The increase of the number of channels is realized by setting the connection mode of signals at the input end of the laser driver.
In some embodiments, the laser driver has a pair of differential signal inputs, respectively a first differential signal input and a second differential signal input; the first differential signal input end is connected with the output end of the clock data recovery unit, and the second differential signal input end is subjected to impedance termination matching processing.
The input differential signal is divided into two paths of single-ended signals to be input into the signal input end of the laser driver, and the other signal input end of the laser driver is subjected to impedance matching processing, so that the number of the signals can be doubled.
In some embodiments, the laser driver and the laser are connected by a flexible board or a gold wire.
In a second aspect, embodiments of the present application further provide an optical assembly, where the optical assembly includes a plurality of lasers, and the plurality of lasers are a plurality of lasers having an initial wavelength interval.
The number of the channels with adjustable wavelength is increased by increasing the number of the lasers with certain intervals at the initial wavelength, the material cost is low, a special production process is not needed, the realization is easy, and the production and manufacturing yield is high.
In some embodiments, the light assembly further comprises a plurality of light detectors.
The optical module can be integrated by arranging the optical detector in the optical assembly.
In a third aspect, embodiments of the present application provide a light assembly, including: a plurality of lasers, the plurality of lasers being a plurality of lasers having an initial wavelength interval; one single port of the differential signal input ends of the laser drivers is used for receiving an input single-ended electric signal, and the other single port of the differential signal input ends is subjected to impedance matching termination processing; wherein the laser driver is configured to connect with the laser to drive the laser to emit light.
The number of lasers with certain intervals at the initial wavelength is increased, the number of laser drivers is correspondingly increased, the number of channels with adjustable wavelengths is increased by setting a connection mode of signals at the input end of the laser drivers, the material cost is low, a special production process is not needed, the realization is easy, and the production and manufacturing yield is high.
In a fourth aspect, an embodiment of the present application further provides an optical line terminal device, where the optical line terminal device includes a system board card and the optical module in the first aspect or the optical modules in the second and third aspects, and the system board card is provided with a plurality of slots, and the optical module is connected to the matched slots in a pluggable manner through an electrical interface.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a block diagram illustrating a first optical module according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of a second optical module according to an embodiment of the present disclosure;
fig. 3 is a block diagram illustrating a structure of an optical module including a single-pole double-throw switch according to an embodiment of the present disclosure;
fig. 4 is a block diagram illustrating a structure of an optical module including a high-speed analog switch light according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of an optical assembly according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another optical assembly provided in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
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 application, 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.
Fig. 1 is an optical module 10 according to an embodiment of the present application, where the optical module 10 includes: an electrical interface unit 100, an electrical switching unit 200 and an optical component 300.
The electrical interface unit 100 may be configured to output a pair of differentials (e.g., the differential signal Tx + and the differential signal Tx-shown in fig. 1).
The electrical switching unit 200 has a signal input terminal IN1 and a plurality of single-ended electrical signal output terminals (e.g., OUT1, OUT2 … … OUT (N-1) shown IN fig. 1), the signal input terminal IN1 is configured to receive at least one differential electrical signal of the pair of differential electrical signals (the input terminal shown IN fig. 1 is configured to be a differential signal Tx +), and the plurality of single-ended electrical signal output terminals (e.g., OUT1, OUT2 … … OUT (N-1) shown IN fig. 1) output a plurality of single-ended electrical signals (e.g., 1 st single-ended electrical signal, 2 nd single-ended electrical signal … … (N-1) th single-ended electrical signal shown IN fig. 1).
In some embodiments, the optical module 10 further includes an optical signal processing unit 400, which is configured to process the multiple optical signals output by the multiple lasers (i.e., the 1 st optical signal, the 2 nd optical signal … … N shown in fig. 1) and generate an output optical signal. For example, the optical signal processing unit may include an isolator, a collimating lens, or the like.
It should be noted that the electrical switching unit 200 in fig. 1 receives one path of differential signals, i.e., Tx +, but the embodiment of the present application does not limit the number of differential signals received by the electrical switching unit 200. For example, in some embodiments, the electrical interface unit 100 may output a plurality of pairs of differential signals, where each pair of differential electrical signals includes two differential signals, and the respective electrical switching unit 200 may receive one or more of the plurality of pairs of differential electrical signals. In some embodiments, both differential signals of a pair of differential electrical signals may be coupled into the electrical switching unit 200.
