Control signal transmission device for quantum computer

Abstract

The invention provides a control signal transmission device for a quantum computer. The control signal transmission device comprises a laser light source, a digital-to-analog converter, an electro-optical modulation circuit, an optical fiber, a photoelectrolysis modulation circuit and a plurality of quantum bits. The laser light source provides light. The digital-to-analog converter provides a plurality of first control signals. An electro-optical modulation circuit integrates the first control signal into the light to generate an optical signal. An electro-optical modulation circuit provides the optical signal to the optical fiber. The photodemodulating circuit converts and splits the optical signal into a plurality of second control signals. And the photoelectrolysis modulation circuit transmits the second control signal to the corresponding quantum bit. And the quantum bits are controlled by the corresponding second control signals. The environment temperature set by the photolysis modulation circuit and the quantum bit is far lower than a default temperature value.

Description

Technical Field

[0001] The present invention relates to a quantum computer and a control signal transmission technology, and in particular to a control signal transmission device for a quantum computer. Background Art

[0002] Quantum computers are devices and technologies that utilize quantum bits (qubits) and the quantum logic within them to perform general-purpose computing. The concept of a quantum computer aims to manipulate quantum states, recording and computing information by measuring them. Qubits can simultaneously represent both 0 and 1, unlike traditional computers, which can only record one bit of information at a time. In theory, the instruction cycle of a quantum computer could surpass that of current computers.

[0003] Currently known qubit technologies require extremely low temperatures to operate properly, while the equipment used to control qubits typically operates only at room temperature. To simultaneously control a large number of qubits for computation, the number of control signals must be increased accordingly, and these signals must be transmitted via transmission lines from room temperature to the qubits in the extremely low temperature environment. However, in addition to transmitting signals, transmission lines also transfer heat, and the signal transmission process also consumes power and generates heat. Even using attenuators to reduce the power of the control signal cannot avoid the transfer of heat. Therefore, increasing the number of transmission lines makes it difficult to maintain an extremely low temperature environment, making qubit errors more likely to occur. Summary of the Invention

[0004] The present invention provides a control signal transmission device for a quantum computer. It uses optical fiber communication combined with multiple optical modulation technologies to transmit control signals for a large number of quantum bits via a single transmission line, reducing the introduction of heat energy into the extremely low temperature environment and facilitating the maintenance of thermal insulation in the extremely low temperature environment.

[0005] According to an embodiment of the present invention, a control signal transmission device for a quantum computer includes a laser light source, a digital-to-analog converter, an electro-optical modulation circuit, an optical fiber, an optoelectronic demodulation circuit, and a plurality of quantum bits. The laser light source provides light. The digital-to-analog converter provides a plurality of first control signals. The electro-optical modulation circuit is coupled to the digital-to-analog converter and the laser light source. The electro-optical modulation circuit integrates the first control signals into the light to generate an optical signal. The optical fiber is coupled to the electro-optical modulation circuit. The electro-optical modulation circuit provides the optical signal to the optical fiber. The optoelectronic demodulation circuit is coupled to the optical fiber to convert and split the optical signal into a plurality of second control signals. A plurality of quantum bits are coupled to the optoelectronic demodulation circuit. The optoelectronic demodulation circuit transmits the second control signals to the corresponding quantum bits. The quantum bits are controlled by the corresponding second control signals. The ambient temperature set for the optoelectronic demodulation circuit and the quantum bits is lower than a default temperature value.

[0006] Based on the above, the quantum computer and control signal transmission technology described in the embodiments of the present invention utilize multiple optical modulation technologies (e.g., frequency division multiplexing (FDM), wavelength division multiplexing (WDM), polarization multiplexing (Pol-Mux), and a combination of these multiplexing technologies) to integrate a large number of control signals into a light carrier as a signal carrier, and use a single optical fiber as a transmission line, thereby achieving a quantum computer control architecture that transmits signals that control a large number of quantum bits. The aforementioned architecture can reduce the introduction of heat energy into the extremely low temperature environment, facilitating the maintenance of thermal insulation in the extremely low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 FIG. 4 is a block diagram of a control signal transmission device for a quantum computer according to a first embodiment of the present invention.

[0008] Figures 2A to 2B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 1 for a quantum computer according to a second embodiment of the present invention.

[0009] Figures 3A to 3B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 2 for a quantum computer according to a third embodiment of the present invention.

[0010] Figures 4A to 4B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 3 for a quantum computer according to a fourth embodiment of the present invention.

[0011] Figures 5A to 5B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 4 for a quantum computer according to a fifth embodiment of the present invention.

[0012] Figures 6A to 6B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 5 for a quantum computer according to a sixth embodiment of the present invention.

[0013] 7A to 7D 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 6 for a quantum computer according to a seventh embodiment of the present invention.

[0014] Figures 8A to 8F 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 7 for a quantum computer according to an eighth embodiment of the present invention. DETAILED DESCRIPTION

[0015] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0016] To maintain the ultra-low temperature environment where the qubits reside and avoid damaging the thermal insulation of this ultra-low temperature environment, embodiments of the present invention utilize optical fiber communication to transmit control signals from a room temperature environment to the ultra-low temperature environment where the qubits reside. Furthermore, through various optical modulation techniques, a large number of control signals are multiplexed and integrated into the optical carrier that serves as the signal carrier. The advantage of optical fiber communication is that it carries almost no heat when transmitting data, and optical signals have near-infinite bandwidth, making them ideally suited for quantum computer applications. Transmitting this optical carrier into the ultra-low temperature environment allows a corresponding demodulator to receive and deconstruct these control signals, which are then delivered to their respective qubits. This achieves a signal transmission architecture that uses a single optical fiber to transmit a large number of control signals to control the qubits and is suitable for use in quantum computers. The following presents various control signal transmission devices and circuit architectures for quantum computers as various embodiments of the present invention. Applications of these embodiments can extend these embodiments to other implementations consistent with the present invention, based on their specific needs.

[0017] Figure 1 FIG. 4 is a block diagram of a control signal transmission device for a quantum computer according to a first embodiment of the present invention. Figure 1 The control signal transmission device 100 for a quantum computer includes a laser light source 110, a digital-to-analog converter 120, an electro-optical modulation circuit 130, an optical fiber 150, an optoelectronic demodulation circuit 140, and a plurality of quantum bits QB1 to QBX, where X is a positive integer.

