WO2011085552A1 - 兼容实现pdm-bpsk和qpsk调制的方法及装置 - Google Patents
兼容实现pdm-bpsk和qpsk调制的方法及装置 Download PDFInfo
- Publication number
- WO2011085552A1 WO2011085552A1 PCT/CN2010/070193 CN2010070193W WO2011085552A1 WO 2011085552 A1 WO2011085552 A1 WO 2011085552A1 CN 2010070193 W CN2010070193 W CN 2010070193W WO 2011085552 A1 WO2011085552 A1 WO 2011085552A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical signal
- polarization state
- phase
- bpsk
- pdm
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 58
- 230000003287 optical effect Effects 0.000 claims abstract description 629
- 230000010287 polarization Effects 0.000 claims abstract description 293
- 230000010363 phase shift Effects 0.000 claims abstract description 49
- 238000010168 coupling process Methods 0.000 claims description 17
- 230000005693 optoelectronics Effects 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 15
- 229910052710 silicon Inorganic materials 0.000 description 15
- 239000010703 silicon Substances 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5053—Laser transmitters using external modulation using a parallel, i.e. shunt, combination of modulators
-
- 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
- H04B10/5161—Combination of different modulation schemes
-
- 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
- H04B10/532—Polarisation modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2096—Arrangements for directly or externally modulating an optical carrier
Definitions
- the present invention relates to the field of optical modulation technologies, and in particular, to a method and apparatus compatible with PDM-BPSK and QPSK modulation. Background technique
- the single-wave capacity of the fiber-optic backbone DWDM (Dense Wavelength Division Multiplexing System) network has been upgraded from 1 OGb/s to 40Gb/s.
- the single-wave rate of 100G has become the next point of interest for operators.
- the key technology to achieve this technology upgrade is a variety of advanced modulation techniques, such as: P-BPSK (Poly izat ion Divi s ion Mul t iplexing Binary Phase Shift Keying) modulation technology And QPSK (Quadature Phase Shift Keying) modulation technology.
- Embodiments of the present invention provide a method and apparatus compatible with PDM-BPSK and QPSK modulation, which are compatible with PDM-BPSK and QPSK modulation modes, and save design cost.
- a method compatible with implementing PDM-BPSK and QPSK modulation including:
- the first optical signal and the second optical signal subjected to the polarization state control and the phase shift are combined to maintain a polarization state, and a PDM-BPSK modulated optical signal or a QPSK modulated optical signal is output.
- a device compatible with PDM-BPSK and QPSK modulation including:
- a splitting module configured to divide the direct current into the first light and the second light of the same power;
- the first modulation module is configured to perform photoelectric modulation on the first light, and output a first optical signal in a BPSK format;
- a second modulation module configured to perform photoelectric modulation on the second path light, and output a second optical signal in a BPSK format
- a polarization state control module configured to perform polarization state control on the first optical signal, wherein polarization states of the first optical signal and the second optical signal controlled by polarization state are vertically orthogonal or consistent; phase shift a module, configured to perform phase shifting on the first optical signal or the second optical signal, and the phase difference between the first optical signal and the second optical signal that is phase-shifted is ⁇ /2 or remains unchanged;
- the combining module is configured to combine the first optical signal and the second optical signal subjected to the polarization state control and the phase shift into an optical signal that maintains a polarization state, and output a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- the method and device for implementing PDM-BPSK and QPSK modulation are provided by the embodiment of the present invention, and the first optical signal or the second optical signal is phase-shifted by performing polarization state control on the first optical signal, and is subjected to polarization state control. And combining the phase-shifted first optical signal and the second optical signal to maintain a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and the first optical signal and the first optical signal may be combined
- the phase difference between the two optical signals outputs a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- the invention can be compatible with implementing two modulation modes of PDM-BPSK and QPSK, thereby saving design cost and increasing modulation flexibility.
- DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.
- Embodiment 1 is a flowchart of a method according to Embodiment 1 of the present invention.
- Embodiment 3 is a flowchart of a method according to Embodiment 3 of the present invention.
- Embodiment 4 is a flowchart of a method according to Embodiment 4 of the present invention.
- FIG. 5 is a flowchart of a method according to Embodiment 5 of the present invention.
- FIG. 6 is a flowchart of a method according to Embodiment 6 of the present invention.
- Embodiment 7 is a flowchart of a method according to Embodiment 7 of the present invention.
- Embodiment 8 is a schematic structural diagram of an apparatus according to Embodiment 8 of the present invention.
- Embodiment 9 is a schematic structural diagram of a device according to Embodiment 9 of the present invention.
