CN109936410B - Driver for single-ended driving of MZM modulator, optical emission sub-module, optical transmission module and DWDM system - Google Patents
Driver for single-ended driving of MZM modulator, optical emission sub-module, optical transmission module and DWDM system Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 99
- 230000005540 biological transmission Effects 0.000 title claims description 42
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 239000013307 optical fiber Substances 0.000 claims description 34
- 238000011084 recovery Methods 0.000 claims description 23
- 229910013336 LiNiO3 Inorganic materials 0.000 claims description 3
- 229910006367 Si—P Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of wireless communication, in particular to a driver for single-ended driving of an MZM modulator, which comprises a triode Q1, a resistor R2, a resistor R3, a high-speed capacitor C1, a current source Is, a power supply Vcc1 and a power supply Vcc2, wherein the positive electrode of a first arm optical phase shifter of the MZM modulator Is welded with a first bonding pad, the positive electrode of a second arm optical phase shifter Is welded with a second bonding pad, the first bonding pad Is connected with the power supply Vcc2 through a load R2, and the second bonding pad Is connected with the power supply Vcc2 through a load R3; the radio frequency electric signal to be modulated Is input into the base electrode of the triode Q1, the collector electrode of the triode Q1 Is connected with the second end of the resistor R1 and the first end of the high-speed capacitor C1, the emitter electrode of the triode Q1 Is grounded through the current source Is, and the second end of the capacitor C1 Is connected with the first bonding pad. The invention has the following substantial effects: the load resistor of the MZM modulator is used as a pull-up resistor of the driver, a bias-tee circuit structure is not required to be established, and power consumption can be remarkably reduced.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a driver, an optical emission sub-module, an optical transmission module and a DWDM system for single-ended driving of an MZM modulator.
Background
In order to enrich the increasing data communication demands of people, the throughput of a data center is larger and larger, and the scattered network access units are different in distance, so that the high-speed long-distance optical transmission modules are urgently needed in the industry to ensure that various access units can be covered. However, a high rate brings about a larger data throughput rate, and at the same time, causes an increase in dispersion effect, which further affects the increase in transmission distance. Mach-Zehnder Modulator, i.e., MZM, can achieve higher rates and single-ended MZM can also solve the problem of dispersion limitation, thus being a good research direction for high-speed long-range applications. However, the current MZM modulator driving scheme requires the creation of bias-tee circuits, which is costly and power consuming.
Chinese patent CN107003585A, publication date 2017, month 8, 1, differential TWE MZM driver for silicon photons, comprising differential driver, first and second capacitors and first and second terminals. The differential driver includes a first differential output terminal and a second differential output terminal that collectively form a differential pair. The first differential output is DC coupled to a negative pole of a first arm optical phase shifter of the TWE MZM. The second differential output is DC coupled to a negative pole of a second arm optical phase shifter of the TWE MZM. The first capacitor AC couples the second differential output to the positive pole of the first arm optical phase shifter. The second capacitor AC couples the first differential output to the anode of the second arm optical phase shifter. The first and second terminals are coupled to the negative and positive poles of the first or second arm optical phase shifter, respectively. However, the structure is still quite complex, which is disadvantageous for miniaturization of the element.
Disclosure of Invention
The invention aims to solve the technical problems that: the current MZM modulator has the technical problems of high cost and high power consumption. A lower cost and lower power MZM modulator single-ended drive driver, optical transmit sub-module, optical transmission module and DWDM system are presented that do not use bias-tee circuitry.
In order to solve the technical problems, the invention adopts the following technical scheme: a driver for single-ended driving of an MZM modulator, the driver 51 comprising a triode Q1, a resistor R1, a current source Is and a power supply Vcc1, an optical signal being input from an input port Lin of the MZM modulator and output from an output port Lout of the MZM modulator, a first pad 64 being soldered to an anode of an optical phase shifter of a first arm 62 of the MZM modulator, a second pad 65 being soldered to an anode of an optical phase shifter of a second arm 63 of the MZM modulator, the first pad 64 being connected to a direct current power supply Vcc2 via a resistor R2, the second pad 65 being connected to the power supply Vcc2 via a resistor R3, the second pad 65 being input with a direct current signal; the driver 51 Is coupled to the MZM modulator through a high-speed capacitor C1, a radio frequency electric signal to be modulated Is input to the base of the triode Q1, the collector of the triode Q1 Is connected to the second end of the resistor R1 and the first end of the high-speed capacitor C1, the first end of the resistor R1 Is connected to the power supply Vcc1, the emitter of the triode Q1 Is grounded through a current source Is, and the second end of the capacitor C1 Is connected to the first bonding pad. The upper limit of the output swing can be improved by adjusting the voltage of the power supply Vcc1, and the output swing can be adjusted by adjusting the current of the current source Is.