[0018] Laser light source 110 provides light L1. A digital-to-analog converter 120 provides a plurality of first control signals CQ1 to CQX. An electro-optical modulation circuit 130 is coupled to the digital-to-analog converter 120 and the laser light source 110. The electro-optical modulation circuit 130 integrates the first control signals CQ1 to CQX into light L1 to generate an optical signal FLS. An optical fiber 150 couples the electro-optical modulation circuit 130, located in a room temperature environment, and the optoelectronic demodulation circuit 140, located in a low-temperature environment 105. The optoelectronic demodulation circuit 140 converts and splits the optical signal FLS into a plurality of second control signals TCQ1 to TCQX. The optoelectronic demodulation circuit 140 transmits the second control signals TCQ1 to TCQX to the corresponding qubits QB1 to QBX. The qubits QB1 to QBX are controlled by their respective second control signals TCQ1 to TCQX. The temperature of the low-temperature environment 105 set by the optoelectronic demodulation circuit 140 and the qubits QB1 to QBX is significantly lower than a default value. This default temperature value is primarily determined based on the extremely low temperature environment in which qubits QB1 through QBX are to be maintained. For example, the default temperature value may be 1K (-272.15°C), while the temperature of the low-temperature environment 105 is significantly lower than 1K (-272.15°C). Users of this embodiment may adjust and set this default temperature value based on current technology for setting qubit temperatures, and this default temperature value is not limited to the aforementioned example.

[0019] In this embodiment, the control signals for controlling the quantum bits QB1 to QBX are transmitted by optical fiber communication, and a large number of control signals (e.g., the first control signals CQ1 to CQX) are integrated into the optical carrier as the signal carrier. The optical modulation technology used to integrate the control signal includes at least frequency division multiplexing (FDM) technology, wavelength division multiplexing (WDM) technology, polarization multiplexing (Pol-Mux) technology, and any combination of these multiplexing technologies, so that the optical signal FLS on the same optical fiber 150 can carry a large number of control signals, and the optical fiber 150 is used to allow devices in a normal temperature environment (e.g., electro-optical modulation circuit 130) and devices in a low temperature environment 105 (e.g., photoelectric demodulation circuit 140) to communicate with each other. Since these optical modulation technologies and multiplexing technologies mainly vary in Figure 1 Among the electro-optical modulation circuit 130 and the photoelectric demodulation circuit 140, the embodiment of the present invention is Figures 2A to 8F The circuit structure and operation mode of the electro-optical modulation circuit and the photoelectric demodulation circuit in different embodiments are mainly described.

[0020] Figures 2A to 2B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 1 for a quantum computer according to a second embodiment of the present invention. Figure 2AThe control signal transmission device 100 - 1 integrates N control signals CQ1 to CQN into the optical signal FLS of the optical fiber 150 using frequency division multiplexing (FDM) technology, where N is a positive integer.

[0021] Figure 2A The electro-optical modulation circuit 130-1 includes N mixers 132-1, a frequency integration multiplexer 133, and an electro-optical modulator 134-1. The N mixers 132-1 are coupled to the digital-to-analog converter 120 to receive corresponding first control signals CQ1 to CQN and adjust the corresponding first control signals CQ1 to CQN to different frequencies to generate N mixed signals. The bandwidth is primarily limited by the frequencies adjusted by the N mixers 132-1. The frequency integration multiplexer 130 is coupled to the N mixers 132-1. The frequency integration multiplexer 130 integrates these mixed signals according to the different frequencies of the aforementioned signals into a combined signal MCQ. The electro-optical modulator 134-1 is coupled to the frequency integration multiplexer 133 and the laser light source 110. The electro-optical modulator 134-1 integrates the combined signal MCQ into the light L1 provided by the laser light source 110 to generate the optical signal FLS. The wavelength of the optical signal FLS provided by this embodiment 134-1 is represented as wavelength λ1.

[0022] Figure 2A The photoelectric demodulation circuit 140-1 includes a photodetector 142-1 and a frequency division multiplexer 143. The photodetector 142-1 is coupled to the optical fiber 150 and converts the optical signal FLS into an electrical signal DCQ. The frequency division multiplexer 143 is coupled to the photodetector 142-1. The frequency division multiplexer 143 divides the electrical signal DCQ into second control signals TCQ1 through TCQN based on the different frequencies adjusted by the N mixers 132-1 to the N mixed signals. The number of second control signals TCQ1 through TCQN is N.

[0023] Figure 2B The modulation of each signal in this embodiment is presented using specific signals. The first control signal CQ1 and the second control signal TCQ1 are both electrical signals with a frequency of f1. The integrated signal MCQ and the electrical signal DCQ are signals obtained by integrating the aforementioned control signals CQ1 to CQN and TCQ1 to TCQN. Therefore, their electrical signal waveforms have multiple frequencies f1 to fn. The optical signal FLS modulated by the electro-optical modulator 134-1 is presented as follows: Figure 2B As shown, the optical signal FLS generates corresponding waveforms at corresponding wavelengths because the wavelength λ1 is separated by a distance (the value of the speed of light C divided by the frequency f1).

[0024] from Figure 2A and Figure 2B I know that Figure 2A The control signal transmission device 100 - 1 utilizes a frequency integrated multiplexer 133 and frequency division multiplexing (FDM) technology to integrate multiple control signals into an optical carrier, and utilizes a frequency division multiplexer 143 to split the optical signal FLS to obtain a large number of control signals for controlling quantum bits QB1 to QBN in the low-temperature environment 105 .

[0025] Figures 3A to 3B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 2 for a quantum computer according to a third embodiment of the present invention. Figure 3A Control signal transmission device 100-2 uses polarization multiplexing (Pol-Mux) technology to integrate P control signals CQ1 through CQP into optical signal FLS of optical fiber 150, where P is a positive integer. In optical fiber transmission technology, two optical fibers can be distinguished by their polarizations differing by 90 degrees. In other words, the light can be distinguished into two different types of light with polarities differing by 90 degrees. Therefore, P in this embodiment is 2.

[0026] Figure 3A The electro-optical modulation circuit 130-2 includes two mixers 132-2, an optical splitter 135, two electro-optical modulators 134-21 and 134-22, and a polarization beam combiner 136. The two mixers 132-2 are coupled to the digital-to-analog converter 120 to receive the corresponding first control signals CQ1 and CQ2, and increase the frequency of the corresponding first control signals CQ1 and CQ2 to generate two up-converted signals CQ'1 and CQ'2. The two mixers 132-2 increase the first control signals CQ1 and CQ2 to the same frequency (e.g., Figure 3B frequency f1).

[0027] An optical splitter 135 is coupled to the laser light source 110. The optical splitter 135 splits the light beam L1 into two sub-light beams SL1 and SL2. Two electro-optical modulators 134-21 and 134-22 are coupled to the optical splitter 135 and the mixer 132-2, respectively. The two electro-optical modulators 134-21 and 134-22 receive corresponding upconverted signals CQ'1 and CQ'2 from the corresponding mixer 132-2 and integrate the corresponding upconverted signals CQ'1 and CQ'2 into the sub-light beams SL1 and SL2 to form two modulated optical signals, one of which is denoted as PCQ1. The electro-optical modulators 134-21 and 134-22 have the same wavelength λ1. Each electro-optical modulator 134-21 and 134-22 integrates the upconverted signals CQG1 and CQG2 into the optical signal based on its corresponding wavelength λ1. Polarization beam combiner 136 is coupled to electro-optical modulators 134-21 and 134-22. Polarization beam combiner 136 receives and combines the modulated optical signals to generate optical signal FLS. In this embodiment, the two modulated optical signals (one of which is modulated optical signal PCQ1) generated by electro-optical modulators 134-21 and 134-22 have the same polarization direction. After entering polarization beam combiner 136, polarization beam combiner 136 combines the two modulated optical signals according to different polarization directions to generate optical signal FLS.