- FIG. 9a is a schematic diagram of outputting a QPSK modulated optical signal by using the apparatus provided in Embodiment 9 of the present invention
- FIG. 9b is a schematic diagram of outputting a PDM-BPSK modulated optical signal by using the apparatus provided in Embodiment 9 of the present invention
- FIG. 10 is a schematic structural diagram of a device according to Embodiment 10 of the present invention.
- FIG. 1 is a schematic structural diagram of a device according to Embodiment 11 of the present invention. detailed description
- Embodiment 1 An embodiment of the present invention provides a method for implementing PDM-BPSK and QPSK modulation. As shown in FIG. 1, the method includes:
- Step 102 Perform photoelectric modulation on the first path light and the second path light respectively, and correspondingly output a first optical signal and a second optical signal in a BPSK (Binary Pha s e Shift Keying) format;
- BPSK Binary Pha s e Shift Keying
- the method for implementing PDM-BPSK and QPSK modulation performs phase shift on the first optical signal or the second optical signal by performing polarization state control on the first optical signal, and performs polarization state control and phase
- the shifted first optical signal and the second optical signal are combined to perform optical signals in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and the first optical signal and the second light may be
- the phase difference between the signals outputs a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- the invention can be compatible with the implementation of PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- a 40 Gb/s QPSK optical signal and a 40 Gb/s PDM-BPSK optical signal are generated by compatible modulation.
- the light propagation method can utilize the method of spatial optical coupling or the method of using the TU L- ghtwave C i rcui t s (planar optical waveguide).
- the compatible method for implementing PDM-BPSK and QPSK modulation includes:
- the direct current light is divided into a first path light and a second path light with the same power, and the first path light and the first path light Both lights have a first polarization state.
- the direct current light may be output by an LD (Laser Diode), but is not limited thereto.
- LD Laser Diode
- the direct current light can be split by a PS (Power Splitter).
- PS Power Splitter
- the input light is specularly reflected and transmitted into two bundles of output light;
- the silicon-based PLC method it is realized by a silicon-based Y-type optical waveguide.
- the silicon-based Y-type optical waveguide it is not limited to the manner described above.
- photoelectric modulation can be performed in the following manner:
- the first path light is injected into the first MZM (MachZender Modulator), the DC offset of the first MZM is set to the lowest point of the transmission curve, and the two 20 Gb/s electrical signals are separately driven in a differential manner.
- the second path light is injected into the second MZM (MachZender Modulator), the DC offset of the second MZM is set to the lowest point of the transmission curve, and the two 20 Gb/s electrical signals are separately driven in a differential manner.
- the manner of the photoelectric modulation is not limited thereto, and may be performed in other manners.
- the first optical signal after the polarization state control is divided into two cases:
- Case 1 The first optical signal after the polarization state control has a first polarization state
- Case 2 The first optical signal after the polarization state control has a second polarization state.
- the polarization state control can be performed in the following manner:
- the polarization state is controlled by setting the operating state of the OPC (Opica ica Polarization Control).
- OPC Opapica ica Polarization Control
- a half-wave plate is inserted into the spatial light path, and by rotating the axial position of the half-wave plate, when the axial direction of the half-wave plate is the same as the polarization state of the light, the output polarization state is the same as the input polarization state.
- the output polarization state and the input polarization state are perpendicular to each other; when using the silicon-based PLC method, the electronic control based on lithium niobate is integrated on the silicon substrate.
- the cascade wave plate controls the output polarization state by applying an appropriate power source to the wave plate.
- the manner of controlling the polarization state is not limited thereto, and may be performed in other manners.
- the optical carrier phase of the first optical signal may be an arbitrary value, that is, the phase shift of the first optical signal may not be performed. That is, the phase difference between the phase-shifted second optical signal and the first optical signal remains unchanged.
- phase shift can be performed in the following manner:
- the carrier phase of the optical signal is changed by adjusting the OPS (Optical Phase Shifter).
- OPS Optical Phase Shifter
- the carrier phase of the optical signal is changed by fine-tuning the optical path of the spatial optical path;
- the silicon-based PLC method is used, the refractive index of the material of the optical waveguide is changed by heating the silicon-based optical waveguide, thereby changing the optical signal.
- Carrier phase is adjusted by adjusting the OPS (Optical Phase Shifter).
- phase shift is not limited to this, and may be performed in other manners.
- the combination of the optical signals in the polarization state means that the two optical signals can be combined regardless of the polarization state of the two optical signals, and the two optical signals can be stably transmitted during the combination of the optical signals.
- the road light signal keeps the polarization state of the two optical signals unchanged.
- the first optical signal and the second optical signal both have a first polarization state, and the phase difference between the phase-shifted first optical signal and the second optical signal is ⁇ /2, the first light is After the signal is combined with the optical signal in which the second optical signal is in a polarization state, a QPSK modulated optical signal having a first polarization state of 40 Gb/s is output;
- optical signal combining can be performed in the following manner:
- the manner in which the optical signals are combined is not limited thereto, and may be performed in other manners.