The embodiment of the application realizes the tuning of the wavelengths of a plurality of channels by increasing a plurality of lasers with certain intervals at the initial wavelength and increasing the number of driving signals through the electric switching unit, and has the advantages of low material cost and simple production process. The embodiment of the application provides a simple and low-cost optical module with a tunable wavelength.
For example, assuming that a laser can tune the wavelength of n channels through temperature, the above embodiments of the present application can tune the wavelength of n × m channels by using m lasers spaced from each other by the wavelength. Meanwhile, the laser driver and the CDR (clock data recovery chip) with the number of m channels are matched with the optical fiber, so that the high-speed signal modulation driving from electricity to light is realized. Referring to fig. 1, assuming that each of the N lasers can adjust the wavelength of N channels through temperature, the N lasers with mutual initial wavelength intervals (for example, the initial wavelength of the first laser is λ 1, the initial wavelength of the second laser is λ 2, … …, and the initial wavelength of the nth laser is λ 1N) output multipath optical signals as follows: the 1 st optical signal comprises λ 11, λ 12 and λ 13 … … λ N, and the 2 nd optical signal comprises λ 21, λ 22, λ 23 … … λ 2N, … …, λ N1, λ N2 and λ N3 … … λ Nn. Therefore, the material cost of the embodiment of the application is low, and the production process is simple.
Fig. 2 is a block diagram of another structure of the optical module 10 according to an embodiment of the present disclosure, and a difference between the optical module of fig. 2 and the optical module 10 shown in fig. 1 is that the optical assembly 300 in the optical module shown in fig. 2 further includes a plurality of laser drivers. For the sake of brief description and highlighting the differences between fig. 1 and fig. 2, fig. 2 does not show the electrical interface unit 100 and the electrical switching unit 200 included in the optical module of fig. 1.
The optical module 10 included with reference to fig. 2 optical module 10 may further include a plurality of laser drivers (e.g., the first laser driver, the second laser driver … … nth laser driver illustrated in fig. 2), the plurality of laser drivers (e.g., the first laser driver, the second laser driver … … nth laser driver illustrated in fig. 2) configured to drive one of the first laser driver, the second laser driver … …, and the (N-1) th laser according to a single-ended electrical signal (e.g., the 1 st single-ended electrical signal, the 2 nd unit electrical signal … …, (N-1) th single-ended electrical signal illustrated in fig. 2).
It should be noted that the multiple single-ended electrical signals (i.e., the 1 st single-ended electrical signal, the 2 nd single-ended electrical signal … …, the (N-1) th single-ended electrical signal) shown in fig. 2 are the multiple single-ended electrical signals output by the electrical switching unit 200 shown in fig. 1.
The high-speed signal modulation driving from electricity to light is realized by a laser driver matched with a plurality of lasers with certain intervals of initial wavelengths.
In some embodiments the electrical switching unit 200 is a single pole double throw switch, as shown in fig. 3.
Through the single-pole double-throw switch, one path of differential signal is converted into two paths of single-ended signals, so that two laser drivers can be driven, finally, two lasers with certain intervals of initial wavelengths emit light, and the number of wavelength-adjustable channels is increased.
Referring to fig. 3, which is a block diagram of an optical module formed by a single-pole double-throw switch 200 receiving a differential electrical signal, the single-pole double-throw switch 200 has a signal input terminal IN1, and two single-ended signal output terminals OUT1 and OUT 2.