[0028] Figure 3A Optoelectronic demodulation circuit 140-2 includes a polarization multiplexer 144 and photodetectors 142-21 and 142-22. Polarization multiplexer 144 is coupled to optical fiber 150. Polarization multiplexer 144 converts optical signal FLS into two differentiated optical signals DCQ1 and DCQ2 based on the aforementioned different polarization directions. The two photodetectors 142-21 and 142-22 are respectively coupled to polarization multiplexer 144. The two photodetectors 142-21 and 142-22 generate second control signals TCQ1 and TCQ2 based on the corresponding differentiated optical signals DCQ1 and DCQ2, respectively.

[0029] Figure 3B The modulation of each signal in this embodiment is presented using a specific signal. The up-converted signal CQ'1 and the differentiated optical signal DCQ1 both represent optical signals that are separated from the wavelength λ1 by a distance (the value of the speed of light C divided by the frequency f1) and produce corresponding waveforms at corresponding wavelengths. The optical signal FLS modulated by the electro-optical modulator 134-2 is presented as follows: Figure 2B As shown, the polarity of the optical signal FLS will generate corresponding waveforms at corresponding wavelengths due to the wavelength λ1 being separated by a distance (the value of the speed of light C divided by the frequency f1), and the polarity between the two waveforms presents a 90-degree angle difference.

[0030] from Figure 3A and Figure 3B I know that Figure 3A The control signal transmission device 100-2 utilizes an optical splitter 135, a polarization beamformer 136, and polarization multiplexing (Pol-Mux) technology to integrate the two control signals into an optical carrier, and utilizes a polarization multiplexer 143 to split the optical signal FLS to obtain two second control signals TCQ1 and TCQ2 for controlling the quantum bits QB1 to QBN in the low-temperature environment 105.

[0031] Figures 4A to 4B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 3 for a quantum computer according to a fourth embodiment of the present invention. Figure 4A The control signal transmission device 100 - 3 integrates M control signals CQ1 to CQM into the optical signal FLS of the optical fiber 150 using wavelength division multiplexing (WDM) technology, where M is a positive integer.

[0032] Figure 4A The electro-optical modulation circuit 130-3 includes M mixers 132-31 to 132-3M, an optical frequency comb generator 137, a first wavelength division multiplexer 138, M electro-optical modulators 134-31 to 134-3M, and a wavelength beam synthesizer 139. The M mixers 132-31 to 132-3M are coupled to the digital-to-analog converter 120 to receive corresponding first control signals CQ1 to CQM and increase the frequency of the corresponding first control signals CQ1 to CQM to generate M up-converted signals (herein, up-converted signals CQ'1, CQ'2, and CQ'M are used as examples). The optical frequency comb generator 137 is coupled to the laser light source 110. The optical frequency comb generator 137 converts the light L1 into multi-wavelength light WL according to different wavelengths. The first wavelength division multiplexer 138 is coupled to the optical frequency comb generator 137. The first wavelength demultiplexer 138 divides the multi-wavelength light WL into M specific wavelength lights according to the different wavelengths.

[0033] M electro-optical modulators 134-31 to 134-3M are coupled to a first wavelength demultiplexer 138 and mixers 132-31 to 132-3M. Each of the M electro-optical modulators 134-31 to 134-3M receives a corresponding upconverted signal from the corresponding mixer 132-31 to 132-3M and integrates the corresponding upconverted signals CQ'1, CQ'2, ..., CQ'M into the specific wavelength light corresponding to the aforementioned different wavelengths to generate M first demultiplexed optical signals (herein, the first demultiplexed optical signal PCQ1 is used as an example). Figure 4AElectro-optical modulators 134-31 through 134-3M each have a different wavelength λ1, λ2, ..., λn. Each electro-optical modulator 134-31 through 134-3M integrates the upconverted signals CQ'1, CQ'2, ..., CQ'M into an optical signal based on its corresponding wavelength λ1, λ2, ..., λn. A wavelength beam combiner 139 is coupled to electro-optical modulators 134-31 through 134-3M. Wavelength beam combiner 139 receives and integrates the first demultiplexed optical signal to generate an optical signal FLS.

[0034] Figure 4A Electro-optical modulation circuit 140-3 includes a second wavelength division multiplexer 145 and M photodetectors 142-31 through 142-3M. Second wavelength division multiplexer 145 is coupled to optical fiber 150 and converts optical signal FLS into M second demultiplexed optical signals DCQ1 through DCQM based on the different wavelengths used by first wavelength division multiplexer 138. M photodetectors 142-31 through 142-3M are coupled to second wavelength division multiplexer 145. M photodetectors 142-31 through 142-3M generate second control signals TCQ1 through TCQM based on the second demultiplexed optical signals DCQ1 through DCQM.

[0035] Figure 4B The modulation of each signal in this embodiment is presented by a specific signal. The up-converted signal CQ'1 and the second control signal TCQ1 are both electrical signals of frequency f1. Figure 4B As shown, there are optical signals with different waveforms at multiple different wavelengths λ1, λ2...λn. The wavelength spacing Δλ between these wavelengths λ1, λ2...λn is constant, that is, the spacing Δλ between adjacent wavelengths is the same. The first demultiplexed optical signal PCQ1 and the second demultiplexed optical signal DCQ1 are both optical signals with corresponding waveforms at corresponding wavelengths at a distance (the value of the speed of light C divided by the frequency f1) from the wavelength λ1. The optical signal FLS modulated by the electro-optical modulation circuit 130-3 is as shown. Figure 4B As shown, the optical signal FLS has multiple wavelengths λ'1, λ'2, ... λ'n, and generates optical signals of corresponding waveforms at these wavelengths λ'1, λ'2, ... λ'n. These wavelengths λ'1, λ'2, ... λ'n are the values ​​of the corresponding wavelengths λ1, λ2, ... λn plus a distance (the speed of light C divided by the frequency f1).

[0036] from Figure 4A and Figure 4B I know that Figure 4AThe control signal transmission device 100-3 utilizes an optical frequency comb generator 137, a first wavelength division multiplexer 138, a wavelength beam synthesizer 139, and wavelength division multiplexing (WDM) technology to integrate multiple control signals into an optical carrier, and utilizes a second wavelength division multiplexer 145 to split the optical signal FLS to obtain a large number of control signals for controlling quantum bits QB1 to QBM in the low-temperature environment 105.