- the method for implementing PDM-BPSK and QPSK modulation provided by the embodiment of the present invention controls the polarization state of the first optical signal, and performs phase shift on the first optical signal after the polarization state control, and the first phase after phase shifting
- the optical signal is combined with the optical signal of the second optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be Phase difference, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the present invention can be compatible with both PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- a 40 Gb/s QPSK optical signal and a 40 Gb/s PDM-BPSK optical signal are generated by compatible modulation.
- the method for implementing PDM-BPSK and QPSK modulation is as follows: 301: The direct current light is divided into a first path light and a second path light having the same power, the first path light has a first polarization state, and the second path light has a second polarization state, the first polarization state It is perpendicular to the second polarization state.
- the direct current light may be output by the LD, but is not limited thereto.
- the direct current light can be split by using a PBS (Polar Ion Beam Beam Splitter).
- PBS Polar Ion Beam Beam Splitter
- step 202 The manner of the photoelectric modulation can be referred to as described in step 202.
- the first optical signal after the polarization state control is divided into two cases:
- Case 1 The first optical signal after the polarization state control has a first polarization state
- Case 2 The first optical signal after the polarization state control has a second polarization state.
- the manner of controlling the polarization state may be as described in step 203.
- the optical carrier phase of the first optical signal may be an arbitrary value, that is, the phase shift of the first optical signal may not be performed. That is, the phase difference between the phase-shifted second optical signal and the first optical signal remains unchanged;
- the phase difference between the first optical signal and the second optical signal is ⁇ /2.
- the manner of the phase shift may be as described in step 204.
- optical signals may be as described in step 205.
- the method for implementing PDM-BPSK and QPSK modulation controls the polarization state of the first optical signal, and performs phase shift on the first optical signal after the polarization state control, and the first phase after phase shifting
- the optical signal is combined with the optical signal of the second optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be Phase difference, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the present invention can be compatible with both PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- a 40 Gb/s QPSK optical signal and a 40 Gb/s PDM-BPSK optical signal are generated by compatible modulation.
- the method for implementing PDM-BPSK and QPSK modulation is as follows:
- the phase-shifted first optical signal is divided into two cases:
- Case 1 the phase difference between the phase-shifted first optical signal and the second optical signal is ⁇ /2;
- Case 2 the phase between the phase-shifted first optical signal and the second optical signal
- the difference is an arbitrary value, that is, the phase shift of the first optical signal may not be performed, that is, the phase difference between the phase-shifted second optical signal and the first optical signal remains unchanged.
- phase shift may be as described in step 204.
- 404. Control a phase shifted first optical signal between a first polarization state and a second polarization state, wherein the first polarization state and the second polarization state are perpendicular to each other.
- the first optical signal is controlled to have a first polarization state
- the first optical signal is controlled to have the second polarization state.
- the manner of controlling the polarization state may be as described in step 203.
- optical signals may be as described in step 205.
- the method for implementing PDM-BPSK and QPSK modulation performs phase shifting on the first optical signal, and performs polarization state control on the phase-shifted first optical signal, and firstly controls the polarization state.
- the optical signal is combined with the optical signal of the second optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be Phase difference, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the present invention can be compatible with both PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- Embodiment 5 In this embodiment, a 40 Gb/s QPSK optical signal and a 40 Gb/s PDM-BPSK optical signal are generated by compatible modulation. For other bit rate cases, reference may be made to this embodiment.
- the compatible method for implementing PDM-BPSK and QPSK modulation includes:
- the phase-shifted first optical signal is divided into two cases:
- Case 1 the phase difference between the phase-shifted first optical signal and the second optical signal is ⁇ /2;
- Case 2 the phase between the phase-shifted first optical signal and the second optical signal
- the difference is an arbitrary value, that is, the phase shift of the first optical signal may not be performed, that is, the phase difference between the phase-shifted second optical signal and the first optical signal remains unchanged.
- the manner of the phase shift may be as described in step 204.
- the first optical signal is controlled to have a first polarization state.
- the manner of controlling the polarization state may be as described in step 203.
- the second optical signal when the first optical signal has a first polarization state, the second optical signal has a second polarization state, and the phase difference between the phase-shifted first optical signal and the second optical signal is an arbitrary value, Combining the optical signal of the first optical signal and the second optical signal in a polarization state, and outputting 40 Gb/s PDM-BPSK modulates the optical signal.
- optical signals may be as described in step 205.
- the method for implementing PDM-BPSK and QPSK modulation performs phase shifting on the first optical signal, and performs polarization state control on the phase-shifted first optical signal, and firstly controls the polarization state.