The optical module 10 of fig. 3 further includes a first clock data recovery unit, a second clock data recovery unit, a third clock data recovery unit, a first laser, a second laser, a third laser, a first laser driver, a second laser driver, and a third laser driver; the single-pole double-throw switch is provided with two single-end electric signal output ends; wherein, one differential signal (the differential signal Tx + in fig. 3) of a pair of differential electrical signals (e.g., the differential signal Tx + and the differential signal Tx-) in fig. 3 is input into the single-pole double-throw switch 200 (i.e., the single-pole double-throw switch in fig. 3), and the single-pole double-throw switch 200 outputs a first single-ended signal and a second single-ended signal, respectively; the input end of the first clock data recovery unit is used for receiving the first single-ended signal, the output end of the first clock data recovery unit is connected with the driving signal input end of the first laser driver, and the output end of the first laser driving unit is connected with the first laser; the input end of the second clock data recovery unit is used for receiving a second single-ended signal, the output end of the second clock data recovery unit is connected with the driving signal input end of the second laser driver, and the output end of the second laser driver is connected with the second laser; the input end of the third clock data recovery unit is configured to receive the other differential electrical signal (for example, the differential signal Tx — in fig. 3) of the pair of differential electrical signals, the output end of the third clock data recovery unit is connected to the signal input end of the third laser driver, and the output end of the third laser driver is connected to the third laser.
It should be noted that each of the first laser driver, the second laser driver, and the third laser driver shown in fig. 3 has a pair of differential signal input terminals (not shown in the drawings, and refer to fig. 4 below), which are the first differential signal input terminal and the second differential signal input terminal, respectively; the first differential signal input end is connected with the output end of the clock data recovery unit, and the second differential signal input end is subjected to impedance termination matching processing. The input differential signal is divided into two paths of single-ended signals to be input into the signal input end of the laser driver, and the other signal input end of the laser driver is subjected to impedance matching processing, so that the number of the signals can be doubled.
The embodiment of the application can modulate the single channel quantity into three wavelengths through three lasers with initial wavelength intervals, a single-pole double-throw switch, three clock data recovery circuits and three laser drivers.
As shown in fig. 4, the electrical switching unit 200 shown in fig. 1 may be a multi-channel analog switch, that is, a 1: X high-speed analog switch shown in fig. 4, wherein the number of channels of the analog switch 200 is X, and X is a natural number greater than 1. The analog switch has a first signal input terminal IN1 and a second signal input terminal IN2, and has 2X single-ended signal output terminals Tx1+, Tx1-, … … TxX + and TxX-.
The number of channels can be further expanded by using high speed analog switches.
The electrical interface unit 100 of the optical module 10 shown in fig. 4 is configured to output a pair of differential electrical signals (i.e., the differential signal Tx + and the differential signal Tx-), of fig. 4; the first signal input terminal IN1 and the second signal input terminal IN2 of the analog switch 200 are configured to receive a pair of differential electrical signals (i.e., the differential signal Tx + and the differential signal Tx- "of fig. 4), and all the output terminals (i.e., the output terminals Tx1+, Tx1-, … … output terminals TxX + and TxX-) of the analog switch 200 are configured to output 2X single-ended electrical signals (i.e., the 1 st single-ended electrical signal, the 2 nd single-ended electrical signal … …, and the 2 nd X single-ended electrical signal shown IN fig. 4); wherein the output 2X single-ended electrical signals drive 2X lasers through 2X channels (i.e., channel 1, channel 2, etc., shown in fig. 4).
The embodiment of the application adopts the following steps that 1: the high-speed analog switch of the X channel can expand the number of signal channels to 2X times.
It should be noted that, in the embodiment of the present invention, channel 1 or channel 2, etc. are respectively connected to a laser driver to drive the laser to emit light.
As shown in fig. 4, each of the 2X channels (i.e., channel 1, channel 2, etc. shown in fig. 4) includes a clock data recovery unit 302 and a laser driver 303; the input end of the clock data recovery unit 302 is used for receiving the single-ended electrical signal; and an input terminal of the laser driver 303 is configured to receive the signal output by the clock data recovery unit 302, and an output terminal of the laser driver 302 outputs a driving signal to drive the laser (i.e., one of the lasers 1 and 2 … …, and 2X shown in fig. 4) to emit light. It should be noted that fig. 4 does not show the connection relationship between the clock data recovery unit 302 and the laser driver 303, nor does it show the connection relationship between the 2X single-end electrical signals, i.e., the 1 st single-end electrical signal, the 2 nd single-end electrical signal … … and the 2X single-end electrical signal, and the clock recovery unit and the laser driving unit, which please refer to the above description.