[0037] Figures 5A to 5B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 4 for a quantum computer according to a fifth embodiment of the present invention. Figure 5A The control signal transmission device 100-4 uses frequency division multiplexing (FDM) technology combined with polarization multiplexing (Pol-Mux) technology to integrate N times P (P is 2) control signals CQ11 to CQ1N, CQ21 to CQ2N into the optical signal FLS of the optical fiber 150, where N and P are both positive integers. As mentioned above, due to the limitation of the number of polarizations of light, P is set to 2 in this embodiment. In other words, part of the circuit of the control signal transmission device 100-4 is similar to the aforementioned Figure 2A and Figure 3A The circuit is similar, and the same component numbers are used for some components.

[0038] Figure 5A The electro-optical modulation circuit 130-4 includes two frequency-dividing modulation circuits GSG1 and GSG2, an optical splitter 135, two electro-optical modulators 134-21 and 134-22, and a polarization beamformer 136. Each frequency-dividing modulation circuit GSG1 / GSG2 receives N first control signals CQ11 to CQ1N / CQ21 to CQ2N to generate one of two frequency-divided signals, such as frequency-divided signals CQG1 / CQG2. The optical splitter 135 splits the light L1 into two sub-lights SL1 and SL2. The two electro-optical modulators 134-21 and 134-22 receive the corresponding frequency-divided signals CQG1 and CQG2 from the corresponding frequency-dividing modulation circuits GSG1 and GSG2 and combine the corresponding frequency-divided signals CQG1 and CQG2 into the sub-lights SL1 and SL2 to generate two modulated optical signals with different polarization directions (modulated optical signal PCQ1 is used as an example here). The electro-optical modulators 134-21 and 134-22 have the same wavelength λ1, and each electro-optical modulator 134-21 and 134-22 integrates the upconverted signals CQG1 and CQG2 into the optical signal based on its corresponding wavelength λ1. The polarization beam combiner 136 receives and integrates the modulated optical signals to generate an optical signal FLS.

[0039] Figure 5AEach frequency division modulation circuit GSG1 / GSG2 includes N mixers 132-1 and a frequency integrated multiplexer 133, and the functions of these components are the same as those of Figure 2A The functions of the corresponding components are the same. The frequency division modulation circuits GSG1 / GSG2 receive corresponding first control signals CQ11 to CQ1N and CQ21 to CQ2N, adjust the corresponding first control signals to different frequencies to generate N mixed signals, and integrate these mixed signals into one of the two divided signals CQG1 / CQG2.

[0040] Figure 5A The photoelectric demodulation circuit 140-2 includes a polarization multiplexer 144, two photodetectors 142-21 and 142-22, and two frequency division multiplexers ( Figure 5A Using frequency division multiplexer 143 as an example, polarization multiplexer 144 is coupled to optical fiber 150 and converts optical signal FLS into two differentiated optical signals DCQ1 and DCQ2 based on different polarization directions. Two optical detectors 142-21 and 142-22 each generate two electrical signals (here, using electrical signal TCQG1 as an example) based on the corresponding differentiated optical signals DCQ1 and DCQ2. Frequency division multiplexer 143 in circuit GQ1 splits one of the corresponding P electrical signals into N second control signals TCQ11 to TCQ1N based on different frequencies. Circuit GQ2, on the other hand, has the same circuit structure as circuit GQ1.

[0041] Figure 5B The modulation of each signal in this embodiment is demonstrated using specific signals. The upconverted signal CQG1 and the electrical signal TCQG1 are signals that integrate multiple control signals with different frequencies f1 to fn. Therefore, their electrical signal waveforms have multiple frequencies f1 to fn. The modulated optical signal PCQ1 and the differentiated optical signal DCQ1 generate corresponding waveforms at corresponding wavelengths due to the wavelength λ1 being separated by a distance (equal to the speed of light C divided by the frequency f1). The optical signal FLS is based on the modulated optical signal PCQ1 and also includes two waveforms of different polarity, with the polarity of the two waveforms differing by 90 degrees.

[0042] from Figure 5A and Figure 5B I know that Figure 5A The control signal transmission device 100 - 4 integrates a large number of control signals into an optical carrier using wavelength division multiplexing (WDM) and polarization multiplexing (Pol-Mux) technology, thereby obtaining control signals for controlling a large number of quantum bits in the low-temperature environment 105 .

[0043] Figures 6A to 6B 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 5 for a quantum computer according to a sixth embodiment of the present invention. Figure 2A The control signal transmission device 100-5 uses frequency division multiplexing (FDM) technology combined with wavelength division multiplexing (WDM) technology to integrate N times M control signals CQ11 to CQ1N, CQ21 to CQ2N...CQM1 to CQMN into the optical signal FLS of the optical fiber 150, where N and M are both positive integers. Part of the circuit of the control signal transmission device 100-5 is similar to the aforementioned Figure 2A and Figure 4A The circuit is similar, and the same component numbers are used for some components.

[0044] Figure 6A The electro-optical modulation circuit 130-5 includes M frequency division modulation circuits GSG1 through GSGM, an optical frequency comb generator 137, a first wavelength division multiplexer 138, M electro-optical modulators 134-31 through 134-3M, and a wavelength beam combiner 139. Each frequency division modulation circuit GSG1 through GSGM receives N of the first control signals CQ11 through CQMN to generate one of M frequency-divided signals (herein, frequency-divided signal CQG1 is used as an example). The optical frequency comb generator 137 converts light L1 into multi-wavelength light WL according to different wavelengths. The first wavelength division multiplexer 138 separates the multi-wavelength light WL into M specific wavelengths according to the different wavelengths. The M electro-optical modulators 134-31 to 134-3M receive the corresponding frequency-divided signals from the frequency-dividing modulation circuits GSG1 to GSGM, respectively, and integrate the corresponding frequency-divided signals into M specific wavelength lights corresponding to different wavelengths to generate M first demultiplexed optical signals (herein, the first demultiplexed optical signal PCQ1 is used as an example). The wavelength beam synthesizer 139 receives and integrates the first demultiplexed optical signals to generate the optical signal FLS. The frequency-dividing modulation circuits GSG1 to GSGM and Figure 6A The frequency division modulation circuit GSG1 in the embodiment is the same, and both include N mixers 132 - 1 and a frequency integration multiplexer 133 .

[0045] Figure 6A Optoelectronic demodulation circuit 140-5 includes a second wavelength division multiplexer 145, M photodetectors 142-31 to 142-3M, and M frequency division multiplexers (e.g., frequency division multiplexer 143 in circuit GQ1). Second wavelength division multiplexer 145 converts optical signal FLS into M second differentiated optical signals (herein, second differentiated optical signal DCQ1) based on different wavelengths. M photodetectors 142-31 to 142-3M each generate M electrical signals (herein, electrical signal TCQG1) based on the corresponding second differentiated optical signals. Frequency division multiplexer 143 splits one of the M electrical signals (e.g., electrical signal TCQG1) into N second control signals, such as second control signals TCQ11 to TCQ1N, based on different frequencies.