- the optical signal is combined with the optical signal of the second optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be Phase difference, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the present invention can be compatible with both PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- a 40 Gb/s QPSK optical signal and a 40 Gb/s PDM-BPSK optical signal are generated by compatible modulation.
- the compatible method for implementing PDM-BPSK and QPSK modulation includes:
- 601-602 refer to steps 201-202, and will not be mentioned here.
- the first optical signal after the polarization state control is divided into two cases:
- Case 1 The first optical signal after the polarization state control has a first polarization state
- Case 2 The first optical signal after the polarization state control has a second polarization state.
- the manner of controlling the polarization state may be as described in step 203.
- the phase difference between the second optical signal and the first optical signal is ⁇ /2;
- the optical carrier phase of the second optical signal may be an arbitrary value, that is, the second optical signal may not be phase-shifted. That is, the phase difference between the phase-shifted second optical signal and the first optical signal remains unchanged.
- the manner of the phase shift may be as described in step 204.
- the second optical signal has the first polarization state
- the phase difference between the phase-shifted second optical signal and the polarization-controlled first optical signal is an arbitrary value.
- the optical signal combining manner can be referred to as described in step 205.
- the method for implementing PDM-BPSK and QPSK modulation controls the polarization state of the first optical signal, and performs phase shift on the second optical signal to adjust the first optical signal and phase after the polarization state control.
- the shifted second optical signal performs an optical signal combining to maintain a polarization state, according to a relationship between polarization states of the first optical signal and the second optical signal, and a phase between the first optical signal and the second optical signal Poor, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the present invention can be compatible with both PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- a 40 Gb/s QPSK optical signal and a 40 Gb/s PDM-BPSK optical signal are generated by compatible modulation.
- the compatible method for implementing PDM-BPSK and QPSK modulation includes:
- the first optical signal after the polarization state control is divided into two cases: Case 1: The first optical signal after the polarization state control has a first polarization state;
- Case 2 The first optical signal after the polarization state control has a second polarization state.
- the manner of controlling the polarization state may be as described in step 203.
- the optical carrier phase of the second optical signal may be an arbitrary value, that is, the second optical signal may not be phase-shifted. , that is, the phase difference between the phase-shifted second optical signal and the first optical signal remains unchanged;
- the phase difference between the second optical signal and the first optical signal is ⁇ / 2 .
- the manner of the phase shift may be as described in step 204.
- the second optical signal has a second polarization state
- the phase difference between the phase-shifted second optical signal and the polarization-controlled first optical signal is arbitrary.
- the output is 4001)/8? 03 ⁇ 4 ⁇ _8?81 modulated optical signal;
- optical signals may be as described in step 205.
- the method for implementing PDM-BPSK and QPSK modulation controls the polarization state of the first optical signal, and performs phase shift on the second optical signal to adjust the first optical signal and phase after the polarization state control.
- the shifted second optical signal is combined with the optical signal that maintains the polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal and the relationship between the first optical signal and the second optical signal may be Phase difference, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the invention can be compatible with the implementation of PDM-BPSK and QPSK modulation modes, thereby saving design cost and increasing modulation flexibility.
- connection between the modules may utilize a method of spatial optical coupling or a method using a WIFI PLC.
- This embodiment provides a device compatible with PDM-BPSK and QPSK modulation. As shown in FIG. 8, the device includes:
- the splitting module 81 is configured to divide the direct current light into the first path light and the second path light of the same power; wherein the direct current light may be output by the LD, but is not limited thereto.
- the beam splitting module 81 can be implemented by using PS.
- the input light is specularly reflected and transmitted, and is divided into two output lights;
- the silicon-based PLC method it is realized by a silicon-based Y-type optical waveguide.
- it can also be implemented by other devices.
- a first modulation module 82 configured to perform photoelectric modulation on the first path light, and output a first optical signal in a BPSK format;
- the first modulation module 82 can be implemented by using MZM, and the DC offset of the MZM is set to be the lowest point of the transmission curve, and the two electrical signals having the same bit rate respectively drive the MZE in a differential manner.
- the first light is phase-modulated, and the first optical signal of the BPSK format of the bit rate whose polarization state is not changed is output;
- the MZM may be implemented by using a lithium niobate material, but is not limited thereto. Of course, it can also be implemented by other devices.
- a second modulation module 83 configured to perform photoelectric modulation on the second path light, and output a second optical signal in BPSK format
- the second modulation module 83 can be implemented by using MZM, and the DC offset of the MZM is set to be the lowest point of the transmission curve, and the two electrical signals having the same bit rate respectively drive the MZE in a differential manner.