The laser 1 outputs a first optical signal, the laser 2 outputs a 2 nd optical signal … …, the laser 2X outputs a 2 nd optical signal, and then the 2X optical signal is processed by the signal processing unit 400 and outputs an output optical signal.
In some embodiments, the optical signal processing unit 400 may include an isolator, or a collimating lens, or the like.
By providing the clock data recovery unit and the laser driver in the channel, the number of the channels can be increased from 1: the analog switch of the X channel is matched with a laser driver which finally drives 2X initial wavelengths to emit light at certain intervals, and the number of the channels is increased to 2X.
In some embodiments, the input of the laser driver is for receiving a single-ended type electrical signal or a differential type electrical signal. The increase of the number of channels is realized by setting the connection mode of signals at the input end of the laser driver.
The clock data recovery unit 302 in channel 1 is connected to a laser driver 303 (not shown in the figure), the laser driver 303 having a pair of differential signal input terminals, respectively a first differential signal input terminal (not shown in fig. 4) and a second differential signal input terminal (not shown in fig. 4); the first differential signal input end is connected to the output end of the clock data recovery unit 302, and the second differential signal input end performs impedance termination matching processing. It should be noted that, for explaining the technical features briefly, the first differential Tx1+ signal shown in fig. 4 is first input to the clock data recovery unit 302 and then connected to the first differential signal input terminal of the laser driver 303, and the Tx 1-shown in fig. 4 is connected to the second differential signal input terminal of the laser driver 303 for performing impedance termination.
The input differential signal is divided into two paths of single-ended signals to be input into the signal input end of the laser driver, and the other signal input end of the laser driver is subjected to impedance matching processing, so that the number of the signals can be doubled.
Assuming that each of the 2X lasers in fig. 4 can adjust the wavelength of n channels according to the temperature, the multipath optical signals output by the 2X lasers with the mutual initial wavelength interval (for example, the initial wavelength of the first laser is λ 1, the initial wavelength of the second laser is λ 2, … …, and the initial wavelength of the 2X laser is λ 2X) are respectively: the optical signal system comprises 1 st optical signal with the wavelengths of lambda 11, lambda 12 and lambda 13 … … lambda n, 2 nd optical signal with the wavelengths of lambda 21, lambda 22 and lambda 23 … … lambda 2n, … … and 2 nd optical signal with the wavelengths of lambda 2X1, lambda 2X2 and lambda 2X3 … … lambda 2 Xn. In some embodiments, the laser driver 303 and the laser (i.e., laser 1, laser 2, etc. of fig. 4) are connected by a flexible board or by a gold wire.
As shown in fig. 5, a light assembly 300 is provided.
The light assembly 300 of fig. 5 includes: a plurality of lasers such as the first laser, the second laser … … nth laser, and N laser drivers such as the first laser driver, the second laser driver … … nth laser driver.
The first laser, the second laser … … and the Nth laser are multiple lasers with initial wavelength intervals; one single port of differential signal input ends of one or more of the first laser driver, the second laser driver … …, the nth laser driver is used for receiving an input single-ended electrical signal, and the other single port of the differential signal input ends is subjected to impedance matching termination processing; wherein the laser driver is configured to connect with the laser to drive the laser to emit light.
In some embodiments, the optical assembly 300 may further include an automatic temperature control circuit 310, the automatic temperature control circuit 310 being configured to adjust a die temperature of the laser. The temperature of the laser core and the output wavelength of the laser have a definite relation, so that the aim of stabilizing the optical wavelength is fulfilled.
In some embodiments, the optical assembly 300 may further include a laser auto-power control circuit (not shown) for stabilizing the laser output optical power.
The tuning of the wavelengths of a plurality of channels is realized by adding a plurality of lasers with certain intervals at the initial wavelength, the material cost is low, and the production process is simple.
As shown in fig. 6, the optical assembly 300 includes a plurality of lasers, such as a first laser, a second laser … … nth laser, and the plurality of lasers of the first laser, the second laser … … nth laser are a plurality of lasers with wavelength intervals.
In some embodiments, the optical assembly 300 of fig. 6 or 5 further includes a plurality of photodetectors.