[0046] Figure 6B The modulation of each signal in this embodiment is illustrated using specific signals. The first control signal CQ11 and the second control signal TCQ11 are electrical signals with a frequency of f1. The frequency-divided signal CQG1 and the electrical signal TCQG1 are electrical signals that are the result of integrating multiple control signals with different frequencies f1 to fn. Therefore, their electrical signal waveforms have multiple frequencies f1 to fn. The average frequency of the frequency-divided signal CQG1 and the electrical signal TCQG1 is fGn. Figure 6B The multi-wavelength light WL shown is an optical signal exhibiting different waveforms at multiple different wavelengths λ1, λ2, ...λn. The wavelength spacing Δλ between these wavelengths λ1, λ2, ...λn is constant, meaning that the spacing Δλ between adjacent wavelengths is the same. Both the first demultiplexed optical signal PCQ1 and the second divided optical signal DCQ1 are optical signals with corresponding waveforms at wavelength λ'1, separated by a distance (equal to the speed of light C divided by the frequency f1) from wavelength λ1. The optical signal FLS has multiple wavelengths λ'1, λ'2, ...λ'n, and produces optical signals with corresponding waveforms at these wavelengths. These wavelengths λ'1, λ'2, ...λ'n are the values ​​of the corresponding wavelengths λ1, λ2, ...λn plus a distance (equal to the speed of light C divided by the frequency fGn).

[0047] from Figure 6A and Figure 6B I know that Figure 6A The control signal transmission device 100 - 5 integrates a large number of control signals into an optical carrier using frequency division multiplexing (FDM) and wavelength division multiplexing (WDM) technologies, thereby obtaining control signals for controlling a large number of quantum bits in the low-temperature environment 105 .

[0048] 7A to 7D 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 6 for a quantum computer according to a seventh embodiment of the present invention. Figure 7A The control signal transmission device 100-6 uses wavelength division multiplexing (WDM) technology combined with polarization multiplexing (Pol-Mux) technology to integrate M times P (P is 2) control signals CQ11 to CQ2M into the optical signal FLS of the optical fiber 150, where M and P are both positive integers. As mentioned above, due to the limitation of the number of polarizations of light, P is set to 2 in this embodiment. Part of the circuit of the control signal transmission device 100-6 is similar to the above-mentioned Figure 3A and Figure 4A The circuit is similar, and the same component numbers are used for some components.

[0049] Figure 7AThe electro-optical modulation circuit 130-6 includes two sets of mixers (one set of mixers is composed of mixers 134-31 to 134-3M), an optical frequency comb generator 137, an optical splitter 135, two wavelength division modulation circuits WT1 and WT2, and a polarization beamformer 136. Each set of mixers includes M mixers 134-31 to 134-3M. Each set of mixers receives M corresponding first control signals (e.g., first control signals CQ11 to CQ1M) and increases the frequency of the corresponding M first control signals to generate a set of upconverted signals CQ'1. Here, the set of upconverted signals CQ'1 includes M upconverted signals, and the two sets of mixers generate two sets of upconverted signals CQ'1 and CQ'2.

[0050] The functions of the optical frequency comb generator 137, the optical splitter 135 and the polarization beam synthesizer 136 are the same as those described above. Figure 2A The corresponding components function similarly. The two wavelength-demultiplexing modulation circuits WT1 and WT2 generate one of two modulated optical signals (using modulated optical signal PCQ'1 as an example) with different wavelengths based on the different wavelengths and the corresponding upconverted signals CQ'1 and CQ'2. These two modulated optical signals have different polarization directions. The polarization beamformer 136 receives and integrates the modulated optical signals to generate the optical signal FLS.

[0051] The circuit structures of the wave division modulation circuits WT1 and WT2 are the same. Figure 7B As shown, the wavelength division modulation circuit WT1 includes a first wavelength division multiplexer 138, M electro-optical modulators 134-31 to 134-3M, and a wavelength beam combiner 139. The first wavelength division multiplexer 138 separates the multi-wavelength light into M specific wavelength lights according to different wavelengths. The M electro-optical modulators 134-31 to 134-3M receive the corresponding group of upconverted signals from one of the two aforementioned mixer groups and integrate the corresponding group of upconverted signals into one of the M specific wavelength lights corresponding to different wavelengths to generate M demultiplexed optical signals (herein, demultiplexed optical signal PCQ1 is used as an example). The wavelength beam combiner 139 receives and integrates the M demultiplexed optical signals to generate one of P modulated optical signals.

[0052] Back to Figure 7A , Figure 7A Optoelectronic demodulation circuit 140-6 includes a polarization multiplexer 144 and two wavelength division demodulation circuits WRP1 and WRP2. Polarization multiplexer 144 converts optical signal FLS into two differentiated optical signals DCQ1 and DCQ2 based on the aforementioned different polarization directions. The two wavelength division demodulation circuits WRP1 and WRP2 generate a second control signal based on the two differentiated optical signals DCQ1 and DCQ2.

[0053] The circuit structures of the wave division demodulation circuits WRP1 and WRP2 are the same. Figure 7C As shown, the wavelength division demodulation circuit WRP1 includes a second wavelength division multiplexer 145 and M photodetectors 142-31 to 142-3M. The second wavelength division multiplexer 145 divides one of the corresponding P differentiated optical signals into M differentiated optical signals DCQ'1 to DCQ'M based on the aforementioned different wavelengths. The M photodetectors 142-31 to 142-3M generate M second control signals, such as second control signals TCQ1 to TCQM, based on the corresponding M differentiated optical signals DCQ'1 to DCQ'M, and provide these second control signals TCQ1 to TCQM to the qubits QB1 to QBM, respectively.

[0054] Figure 7D The modulation conditions of the signals in this embodiment are presented with specific signals. One of the up-converted signals CQ'1 and one of the second control signals TCQ1 are electrical signals with a frequency f1. Figure 7D The multi-wavelength light WL shown is an optical signal exhibiting different waveforms at multiple different wavelengths λ1, λ2, ..., λn. The wavelength spacing Δλ between these wavelengths λ1, λ2, ..., λn is constant. The demultiplexed optical signal PCQ1 and the differentiated optical signal DCQ'1 have wavelength λ'1 and generate optical signals with corresponding waveforms at wavelength λ'1. The wavelength λ'1 is the value obtained by adding a distance (the speed of light C divided by the frequency f1) to the corresponding wavelength λ1. The modulated optical signal PCQ'1 and the differentiated optical signal DCQ1 have multiple wavelengths λ'1, λ'2, ..., λ'n and generate optical signals with corresponding waveforms at these wavelengths λ'1, λ'2, ..., λ'n. These wavelengths λ'1, λ'2, ..., λ'n are the values ​​obtained by adding a distance (the speed of light C divided by the frequency f1) to the corresponding wavelengths λ1, λ2, ..., λn. The optical signal FLS is based on the modulated optical signal PCQ'1 and also includes two waveforms of different polarity, with the polarity of the two waveforms differing by 90 degrees.