- the second light is phase-modulated, and the second optical signal of the BPSK format of the bit rate whose polarization state is not changed is output;
- the MZM may be implemented by using a lithium niobate material, but is not limited thereto. Of course, it can also be implemented by other devices.
- the polarization state control module 84 is configured to perform polarization state control on the first optical signal, and the polarization states of the first optical signal and the second optical signal controlled by the polarization state are vertically orthogonal or consistent;
- the polarization state control module 84 can be implemented by using 0PC, and the polarization state is controlled by setting the working state of the 0PC.
- a half-wave plate is inserted into the spatial light path, and by rotating the axial position of the half-wave plate, when the axial direction of the half-wave plate is the same as the polarization state of the light, the output polarization state is the same as the input polarization state.
- the output polarization state and the input polarization state are perpendicular to each other; when using the silicon-based PLC method, the electronic control based on lithium niobate is integrated on the silicon substrate.
- the cascade wave plate controls the output polarization state by applying an appropriate power source to the wave plate.
- it can also be implemented by other devices.
- the phase shifting module 85 is configured to perform phase shifting on the first optical signal or the second optical signal, and the phase difference between the first optical signal and the second optical signal that is phase-shifted is ⁇ /2 or remains unchanged Change
- the phase shifting module 85 can be implemented by using OPS.
- OPS optical phase shifting method
- the carrier phase of the optical signal is changed by fine-tuning the optical path of the spatial optical path;
- the silicon-based PLC method is used, the refractive index of the material of the optical waveguide is changed by heating the silicon-based optical waveguide, thereby changing the light.
- the carrier phase of the signal can also be implemented by other devices.
- the combining module 86 is configured to combine the optical signals of the first optical signal and the second optical signal that are subjected to polarization state control and phase shift in a polarization state, and output a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- the combining module 86 can be implemented by using a PC with a polarization maintaining coupling function.
- the two input lights are combined and output as a beam of light by reflection or transmission; when using the silicon-based PLC method, it is realized by a silicon-based Y-type waveguide.
- the silicon-based PLC method it is realized by a silicon-based Y-type waveguide.
- other devices can also be used.
- the apparatus for implementing PDM-BPSK and QPSK modulation performs phase shift on the first optical signal or the second optical signal by performing polarization state control on the first optical signal, and performs polarization state control and phase Moving the first optical signal and the second optical signal to maintain a polarization state of the optical signal a path, thereby outputting a PDM-BPSK modulated optical signal or a QPSK modulated optical signal according to a relationship between polarization states of the first optical signal and the second optical signal, and a phase difference between the first optical signal and the second optical signal .
- the present invention can implement PDM-BPSK and QPSK modulation modes compatible with one device, thereby saving design cost and increasing modulation flexibility.
- This embodiment provides a device compatible with PDM-BPSK and QPSK modulation. As shown in FIG. 9, the device includes:
- the splitting module 81 is configured to divide the direct current into the first light and the second light of the same power; the first modulation module 82 is configured to perform photoelectric modulation on the first light, and output the first light in the BPSK format.
- a second modulation module 83 configured to perform photoelectric modulation on the second path light, and output a second optical signal in BPSK format
- the polarization state control module 84 is configured to perform polarization state control on the first optical signal, and the polarization states of the first optical signal and the second optical signal controlled by the polarization state are vertically orthogonal or consistent;
- the phase shifting module 85 is configured to perform phase shifting on the second optical signal, and the phase difference between the first optical signal and the second optical signal that is phase-shifted is ⁇ /2 or remains unchanged;
- the combining module 86 is configured to combine the polarization-controlled first optical signal and the phase-shifted second optical signal to maintain a polarization state, and output a PDM-BPSK modulated optical signal or QPSK modulation.
- Optical signal Optical signal.
- the polarization state control module 84 is specifically configured to perform polarization state control on the first optical signal of the BPSK format until the polarization states of the first optical signal and the second optical signal are consistent;
- the phase shifting module 85 is specifically configured to phase shift the second optical signal of the BPSK format to a phase difference between the first optical signal and the second optical signal of ⁇ /2;
- the combining module 86 will pass the first optical signal of the polarization state control module 84 and The second optical signal of the phase shifting module 85 performs an optical signal combining polarization state to output a QPSK modulated optical signal.
- the polarization state control module 84 is specifically configured to perform polarization state control on a first optical signal of the BPSK format to a vertical orthogonal state of polarization states of the first optical signal and the second optical signal. ;
- the phase shifting module 85 is specifically configured to phase shift the second optical signal of the BPSK format by an arbitrary value, or the phase shifting module 85 does not phase shift the second optical signal, that is, after the phase shift The phase difference between the two optical signals and the first optical signal remains unchanged;
- the combining module 86 combines the first optical signal that passes through the polarization state control module 84 with the optical signal that is in a polarization state through the second optical signal of the phase shifting module 85, and outputs PDM-BPSK modulates the optical signal.