In some embodiments, the optical assembly 300 of fig. 6 may further include an automatic temperature control circuit 310, the automatic temperature control circuit 310 being used to adjust the die temperature of the laser. The temperature of the laser core and the output wavelength of the laser have a definite relation, so that the aim of stabilizing the optical wavelength is fulfilled.
In some embodiments, the optical assembly 300 of fig. 6 may further include a laser auto-power control circuit (not shown) for stabilizing the laser output optical power.
The tuning of the wavelengths of a plurality of channels is realized by adding a plurality of lasers with certain intervals at the initial wavelength, the material cost is low, and the production process is simple.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. 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.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (9)
1. A light module, characterized in that the light module comprises:
an electrical interface unit configured to output a pair of differential electrical signals;
the electrical switching unit is provided with a signal input end and a plurality of single-ended electrical signal output ends, the signal input end is used for receiving at least one path of differential electrical signals in the pair of differential electrical signals, and the plurality of single-ended electrical signal output ends output a plurality of paths of single-ended electrical signals;
an optical assembly including a plurality of lasers and the plurality of lasers being a plurality of lasers having a mutual wavelength interval;
the plurality of lasers generate a plurality of paths of optical signals according to the plurality of paths of single-ended electrical signals;
the electric switching unit is a multi-channel analog switch;
the electrical interface unit is configured to output a pair of differential electrical signals;
the input end of the analog switch is used for receiving the pair of differential electric signals, the output end of the analog switch is used for outputting 2X single-end electric signals, the number of the channels of the analog switch is X, X is a natural number larger than 1, and the output 2X single-end electric signals drive 2X lasers through 2X channels.
2. The optical module of claim 1, wherein the optical assembly further comprises a plurality of laser drivers configured to drive the lasers according to the single-ended electrical signal.
3. The optical module of claim 2, wherein the electrical switching unit is a single pole double throw switch.
4. The optical module of claim 3, further comprising a first clock data recovery unit, a second clock data recovery unit, and a third clock data recovery unit;
the plurality of lasers includes a first laser, a second laser, and a third laser;
the plurality of laser drivers include a first laser driver, a second laser driver, and a third laser driver;
wherein the content of the first and second substances,
one path of differential signal in the pair of differential electrical signals is input into the single-pole double-throw switch, and the single-pole double-throw switch respectively outputs a first single-ended signal and a second single-ended signal; the input end of the first clock data recovery unit is used for receiving the first single-ended signal, the output end of the first clock data recovery unit is connected with the input end of the driving signal of the first laser driver, and the output end of the first laser driving unit is connected with the first laser; the input end of the second clock data recovery unit is used for receiving the second single-ended signal, the output end of the second clock data recovery unit is connected with the driving signal input end of the second laser driver, and the output end of the second laser driver is connected with the second laser;
the input end of the third clock data recovery unit is used for receiving the other path of differential electric signal in the pair of differential electric signals, the output end of the third clock data recovery unit is connected to the signal input end of the third laser driver, and the output end of the third laser driver is connected with the third laser.
5. The optical module of claim 1, wherein each of the 2X channels includes a clock data recovery unit and a laser driver;
the input end of the clock data recovery unit is used for receiving the single-ended electric signal; and
the input end of the laser driver is used for receiving the signal output by the clock data recovery unit, and the output end of the laser driver outputs a driving signal to drive the laser to emit light.
6. An optical module as claimed in claim 2, wherein the input of the laser driver is for receiving a single-ended type electrical signal or a differential type electrical signal.
7. An optical module as claimed in claim 4 or 5, wherein the laser driver has a pair of differential signal inputs, a first differential signal input and a second differential signal input respectively;
the first differential signal input end is connected with the output end of the clock data recovery unit, and the second differential signal input end is subjected to impedance termination matching processing.
8. An optical module as claimed in claim 4 or 5, characterized in that the laser driver is connected to the laser by means of a flexible board or by means of gold wires.
9. A light assembly, comprising:
a plurality of lasers, the plurality of lasers being a plurality of lasers having an initial wavelength interval; and
one single port of the differential signal input ends of the laser drivers is used for receiving an input single-ended electric signal, and the other single port of the differential signal input ends is subjected to impedance matching termination processing;
wherein the laser driver is configured to connect with the laser to drive the laser to emit light.
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