[0055] from 7A to 7D I know that 7A to 7C The control signal transmission device 100 - 6 integrates a large number of control signals into an optical carrier using frequency division multiplexing (FDM) and polarization multiplexing (Pol-Mux) technology, thereby obtaining control signals for controlling a large number of quantum bits in the low-temperature environment 105 .

[0056] Figures 8A to 8F 1 is a circuit diagram and corresponding signal schematic diagram of a control signal transmission device 100 - 7 for a quantum computer according to an eighth embodiment of the present invention. Figure 8AControl signal transmission device 100-7 combines frequency division multiplexing (FDM), wavelength division multiplexing (WDM), and polarization multiplexing (Pol-Mux) technologies to integrate N times M times P (P is 2) control signals CQ111 to CQ1MN and CQ211 to CQ2MN into optical signal FLS of optical fiber 150, where M, N, and P are all positive integers. As previously mentioned, due to the limited number of polarizations of light, P is set to 2 in this embodiment. Some circuits of control signal transmission device 100-7 are similar to those of the aforementioned embodiments, and some components use the same component numbers as in the aforementioned embodiments.

[0057] Figure 8A The electro-optical modulation circuit 130-7 includes two sets of frequency-division modulation circuits (herein, a set of frequency-division modulation circuits GSG1 to GSGM is used as an example), an optical frequency comb generator 137, an optical splitter 135, two wavelength-division modulation circuits WTP1 and WTP2, and a polarization beam combiner 136. Each set of frequency-division modulation circuits includes M frequency-division modulation circuits GSG1 to GSGM. Each frequency-division modulation circuit GSG1 to GSGM receives N of the first control signals to generate one of M frequency-division signals. The two sets of frequency-division modulation circuits generate two sets of upconverted signals. Each frequency-division modulation circuit WTP1 and WTP2 receives the corresponding set of upconverted signals and one of the two secondary light beams SL1 and SL2, and generates one of two modulated optical signals having different wavelengths (herein, modulated optical signal PCQ'1 is used as an example) based on the different wavelengths and the corresponding set of upconverted signals. These two modulated optical signals have different polarization directions. The polarization beam combiner 136 receives and combines the aforementioned modulated optical signals to generate an optical signal FLS.

[0058] The frequency division modulation circuits GSG1 to GSGM have the same circuit structure. Figure 8B The frequency division modulation circuit GSG1 includes N mixers 132-1 and a frequency integration multiplexer 133. These mixers 132-1 are coupled to the digital-to-analog converter 120 to receive corresponding first control signals and adjust the corresponding first control signals to different frequencies to generate N mixed signals. The frequency integration multiplexer 133 integrates these mixed signals into one of M frequency-divided signals, with the frequency-divided signal CQG1 being used as an example.

[0059] The circuit structure of the wave splitting modulation circuit WTP1 is the same as that of WTP2. Figure 8CThe wavelength division modulation circuit WTP1 includes a first wavelength division multiplexer 138, M electro-optical modulators 134-31 to 134-3M, and a wavelength beam combiner 139. The first wavelength division multiplexer 138 divides the multi-wavelength light into M specific wavelength lights according to different wavelengths. The M electro-optical modulators 134-31 to 134-3M are respectively coupled to the first wavelength division multiplexer 138 and one of the two sets of frequency-frequency modulation circuits. They receive the corresponding group of upconverted signals from one of the two sets of frequency-frequency modulation circuits and integrate the corresponding group of upconverted signals into one of the M specific wavelength lights corresponding to different wavelengths to generate M demultiplexed optical signals, using the demultiplexed optical signal PCQ1 as an example. The wavelength beam combiner 139 receives and integrates the M demultiplexed optical signals to generate one of the two modulated optical signals.

[0060] Back to Figure 8A , Figure 8A Optical-to-electronic demodulation circuit 140-7 includes a polarization multiplexer 144 and two wavelength-division frequency-division demodulation circuits WRGQP1 and WRGQP2. Polarization multiplexer 144 converts optical signal FLS into two differentiated optical signals DCQ1 and DCQ2 based on different polarization directions. The two wavelength-division frequency-division demodulation circuits WRGQP1 and WRGQP2 generate second control signals based on the differentiated optical signals DCQ1 and DCQ2.

[0061] The circuit structure of the WRGQP1 and WRGQP2 wave division frequency division demodulation circuits is the same. For details, please refer to Figure 8D The wave division demodulation circuit WRGQP1 includes a second wave division multiplexer 145, M photodetectors 142-31 to 142-3M, and M frequency division multiplexers located in circuits GQ1 to GQM (shown in FIG. Figure 8E ). Figure 8D The second wavelength demultiplexer 145 separates one of the two separated optical signals into M separated optical signals DCQ'1 to DCQ'M according to the different wavelengths. The M optical detectors 142-31 to 142-3M generate M electrical signals TCQ1 to TCQM according to the M separated optical signals DCQ'1 to DCQ'M.

[0062] The circuit structures of circuits GQ1 to GQM are the same. For details, please refer to Figure 8E The circuit GQ1 includes a frequency division multiplexer 143. The frequency division multiplexer 143 divides one of the corresponding M electrical signals (eg, electrical signal TCQ1) into N second control signals according to different frequencies, such as Figure 8E The second control signals TCQ111 to TCQ11N in.

[0063] Figure 8FThe modulation of each signal in this embodiment is illustrated using specific signals. The first control signal CQ111 and the second control signal TCQ111 are electrical signals with a frequency f1. The electrical signals TCQ1 and TCQG1 are integrated signals that combine multiple control signals with different frequencies f1 to fn. Therefore, their electrical signal waveforms have multiple frequencies f1 to fn. The average frequency of the electrical signals TCQ1 and TCQG1 is fGn. Figure 8F The multi-wavelength light WL shown is an optical signal exhibiting different waveforms at multiple different wavelengths λ1, λ2, ..., λn. The wavelength spacing Δλ between these wavelengths λ1, λ2, ..., λn is constant. The demultiplexed optical signal PCQ1 and the differentiated optical signal DCQ'1 have wavelength λ'1 and generate optical signals with corresponding waveforms at these wavelengths λ'1. The wavelength λ'1 is the wavelength λ1 plus a distance (the speed of light C divided by the frequency fG1). The modulated optical signal PCQ'1 and the differentiated optical signal DCQ1 have wavelengths λ'1, λ'2, ..., λ'n and generate optical signals with corresponding waveforms at these wavelengths λ'1, λ'2, ..., λ'n. These wavelengths λ'1, λ'2, ..., λ'n are the wavelengths λ1, λ2, ..., λn plus a distance (the speed of light C divided by the frequency fGn). The optical signal FLS is based on the modulated optical signal PCQ'1 and also includes two waveforms of different polarity, with the polarity of the two waveforms differing by 90 degrees.