- each module refers to the corresponding modules in the eighth embodiment.
- the apparatus for implementing PDM-BPSK and QPSK modulation controls the polarization state of the first optical signal, performs phase shift on the second optical signal, and controls the first optical signal after the polarization state control.
- the phase-shifted second optical signal is combined with the optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be
- the phase difference is outputted by a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- the present invention can implement PDM-BPSK and QPSK modulation modes by using one device, thereby saving design cost and increasing modulation flexibility.
- the embodiment provides a device compatible with PDM-BPSK and QPSK modulation. As shown in FIG. 10, the device includes:
- the splitting module 81 is configured to divide the direct current into the first light and the second light of the same power; the first modulation module 82 is configured to perform photoelectric modulation on the first light, and output the first light in the BPSK format.
- a second modulation module 83 configured to perform photoelectric modulation on the second path light, and output the BPSK format Second optical signal
- the phase shifting module 85 is configured to perform phase shifting on the first optical signal, and the phase difference between the first optical signal and the second optical signal that is phase-shifted is ⁇ /2 or remains unchanged;
- a polarization state control module 84 configured to perform polarization state control on the phase-shifted first optical signal, wherein a polarization state of the first optical signal and the second optical signal controlled by a polarization state is vertically orthogonal or be consistent;
- the combining module 86 is configured to combine the first optical signal after the polarization state control and the optical signal in which the second optical signal is in a polarization state, and output a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- each module refers to the corresponding modules in the eighth embodiment.
- the apparatus for implementing PDM-BPSK and QPSK modulation performs phase shifting on the first optical signal, and performs polarization state control on the phase-shifted first optical signal, and firstly controls the polarization state.
- the optical signal is combined with the optical signal of the second optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be
- the phase difference is outputted by a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- the present invention can implement PDM-BPSK and QPSK modulation modes by using one device, thereby saving design cost and increasing modulation flexibility.
- the embodiment provides a device compatible with PDM-BPSK and QPSK modulation. As shown in FIG. 11, the device includes:
- the splitting module 81 is configured to divide the direct current into the first light and the second light of the same power; the first modulation module 82 is configured to perform photoelectric modulation on the first light, and output the first light in the BPSK format.
- a second modulation module 83 configured to perform photoelectric modulation on the second path light, and output the BPSK format Second optical signal
- the polarization state control module 84 is configured to perform polarization state control on the first optical signal, and the polarization states of the first optical signal and the second optical signal controlled by the polarization state are vertically orthogonal or consistent;
- the phase shifting module 85 is configured to perform phase shifting on the first optical signal after the polarization state control, and the phase difference of the phase difference between the first optical signal and the second optical signal is ⁇ /2 or remain unchanged Change
- the combining module 86 is configured to combine the phase-shifted first optical signal and the second optical signal to maintain an optical signal of a polarization state, and output a PDM-BPSK modulated optical signal or a QPSK modulated optical signal.
- each module refers to the corresponding modules in the eighth embodiment.
- the apparatus for implementing PDM-BPSK and QPSK modulation controls the polarization state of the first optical signal, and performs phase shift on the first optical signal after the polarization state control, and the first phase after phase shifting
- the optical signal is combined with the optical signal of the second optical signal in a polarization state, so that the relationship between the polarization states of the first optical signal and the second optical signal, and between the first optical signal and the second optical signal may be Phase difference, output PDM-BPSK modulated optical signal or QPSK modulated optical signal.
- the present invention can implement PDM-BPSK and QPSK modulation modes by using one device, thereby saving design cost and increasing modulation flexibility.
- the apparatus for implementing PDM-BPSK and QPSK modulation provided by the embodiments of the present invention can implement the method embodiments provided above.
- the method and apparatus compatible with implementing PDM-BPSK and QPSK modulation provided by the embodiments of the present invention can be applied to compatible modulation of PDM-BPSK and QPSK, but is not limited thereto.