Preferably, the radio frequency signal to be modulated is input to the input end of the amplifier U1, and the output end of the amplifier U1 is connected with the base electrode of the triode Q1.
Preferably, the MZM modulator is a LiNiO3 MZM modulator, an InP MZM modulator, or a Si-P MZM modulator.
An optical emission sub-module based on an MZM modulator uses a driver for single-end driving of the MZM modulator, and comprises a tunable laser 41, an optical isolator 42, a wavelength locker 45 and an optical fiber 44, wherein an optical signal emitted by the tunable laser 41 is connected with an input port Lin of the MZM modulator 43 through the optical isolator 42, the wavelength locker 45 is connected with the tunable laser 41, an output port Lout of the MZM modulator 43 is connected with the optical fiber 44, and the MZM modulator 43 is driven by the driver 51.
An optical transmission module uses an optical emission sub-module based on an MZM modulator as described above, and comprises a transmitting clock recovery module 31, an MCU35, a receiving clock recovery module 36 and a receiving optical component 37, where the transmitting clock recovery module 31 and the receiving clock recovery module 36 are both connected with the MCU35, an electric signal of the transmitting end is input to the input end of the transmitting clock recovery module 31, the output end of the transmitting clock recovery module 31 is connected with the input end of a driver 51 of the optical emission sub-module 33, the output end of the driver 51 is connected with the input end of the optical emission sub-module 33, the output end of the optical emission sub-module 33 is connected with a transmitting optical fiber 34, the receiving optical fiber 38 is connected with the input end of the receiving optical component 37, and the output end of the receiving optical component 37 is connected with the input end of the receiving clock recovery module 36.
Preferably, the receiving optical component 37 is a receiving module formed by a PIN diode or an avalanche diode.
The DWDM system for wireless front transmission is constructed by an optical transmission module as described above, and comprises a plurality of AAU end optical transmission modules 21, a plurality of DU end optical transmission modules 22, a plurality of circulators, a first combining and branching device 23, a second combining and branching device 24 and a single mode optical fiber 27, wherein the AAU end optical transmission modules 21 and the DU end optical transmission modules 22 are paired one by one, the same channel is used, the transmitting optical fibers 34 and the receiving optical fibers 38 of the plurality of AAU end optical transmission modules 21 are connected with the first combining and branching device 23 through the circulators, the transmitting optical fibers 34 and the receiving optical fibers 38 of the plurality of DU end optical transmission modules 22 are connected with the second combining and branching device 24 through the circulators, the first combining and branching device 23 and the second combining and branching device 24 are connected through the single mode optical fiber 27, the AAU end optical transmission modules 21 are connected with a terminal AAU, and the DU end optical transmission modules 22 are connected with the DU units of the local side.
The invention has the following substantial effects: the load resistor of the MZM modulator is used as a pull-up resistor of the driver, a bias-tee circuit structure is not required to be established, the power consumption can be obviously reduced, the cost is reduced, and the large-scale popularization and use are facilitated.
Drawings
Fig. 1 is a schematic diagram of a driver circuit according to an embodiment.
Fig. 2 is a schematic diagram of a light emitting sub-module according to an embodiment.
Fig. 3 is a schematic structural diagram of an optical transmission module according to an embodiment.
Figure 4 is a schematic diagram of a DWDM system architecture according to an embodiment.
Wherein: 21. the optical fiber module comprises an AAU end optical transmission module, 22, a DU end optical transmission module, 23, a first multiplexer/demultiplexer, 24, a second multiplexer/demultiplexer, 25, a circulator, 27, a single-mode optical fiber, 31, a transmitting end clock recovery module, 33, an optical transmitting sub-module, 34, a transmitting optical fiber, 35, an MCU,36, a receiving end clock recovery module, 37, a receiving end optical component, 38, a receiving optical fiber, 41, a tunable laser, 42, an optical isolator, 43, an MZM modulator, 44, an optical fiber, 45, a wavelength locker, 51, a driver, 62, an MZM modulator first arm, 63, an MZM modulator second arm, 64, a first bonding pad, 65 and a second bonding pad.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Embodiment one:
A driver for single-ended driving of MZM modulator can be LiNiO3 MZM modulator, inP MZM modulator or Si-P MZM modulator. As shown in fig. 1, in this embodiment, the driver 51 includes a triode Q1, a resistor R1, a current source Is and a power supply Vcc1, an optical signal Is input from an input port Lin of the MZM modulator, and Is output from an output port Lout of the MZM modulator, a first pad 64 Is welded to the positive electrode of the optical phase shifter of the first arm 62 of the MZM modulator, a second pad 65 Is welded to the positive electrode of the optical phase shifter of the second arm 63 of the MZM modulator, the first pad 64 Is connected to a direct current power supply Vcc2 through a resistor R2, the second pad 65 Is connected to the power supply Vcc2 through a resistor R3, and a direct current signal Is input to the second pad 65; the driver 51 Is coupled to the MZM modulator through a high-speed capacitor C1, the radio frequency electric signal to be modulated Is input to the base of the triode Q1, the collector of the triode Q1 Is connected to the second end of the resistor R1 and the first end of the high-speed capacitor C1, the first end of the resistor R1 Is connected to the power supply Vcc1, the emitter of the triode Q1 Is grounded through a current source Is, and the second end of the capacitor C1 Is connected to the first bonding pad. The upper limit of the output swing can be improved by adjusting the voltage of the power supply Vcc1, and the output swing can be adjusted by adjusting the current of the current source Is. The input end of the amplifier U1 inputs the radio frequency electric signal to be modulated, and the output end of the amplifier U1 is connected with the base electrode of the triode Q1.
An optical emission sub-module based on an MZM modulator uses a driver for single-ended driving of the MZM modulator as described above, and as shown in fig. 2, the optical emission sub-module includes a tunable laser 41, an optical isolator 42, a wavelength locker 45 and an optical fiber 44, an optical signal emitted from the tunable laser 41 is connected to an input port Lin of the MZM modulator 43 through the optical isolator 42, the wavelength locker 45 is connected to the tunable laser 41, an output port Lout of the MZM modulator 43 is connected to the optical fiber 44, and the MZM modulator 43 is driven by a driver 51.
An optical transmission module uses an optical emission sub-module based on an MZM modulator as described above, as shown in fig. 3, and includes an originating clock recovery module 31, an MCU35, a receiving clock recovery module 36, and a receiving optical component 37, where the originating clock recovery module 31 and the receiving clock recovery module 36 are connected to the MCU35, an electrical signal of an emitting end is input to an input end of the originating clock recovery module 31, an output end of the originating clock recovery module 31 is connected to an input end of a driver 51 of the optical emission sub-module 33, an output end of the driver 51 is connected to an input end of the optical emission sub-module 33, an output end of the optical emission sub-module 33 is connected to the transmitting optical fiber 34, a receiving optical fiber 38 is connected to an input end of the receiving optical component 37, and an output end of the receiving optical component 37 is connected to an input end of the receiving clock recovery module 36. The receiving optical component 37 is a receiving module formed by a PIN diode or an avalanche diode.
As shown in fig. 4, the DWDM system for wireless forwarding is constructed by an optical transmission module as described above, and includes a plurality of AAU-end optical transmission modules 21, a plurality of DU-end optical transmission modules 22, a plurality of circulators, a first combiner/demultiplexer 23, a second combiner/demultiplexer 24, and a single-mode optical fiber 27, where the AAU-end optical transmission modules 21 and the DU-end optical transmission modules 22 are paired one by one, and the transmitting optical fibers 34 and the receiving optical fibers 38 of the plurality of AAU-end optical transmission modules 21 are connected to the first combiner/demultiplexer 23 through the circulators, the transmitting optical fibers 34 and the receiving optical fibers 38 of the plurality of DU-end optical transmission modules 22 are connected to the second combiner/demultiplexer 24 through the circulators, the first combiner/demultiplexer 23 is connected to the second combiner/demultiplexer 24 through the single-mode optical fiber 27, the AAU-end optical transmission modules 21 are connected to the terminal AAU, and the DU-end optical transmission modules 22 are connected to the DU units of the DU-end.
The above-described embodiment is only a preferred embodiment of the present invention, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (7)
1. A driver for single-ended driving of an MZM modulator, characterized in that,
The driver (51) comprises a triode Q1, a resistor R1, a current source Is and a power supply Vcc1, an optical signal Is input by an input port Lin of the MZM modulator and Is output from an output port Lout of the MZM modulator, a first bonding pad (64) Is welded at the positive electrode of a first arm (62) optical phase shifter of the MZM modulator, a second bonding pad (65) Is welded at the positive electrode of a second arm (63) optical phase shifter of the MZM modulator, the first bonding pad (64) Is connected with a direct current power supply Vcc2 through a resistor R2, the second bonding pad (65) Is connected with the power supply Vcc2 through a resistor R3, and a direct current signal Is input into the second bonding pad (65);
The driver (51) Is coupled with the MZM modulator through a high-speed capacitor C1, a radio frequency electric signal to be modulated Is input into the base electrode of the triode Q1, the collector electrode of the triode Q1 Is connected with the second end of the resistor R1 and the first end of the high-speed capacitor C1, the first end of the resistor R1 Is connected with the power supply Vcc1, the emitter electrode of the triode Q1 Is grounded through a current source Is, and the second end of the capacitor C1 Is connected with the first bonding pad.
2. A driver for single ended driving of an MZM modulator according to claim 1,
The radio frequency signal to be modulated is input to the input end of the amplifier U1, and the output end of the amplifier U1 is connected with the base electrode of the triode Q1.
3. A driver for single ended driving of an MZM modulator according to claim 1 or 2, wherein,
The MZM modulator is a LiNiO3 MZM modulator, an InP MZM modulator or a Si-P MZM modulator.
4. An optical transmitter sub-module based on an MZM modulator using a driver for single-ended driving of an MZM modulator according to any one of claims 1 to 3,
The optical signal emitted by the tunable laser (41) is connected with an input port Lin of an MZM modulator (43) through the optical isolator (42), the wavelength locker (45) is connected with the tunable laser (41), an output port Lout of the MZM modulator (43) is connected with the optical fiber (44), and the MZM modulator (43) is driven by a driver (51).
5. An optical transmission module using an MZM modulator-based optical transmit sub-module according to claim 4,
The device comprises a transmitting end clock recovery module (31), an MCU (35), a receiving end clock recovery module (36) and a receiving end optical component (37), wherein the transmitting end clock recovery module (31) and the receiving end clock recovery module (36) are connected with the MCU (35), transmitting end electric signals are input into the input end of the transmitting end clock recovery module (31), the output end of the transmitting end clock recovery module (31) is connected with the input end of a driver (51) of an optical transmitting sub-module (33), the output end of the driver (51) is connected with the input end of the optical transmitting sub-module (33), the output end of the optical transmitting sub-module (33) is connected with a transmitting optical fiber (34), the receiving optical fiber (38) is connected with the input end of the receiving end optical component (37), and the output end of the receiving end optical component (37) is connected with the input end of the receiving end clock recovery module (36).
6. An optical transmission module as claimed in claim 5, wherein,
The receiving optical component (37) is a receiving module formed by PIN diodes or avalanche diodes.
7. A DWDM system for wireless forwarding, constructed from an optical transmission module as claimed in claim 5 or 6,
The optical transmission device comprises a plurality of AAU end optical transmission modules (21), a plurality of DU end optical transmission modules (22), a plurality of circulators (25), a first combining and splitting device (23), a second combining and splitting device (24) and single-mode optical fibers (27), wherein the AAU end optical transmission modules (21) and the DU end optical transmission modules (22) are paired one by one, the same channel is used, transmitting optical fibers (34) and receiving optical fibers (38) of the plurality of AAU end optical transmission modules (21) are connected with the first combining and splitting device (23) through the circulators (25), transmitting optical fibers (34) and receiving optical fibers (38) of the plurality of DU end optical transmission modules (22) are connected with the second combining and splitting device (24) through the circulators (25), the first combining and splitting device (23) are connected with the second combining and splitting device (24) through the single-mode optical fibers (27), the AAU end optical transmission modules (21) are connected with a terminal AAU, and the DU end optical transmission modules (22) are connected with DU units of a local side.
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| CN209562560U (en) * | 2019-04-04 | 2019-10-29 | 杭州芯耘光电科技有限公司 | It is a kind of for the driver of MZM modulator single-ended drive, light emitting secondary module, light delivery module and dwdm system |
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| FR2810176B1 (en) * | 2000-06-09 | 2002-10-11 | Cit Alcatel | DEVICE FOR REGENERATING OPTICAL SIGNALS |
| US9874800B2 (en) * | 2014-08-28 | 2018-01-23 | Inphi Corporation | MZM linear driver for silicon photonics device characterized as two-channel wavelength combiner and locker |
| WO2016049233A1 (en) * | 2014-09-23 | 2016-03-31 | Finisar Corporation | Differential twe mzm driver for silicon photonics |
| CN106646932B (en) * | 2016-12-29 | 2023-05-23 | 中国电子科技集团公司第三十四研究所 | DC bias working point control loop of Mach-Zehnder intensity modulator |
| CN109546987B (en) * | 2018-11-16 | 2021-09-03 | 西安电子科技大学 | Broadband active phase shifter |
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