[0064] from Figures 8A to 8F I know that Figures 8A to 8E The control signal transmission device 100 - 7 uses frequency division multiplexing (FDM), wavelength division multiplexing (WDM) and polarization multiplexing (Pol-Mux) technologies to integrate a large number of control signals into the optical carrier, thereby obtaining control signals for controlling a large number of quantum bits in the low-temperature environment 105 .

[0065] In summary, the quantum computer and control signal transmission technology described in the embodiments of the present invention utilize various optical modulation technologies (e.g., frequency division multiplexing (FDM), wavelength division multiplexing (WDM), polarization multiplexing (Pol-Mux), and hybrids of these multiplexing technologies) to integrate a large number of control signals into a light carrier, which serves as the signal carrier. This technology uses a single optical fiber as the transmission line, thereby achieving a quantum computer control architecture that transmits signals that control a large number of quantum bits. This architecture reduces the introduction of heat energy into the cryogenic environment, facilitating thermal insulation in the cryogenic environment.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control signal transmission device for a quantum computer, characterized in that: include: A laser light source, providing light; A digital-to-analog converter provides a plurality of first control signals; an electro-optical modulation circuit, coupled to the digital-to-analog converter and the laser light source, and integrating the first control signal into the light to generate an optical signal; an optical fiber coupled to the electro-optical modulation circuit, wherein the electro-optical modulation circuit provides the optical signal to the optical fiber; An optoelectronic demodulation circuit is coupled to the optical fiber to convert and split the optical signal into a plurality of second control signals; as well as A plurality of quantum bits, coupled to the photoelectric demodulation circuit, The photoelectric demodulation circuit transmits the second control signal to the corresponding quantum bit, and the quantum bit is controlled by the corresponding second control signal. The ambient temperature set by the photoelectric demodulation circuit and the quantum bit is lower than a default temperature value.

2. The control signal transmission device according to claim 1, characterized in that: The electro-optical modulation circuit comprises: N mixers, coupled to the digital-to-analog converter to receive the corresponding first control signal, and adjust the corresponding first control signal to different frequencies to generate N mixed signals, where N is a positive integer; A frequency integration multiplexer coupled to the N mixers to integrate the mixed signals into an integrated signal; and The electro-optic modulator is coupled to the frequency integration multiplexer and the laser light source, and integrates the integrated signal into the light provided by the laser light source to generate the optical signal.

3. The control signal transmission device according to claim 2, characterized in that: The photoelectric demodulation circuit comprises: a light detector coupled to the optical fiber to convert the light signal into an electrical signal; and The frequency division multiplexer is coupled to the light detector and divides the electrical signal into the second control signals according to the different frequencies, wherein the number of the second control signals is N.

4. The control signal transmission device according to claim 1, characterized in that: The electro-optical modulation circuit comprises: P mixers, coupled to the digital-to-analog converter to receive the corresponding first control signal, and increase the frequency of the corresponding first control signal to generate P up-converted signals, where P is a positive integer; An optical splitter, coupled to the laser light source, to split the light into P sub-lights; P electro-optical modulators, coupled to the optical splitter and the mixer, receiving the corresponding up-converted signal from the corresponding mixer, and integrating the corresponding up-converted signal into the secondary light to generate P modulated optical signals with different polarization directions; and The polarization beam synthesizer is coupled to the electro-optical modulator, receives and integrates the modulated optical signal to generate the optical signal.

5. The control signal transmission device according to claim 4, characterized in that: The photoelectric demodulation circuit comprises: a polarization multiplexer coupled to the optical fiber, and converting the optical signal into P differentiated optical signals according to the different polarization directions; and P optical detectors are coupled to the polarization multiplexer and respectively generate the second control signals according to the corresponding differentiated optical signals, wherein the number of the second control signals is P.

6. The control signal transmission device according to claim 1, characterized in that: The electro-optical modulation circuit comprises: M mixers, coupled to the digital-to-analog converter to receive the corresponding first control signal and increase the frequency of the corresponding first control signal to generate M up-converted signals, where M is a positive integer; An optical frequency comb generator, coupled to the laser light source, generates multi-wavelength light according to different wavelengths of the light; A first wavelength division multiplexer, coupled to the optical frequency comb generator, for dividing the multi-wavelength light into M specific wavelength lights according to the different wavelengths; M electro-optical modulators, coupled to the first wavelength division multiplexer and the mixer, receiving the corresponding up-converted signals from the mixer, integrating the corresponding up-converted signals into the specific wavelength light corresponding to the different wavelengths to generate M first demultiplexed optical signals; and The wavelength beam synthesizer is coupled to the electro-optical modulator, and receives and integrates the first demultiplexed optical signal to generate the optical signal.

7. The control signal transmission device according to claim 6, characterized in that: The electro-optical modulation circuit comprises: A second wavelength division multiplexer coupled to the optical fiber, converting the optical signal into M second wavelength-divided optical signals according to the different wavelengths; and M optical detectors are coupled to the second wavelength division multiplexer and generate the second control signal according to the second wavelength-divided optical signal, wherein the number of the second control signals is M.

8. The control signal transmission device according to claim 1, characterized in that: The number of the first control signals is N times P, where N and P are positive integers. The electro-optical modulation circuit comprises: P frequency division modulation circuits, each frequency division modulation circuit receiving the N first control signals to generate one of the P frequency divided signals; An optical splitter, coupled to the laser light source, to split the light into P sub-lights; P electro-optical modulators, coupled to the optical splitter and the frequency division modulation circuit, receive the corresponding frequency-divided signals from the corresponding frequency division modulation circuit, and integrate the corresponding frequency-divided signals into the secondary light beam to generate P modulated optical signals with different polarization directions; and a polarization beam synthesizer, coupled to the electro-optical modulator, receiving and integrating the modulated optical signal to generate the optical signal, Each frequency division modulation circuit includes: N mixers, coupled to the digital-to-analog converter to receive the corresponding first control signal, and adjust the corresponding first control signal to different frequencies to generate N mixed signals; and The frequency integration multiplexer is coupled to the N mixers and integrates the mixed signal into one of the P divided frequency signals.

9. The control signal transmission device according to claim 8, characterized in that: The photoelectric demodulation circuit comprises: A polarization multiplexer coupled to the optical fiber, converting the optical signal into P differentiated optical signals according to the different polarization directions; P light detectors, coupled to the polarization multiplexer, respectively generate P electrical signals according to the corresponding differentiated optical signals; and P frequency division multiplexers are respectively coupled to the corresponding light detectors, and divide one of the corresponding P electrical signals into N of the second control signals according to the different frequencies.

10. The control signal transmission device according to claim 1, characterized in that: The number of the first control signals is N times M, where N and M are positive integers. The electro-optical modulation circuit comprises: M frequency division modulation circuits, each frequency division modulation circuit receiving N of the first control signals to generate one of the M frequency divided signals; An optical frequency comb generator, coupled to the laser light source, generates multi-wavelength light according to different wavelengths of the light; A first wavelength division multiplexer, coupled to the optical frequency comb generator, for dividing the multi-wavelength light into M specific wavelength lights according to the different wavelengths; M electro-optical modulators, coupled to the first wavelength division multiplexer and the frequency division modulation circuit, receive the corresponding frequency-divided signals from the frequency division modulation circuit, and integrate the corresponding frequency-divided signals into the M specific wavelength lights corresponding to the different wavelengths to generate M first demultiplexed optical signals; and a wavelength beam synthesizer, coupled to the electro-optical modulator, receiving and integrating the first demultiplexed optical signal to generate the optical signal, Each frequency division modulation circuit includes: N mixers, coupled to the digital-to-analog converter to receive the corresponding first control signal, and adjust the corresponding first control signal to different frequencies to generate N mixed signals; and The frequency integration multiplexer is coupled to the N mixers and integrates the mixed signal into one of the M divided frequency signals.

11. The control signal transmission device according to claim 10, characterized in that: The photoelectric demodulation circuit comprises: A second wavelength division multiplexer coupled to the optical fiber, converting the optical signal into M second differentiated optical signals according to the different wavelengths; M optical detectors, coupled to the second wavelength division multiplexer, respectively generating M electrical signals according to the corresponding second divided optical signals; and M frequency division multiplexers are respectively coupled to the corresponding light detectors, wherein each frequency division multiplexer divides one of the corresponding M electrical signals into N of the second control signals according to the different frequencies.

12. The control signal transmission device according to claim 1, characterized in that: The number of the first control signals is M times P, where M and P are positive integers. The electro-optical modulation circuit comprises: P groups of mixers are coupled to the digital-to-analog converter, each group of mixers includes M mixers, each group of mixers receives the corresponding M first control signals, and increases the frequency of the corresponding M first control signals to generate a group of up-converted signals, the group of up-converted signals includes M up-converted signals, and the P groups of mixers generate P groups of up-converted signals; An optical frequency comb generator, coupled to the laser light source, generates multi-wavelength light according to different wavelengths of the light; an optical splitter, coupled to the optical frequency comb generator, to split the multi-wavelength light into P sub-lights; P wavelength division modulation circuits are coupled to the optical splitter, each of which receives the corresponding group of up-converted signals and one of the P secondary light beams, and generates one of the P modulated optical signals having the different wavelengths according to the different wavelengths and the corresponding group of up-converted signals, wherein the P modulated optical signals respectively have different polarization directions; and a polarization beam synthesizer, coupled to the P wave division modulation circuits, receiving and integrating the modulated optical signals to generate the optical signals, Each wave division modulation circuit includes: A first wavelength division multiplexer, coupled to the optical splitter, for dividing the multi-wavelength light into M specific wavelength lights according to the different wavelengths; M electro-optical modulators, coupled to the first wavelength division multiplexer and a corresponding one of the P mixers, receive the corresponding group of up-converted signals from one of the P groups of mixers, and integrate the corresponding group of up-converted signals into one of the M specific wavelength lights corresponding to the different wavelengths to generate M demultiplexed optical signals; and The wavelength beam synthesizer is coupled to the M electro-optical modulators, receives and integrates the M demultiplexed optical signals to generate one of the P modulated optical signals.

13. The control signal transmission device according to claim 12, characterized in that: The photoelectric demodulation circuit comprises: a polarization multiplexer coupled to the optical fiber, and converting the optical signal into P differentiated optical signals according to the different polarization directions; and P wavelength division demodulation circuits are coupled to the polarization multiplexer and generate the second control signal according to the P differentiated optical signals. Each wave division demodulation circuit includes: a second wavelength division multiplexer coupled to the polarization multiplexer, for dividing one of the corresponding P differentiated optical signals into M differentiated optical signals according to the different wavelengths; and M optical detectors are coupled to the second wavelength division multiplexer and respectively generate M of the second control signals according to the corresponding M differentiated optical signals.

14. The control signal transmission device according to claim 1, characterized in that: The number of the first control signals is N times M times P, where N, M and P are positive integers. The electro-optical modulation circuit comprises: P groups of frequency-division modulation circuits are coupled to the digital-to-analog converter, each group of frequency-division modulation circuits includes M frequency-division modulation circuits, each frequency-division modulation circuit receives N of the first control signals to generate one of the M frequency-divided signals, and the P groups of frequency-division modulation circuits generate P groups of up-converted signals; An optical frequency comb generator, coupled to the laser light source, generates multi-wavelength light according to different wavelengths of the light; an optical splitter, coupled to the optical frequency comb generator, to split the multi-wavelength light into P sub-lights; P wavelength division modulation circuits are coupled to the optical splitter, each of which receives the corresponding group of up-converted signals and one of the P secondary light beams, and generates one of the P modulated optical signals having the different wavelengths according to the different wavelengths and the corresponding group of up-converted signals, wherein the P modulated optical signals respectively have different polarization directions; and a polarization beam synthesizer, coupled to the P wave division modulation circuits, receiving and integrating the modulated optical signals to generate the optical signals, Each frequency division modulation circuit includes: N mixers, coupled to the digital-to-analog converter to receive the corresponding first control signal, and adjust the corresponding first control signal to different frequencies to generate N mixed signals; and A frequency integration multiplexer coupled to the N mixers to integrate the mixed signal into one of the M divided signals, Each wave division modulation circuit includes: A first wavelength division multiplexer, coupled to the optical splitter, for dividing the multi-wavelength light into M specific wavelength lights according to the different wavelengths; M electro-optical modulators, coupled to the first wavelength division multiplexer and a corresponding one of the P groups of frequency-split modulation circuits, receive the corresponding group of up-converted signals from the one of the P groups of frequency-split modulation circuits, and integrate the corresponding group of up-converted signals into one of the M specific wavelength lights corresponding to the different wavelengths to generate M demultiplexed optical signals; and The wavelength beam synthesizer is coupled to the M electro-optical modulators, receives and integrates the M demultiplexed optical signals to generate one of the P modulated optical signals.

15. The control signal transmission device according to claim 14, characterized in that: The photoelectric demodulation circuit comprises: A polarization multiplexer coupled to the optical fiber, converting the optical signal into P differentiated optical signals according to the different polarization directions; P wavelength division frequency division demodulation circuits are coupled to the polarization multiplexer to generate the second control signal according to the P differentiated optical signals. Each wave division demodulation circuit includes: A second wavelength division multiplexer, coupled to the polarization multiplexer, divides one of the corresponding P differentiated optical signals into M differentiated optical signals according to the different wavelengths; M optical detectors, coupled to the second wavelength division multiplexer, respectively generate M electrical signals according to the corresponding M differentiated optical signals; and M frequency division multiplexers are respectively coupled to the corresponding light detectors, wherein each frequency division multiplexer divides one of the corresponding M electrical signals into N of the second control signals according to the different frequencies.

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