- the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
- ROM read-only memory
- RAM random access memory
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Communication System (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES10842836.8T ES2616564T3 (es) | 2010-01-14 | 2010-01-14 | Procedimiento y aparato para realizar de manera compatible una modulación PDM-BPSK y QPSK |
PCT/CN2010/070193 WO2011085552A1 (zh) | 2010-01-14 | 2010-01-14 | 兼容实现pdm-bpsk和qpsk调制的方法及装置 |
CA2782145A CA2782145C (en) | 2010-01-14 | 2010-01-14 | Method and apparatus for implementing pdm-bpsk modulation and qpsk modulation in compatible manner |
CN201080003331.0A CN102204201B (zh) | 2010-01-14 | 2010-01-14 | 兼容实现pdm-bpsk和qpsk调制的方法及装置 |
EP10842836.8A EP2495925B1 (en) | 2010-01-14 | 2010-01-14 | Method and apparatus for compatibly realizing pdm-bpsk and qpsk modulation |
US13/545,637 US8737844B2 (en) | 2010-01-14 | 2012-07-10 | Method and apparatus for implementing PDM-BPSK modulation and QPSK modulation in compatible manner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2010/070193 WO2011085552A1 (zh) | 2010-01-14 | 2010-01-14 | 兼容实现pdm-bpsk和qpsk调制的方法及装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/545,637 Continuation US8737844B2 (en) | 2010-01-14 | 2012-07-10 | Method and apparatus for implementing PDM-BPSK modulation and QPSK modulation in compatible manner |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011085552A1 true WO2011085552A1 (zh) | 2011-07-21 |
Family
ID=44303808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2010/070193 WO2011085552A1 (zh) | 2010-01-14 | 2010-01-14 | 兼容实现pdm-bpsk和qpsk调制的方法及装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8737844B2 (zh) |
EP (1) | EP2495925B1 (zh) |
CN (1) | CN102204201B (zh) |
CA (1) | CA2782145C (zh) |
ES (1) | ES2616564T3 (zh) |
WO (1) | WO2011085552A1 (zh) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102439887B (zh) * | 2011-10-18 | 2015-01-07 | 华为技术有限公司 | 信号调制装置和调制方法 |
US9223184B2 (en) * | 2011-12-22 | 2015-12-29 | Nippon Telegraph And Telephone Corporation | Optical modulator |
US10187159B2 (en) * | 2014-07-07 | 2019-01-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Optical source |
CN104218992B (zh) * | 2014-09-15 | 2017-01-25 | 中国科学院半导体研究所 | 一种零差检测型相干光传输系统 |
US9634786B2 (en) | 2015-02-13 | 2017-04-25 | Georgia Tech Research Corporation | Communication systems with phase-correlated orthogonally-polarized light-stream generator |
US10551714B2 (en) * | 2017-05-17 | 2020-02-04 | Finisar Sweden Ab | Optical device |
CN112565138B (zh) * | 2020-12-11 | 2023-03-17 | 武汉邮电科学研究院有限公司 | 一种信号调制传输方法及装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1266851A (zh) * | 1999-03-16 | 2000-09-20 | Sk株式会社 | α-维生素E环丙烷羧酸酯、新的维生素E衍生物及其制备方法 |
US20050111582A1 (en) * | 2003-10-17 | 2005-05-26 | Sony Corporation | Digital modulation circuit and method as well as digital demodulation circuit and method |
CN101232479A (zh) * | 2006-10-11 | 2008-07-30 | 鲍东山 | 在兼容dab的t-mmb系统中使用多种调制方式的方法和系统 |
CN101267255A (zh) * | 2008-02-20 | 2008-09-17 | 上海大学 | 毫米波光纤传输系统中双路光相位调制毫米波生成及提供远程本振的系统和方法 |
JP2009100298A (ja) * | 2007-10-17 | 2009-05-07 | Panasonic Corp | 受信装置および受信方法 |
KR20090050134A (ko) * | 2007-11-15 | 2009-05-20 | 삼성전자주식회사 | 이동통신 시스템의 데이터 전송 장치 및 방법 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100745749B1 (ko) | 2002-04-25 | 2007-08-02 | 삼성전자주식회사 | 광섬유-라디오 혼합 양방향 통신 장치 및 방법 |
US7460793B2 (en) | 2002-12-11 | 2008-12-02 | Michael George Taylor | Coherent optical detection and signal processing method and system |
DE102004047028A1 (de) * | 2004-09-28 | 2006-04-20 | Siemens Ag | Verfahren und Anordnung zur optischen Übertragung von Datensignalen mittels differentieller Phasenmodulation in einem Polarisations-Multiplexverfahren |
CA2595628C (en) * | 2005-01-26 | 2013-04-16 | Nokia Siemens Networks Gmbh & Co. Kg | Method for the optical transmission of polarization multiplex signals |
US7398022B2 (en) * | 2005-07-08 | 2008-07-08 | Mario Zitelli | Optical return-to-zero phase-shift keying with improved transmitters |
CN101350673B (zh) | 2007-07-20 | 2011-04-20 | 上海交通大学 | 混合码型光信号发射设备和方法 |
CN101505192B (zh) | 2008-02-04 | 2011-09-21 | 华为技术有限公司 | 一种产生差分正交相移键控码光信号的方法及装置 |
US8238759B2 (en) * | 2008-02-14 | 2012-08-07 | Infinera Corporation | High capacity transmitter implemented on a photonic integrated circuit |
EP2109233B1 (en) * | 2008-04-11 | 2010-08-04 | Alcatel Lucent | Modulation scheme with increased number of states of polarization |
CN101577589B (zh) * | 2008-05-05 | 2012-08-22 | 华为技术有限公司 | 一种光调制装置、方法和色散预补偿发射机 |
-
2010
- 2010-01-14 EP EP10842836.8A patent/EP2495925B1/en not_active Not-in-force
- 2010-01-14 CN CN201080003331.0A patent/CN102204201B/zh not_active Expired - Fee Related
- 2010-01-14 CA CA2782145A patent/CA2782145C/en not_active Expired - Fee Related
- 2010-01-14 WO PCT/CN2010/070193 patent/WO2011085552A1/zh active Application Filing
- 2010-01-14 ES ES10842836.8T patent/ES2616564T3/es active Active
-
2012
- 2012-07-10 US US13/545,637 patent/US8737844B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1266851A (zh) * | 1999-03-16 | 2000-09-20 | Sk株式会社 | α-维生素E环丙烷羧酸酯、新的维生素E衍生物及其制备方法 |
US20050111582A1 (en) * | 2003-10-17 | 2005-05-26 | Sony Corporation | Digital modulation circuit and method as well as digital demodulation circuit and method |
CN101232479A (zh) * | 2006-10-11 | 2008-07-30 | 鲍东山 | 在兼容dab的t-mmb系统中使用多种调制方式的方法和系统 |
JP2009100298A (ja) * | 2007-10-17 | 2009-05-07 | Panasonic Corp | 受信装置および受信方法 |
KR20090050134A (ko) * | 2007-11-15 | 2009-05-20 | 삼성전자주식회사 | 이동통신 시스템의 데이터 전송 장치 및 방법 |
CN101267255A (zh) * | 2008-02-20 | 2008-09-17 | 上海大学 | 毫米波光纤传输系统中双路光相位调制毫米波生成及提供远程本振的系统和方法 |
Also Published As
Publication number | Publication date |
---|---|
CA2782145A1 (en) | 2011-07-21 |
EP2495925A1 (en) | 2012-09-05 |
US8737844B2 (en) | 2014-05-27 |
EP2495925B1 (en) | 2016-12-07 |
CN102204201B (zh) | 2013-11-06 |
CA2782145C (en) | 2014-12-02 |
EP2495925A4 (en) | 2012-10-03 |
ES2616564T3 (es) | 2017-06-13 |
CN102204201A (zh) | 2011-09-28 |
US20120275791A1 (en) | 2012-11-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10148364B2 (en) | Polarization demultiplexing of optical signals | |
US8831440B2 (en) | Method and device for generating optical signals | |
WO2011085552A1 (zh) | 兼容实现pdm-bpsk和qpsk调制的方法及装置 | |
KR100703410B1 (ko) | 오프셋 직교위상편이 변조 방법과 이를 이용한 광송신기 | |
US20040208646A1 (en) | System and method for multi-level phase modulated communication | |
US10491307B2 (en) | Optical transmitter | |
US9337936B2 (en) | Optical transmission apparatus, optical transmission method and program for optical transmission | |
CN101505192A (zh) | 一种产生差分正交相移键控码光信号的方法及装置 | |
WO2012157182A1 (ja) | 信号同期送信システム、光変調器用同期駆動システム、信号同期送信方法及びそのプログラムが格納された非一時的なコンピュータ可読媒体 | |
US9509411B2 (en) | Phase shift keying optical modulation apparatus and method of encoding a symbol onto an optical carrier signal | |
CN111371499A (zh) | 一种调制装置和光发射机 | |
KR20130118957A (ko) | 편광 분할 다중화를 이용하는 광 송신 | |
JP7073540B2 (ja) | 多変調フォーマットの互換性を備えた高速レーザー信号発生システム及び方法 | |
CN107534488B (zh) | 虚拟光生成装置、光传输装置及虚拟光生成方法 | |
JP6863147B2 (ja) | 光送信器、変調方法、及び光伝送装置 | |
CN102439887A (zh) | 信号调制装置和调制方法 | |
JP7492158B2 (ja) | 光送信器 | |
EP2579484A1 (en) | Method of generating PM iNRZ-xPSK modulation format | |
JP6106062B2 (ja) | 光変調器 | |
CN118715733A (zh) | Ic-trosa点到多点光网络系统 | |
JP2013247602A (ja) | 16qam光信号を生成する送信装置および方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080003331.0 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10842836 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2782145 Country of ref document: CA |
|
REEP | Request for entry into the european phase |
Ref document number: 2010842836 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010842836 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |