Ultrahigh-speed laser transmission system and CT detection equipment

Abstract

The invention relates to the technical field of medical imaging, and provides an ultra-high-speed laser transmission system and CT detection equipment. A photoelectric emission system is suitable for emitting at least two optical signals with different wavelengths; the optical array assembly comprises an even number of transmitting lenses and receiving lenses, the transmitting lenses are connected with the photoelectric transmitting system, the transmitting lenses are arranged on the rotor structure along a circumferential array, and the wavelengths of optical signals passing through two adjacent transmitting lenses are different; the receiving lens is arranged on the stator structure, the view field range of the receiving lens covers the emergent areas of the at least two transmitting lenses, and the receiving lens is used for receiving the space light beams transmitted by the two adjacent transmitting lenses into a single optical fiber for transmission; the photoelectric receiving system is connected with the receiving lens, and the photoelectric receiving system is used for separating the signals with different wavelengths for corresponding signal processing; and the signal synchronous processing system is used for carrying out synchronous processing on the received optical signals. The system provided by the invention is relatively simple in setting, convenient to install, and capable of optimizing bandwidth and improving transmission efficiency.

Description

Technical Field

[0001] The present invention relates to the field of medical imaging technology, and in particular to an ultra-high-speed laser transmission system and CT detection equipment. Background Art

[0002] CT (Computed Tomography) is a medical imaging technique that uses precise X-ray beams and highly sensitive detectors to scan the object layer by layer. The data obtained by the scan is processed by a computer to generate high-resolution images of the internal cross-section, coronal or sagittal plane of the object.

[0003] In order to improve the data transmission rate of the CT system, a Chinese patent application with publication number CN101006925A discloses a CT slip ring system based on optical fiber data transmission, which specifically discloses the following contents: when the rotating part performs rotation scanning, the laser diode and the corresponding focusing lens rotate accordingly. In order to receive the light beam focused by the focusing lens, the stationary part of the CT system is provided with an optical fiber bundle of a limited length in the circumferential direction around the rotating part. The optical fiber bundle transmits the received optical signal to an optical / electrical conversion system, such as an optical fiber sensor, which converts the optical signal into an electrical signal, and then transmits the electrical signal to the image reconstruction system of the CT system for image reconstruction.

[0004] Although the above scheme can improve the data transmission rate of the CT system to a certain extent, since the above scheme arranges a plurality of focusing lenses on the rotating part, and the receiving side uses a beam array for receiving, the light of each received beam is weak, and so many beam arrays receive the same beam signal, so the above scheme has the following defects: (1) Multiple photoelectric conversion systems are used for reception. Two photoelectric conversion systems receive signals at the same time and need to process the same signals. Since there is an optical path difference between the two signals, the two received signals have different delays. Whether selecting the optical path signal or strictly controlling the optical path difference between the two signals, the signal processing process is very complicated, which will affect the communication rate improvement.

[0005] (2) The use of fiber beam arrays will result in the power of the received signal being received by multiple receivers. The energy of a single beam is low and cannot support the low sensitivity requirements under ultra-high speed conditions. At the same time, the use of multiple receivers in the beam array will result in the need for a large number of receiving systems, making the system setup more complicated. Summary of the invention

[0006] The first aspect of the present invention provides an ultra-high-speed laser transmission system to solve the above-mentioned defects in the prior art. The system configuration is relatively simple and easy to install. The signal processing process is not affected by the rate increase and can optimize the bandwidth to reduce network congestion and delay and improve transmission efficiency.

[0007] A second aspect of the present invention provides a CT detection device.

[0008] A first aspect of the present invention provides an ultra-high-speed laser transmission system, comprising an optoelectronic transmitting system, an optical transmitting array, an optoelectronic receiving system and a signal synchronization processing system.

[0009] The optoelectronic transmitting system is adapted to transmit optical signals of at least two different wavelengths; The optical array assembly includes an even number of transmitting lenses and receiving lenses, wherein the even number of transmitting lenses are connected to the photoelectric transmitting system, and the even number of transmitting lenses are arranged on the rotor structure along a circumferential array, and the wavelengths of the optical signals passing through two adjacent transmitting lenses are different; the receiving lens is arranged on the stator structure, and the field of view of the receiving lens covers at least two exit areas of the transmitting lenses, and is used to receive the spatial light beams emitted by the two adjacent transmitting lenses into a single optical fiber for transmission; The photoelectric receiving system is connected to the receiving lens, and is used to separate signals of different wavelengths for corresponding signal processing; the signal synchronization processing system is used to synchronously process the received optical signals.

[0010] According to the ultra-high-speed laser transmission system provided by the present invention, the photoelectric emission system includes at least two photoelectric emission components and a wavelength division multiplexer, and the emission light of each photoelectric emission component is suitable for passing through the wavelength division multiplexer to enter the optical array component, and the wavelength division multiplexer is used to couple optical signals of different wavelengths on an optical fiber for simultaneous transmission to increase the available bandwidth of the optical fiber.

[0011] According to the ultra-high-speed laser transmission system provided by the present invention, the wavelength division multiplexer includes a wavelength combining unit and a wavelength demultiplexing unit. The wavelength combining unit is located at the transmitting end of the wavelength division multiplexer and is used to combine multiple optical signals with different wavelengths at the transmitting end and couple them into the same optical fiber for transmission; the wavelength demultiplexing unit is located at the receiving end of the wavelength division multiplexer and is used to separate the optical signals of each wavelength.

[0012] The ultra-high-speed laser transmission system provided by the present invention further includes an optical amplifier, which is located between the wave combining unit and the wave splitting unit and is used to amplify the energy of the optical signal.

[0013] According to the ultra-high-speed laser transmission system provided by the present invention, the optical amplifier comprises an optical fiber amplifier.

[0014] According to the ultra-high-speed laser transmission system provided by the present invention, the photoelectric receiving system includes a wave splitter and at least two photoelectric receiving components; The wavelength splitter is used to separate optical signals of different wavelengths, and the optoelectronic receiving component is connected to the wavelength splitter to perform corresponding processing on each separated optical signal.

[0015] According to the ultra-high-speed laser transmission system provided by the present invention, the signal synchronization processing system includes a frame positioning structure and a frame counting structure, the frame positioning structure is used to perform frame positioning on the signal, and the frame counting structure is used to extract the value of the frame count.

[0016] A second aspect of the present invention provides a CT detection device, comprising a device body and an ultra-high-speed laser transmission system as described above, wherein the ultra-high-speed laser transmission system is arranged in the device body.

[0017] The ultra-high-speed laser transmission system provided by the present invention deploys at least two optical signals of different wavelengths at the transmitting end, so that the two signals emitted in a single optical fiber are signals of two wavelengths, and the at least two optical signals of different wavelengths are respectively connected to different transmitting lenses of the optical array component. The receiving end of the optical array component uses a receiving lens to receive the spatial light beams emitted by two adjacent transmitting lenses into a single optical fiber for transmission, which can reduce the difficulty and cost of the ultra-high-speed laser transmission system. The transmitted optical signal is synchronously processed by the optoelectronic receiving system and the signal synchronization processing system, which can not only simplify the complexity of the entire ultra-high-speed laser transmission system, but also increase the transmission rate from hundreds of Gbps to Tbps. The system setting is relatively simple and easy to install. It is not affected by the rate increase during the signal processing process, and can optimize the bandwidth to reduce network congestion and delay and improve transmission efficiency.

[0018] The CT detection device provided by the present invention belongs to the same inventive concept as the ultra-high-speed laser transmission system provided by the present invention, and therefore, the CT detection device provided by the present invention at least has all the advantages of the ultra-high-speed laser transmission system provided by the present invention. In addition, since the CT detection device provided by the present invention includes the ultra-high-speed laser transmission system, it can have the beneficial effects of stable data communication, high transmission efficiency, and low bit error rate when the CT detection device is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1It is a schematic diagram of the structure of an ultra-high-speed laser transmission system provided by an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of an optical array assembly provided in an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the optical path of the optical fiber amplifier provided in an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of an optoelectronic transmitting and receiving system provided by an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the effect of path delay on the received signal using an optical signal of the same wavelength.

[0025] Figure 6 This is a schematic diagram of the effect of path delay on received signals using optical signals of different wavelengths.

[0026] Figure 7 It is a structural diagram of a signal synchronization processing system provided by an embodiment of the present invention.

[0027] Reference numerals: 10. Photoelectric transmitting system; 20. Optical array assembly; 21. Stator structure; 211. Receiving lens; 22. Rotor structure; 221. Transmitting lens; 30. Photoelectric receiving system; 40. Signal synchronization processing system. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0030] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] Figure 1 It is a schematic diagram of the structure of an ultra-high-speed laser transmission system provided by an embodiment of the present invention. Figure 2 It is a schematic diagram of the structure of an optical array assembly provided in an embodiment of the present invention.

[0033] See also Figure 1 and Figure 2 An embodiment of the present invention provides an ultra-high-speed laser transmission system, which is mainly used for CT monitoring equipment. Of course, the ultra-high-speed laser transmission system can also be used in other fields, such as video streaming media, big data cloud computing, etc.

[0034] The ultra-high-speed laser transmission system includes an optoelectronic transmitting system 10 , an optical array assembly 20 , an optoelectronic receiving system 30 and a signal synchronization processing system 40 .

[0035] Among them, the optoelectronic transmission system 10 can transmit at least two optical signals of different wavelengths, that is, the optoelectronic transmission system 10 can transmit at least two optical signals of different wavelengths, and can also transmit three optical signals of different wavelengths as needed. The transmission signals of at least two optical signals of different wavelengths are consistent. The embodiment of the present invention is described by taking the optoelectronic transmission system 10 transmitting two optical signals of different wavelengths as an example, and the optoelectronic transmission system 10 is also used to demultiplex the amplified optical signal and then connect it to the optical array component 20.

[0036] The optical array assembly 20 is connected to the photoelectric transmitting system 10. The optical array assembly 20 includes an even number of transmitting lenses 221 and a receiving lens 211. The even number of transmitting lenses 221 are arranged on the rotor structure 22 along a circumferential array. The transmitting lens 221 is a collimating lens, which is used to collimate the light entering the spectrometer, and the wavelengths of the light signals passing through two adjacent transmitting lenses 221 are different. The receiving lens 211 is arranged on the stator structure 21. The receiving range of the receiving lens 211 covers the exit area of ​​at least two transmitting lenses 221, and is used to receive the spatial light beams emitted by two adjacent transmitting lenses 221 into a single optical fiber for transmission. The receiving lens 211 can be set to a single or multiple. Among them, the rotor structure 22 rotates relative to the stator structure 21. The rotor structure 22 is set on a slip ring, and the rotor structure 22 is powered by the slip ring.

[0037] The photoelectric receiving system 30 is connected to the receiving lens 211 and is used to separate the received optical signals of different wavelengths for corresponding signal processing. The signal synchronization processing system 40 is used to perform synchronization processing on the received optical signals.

[0038] It can be understood that the ultra-high-speed laser transmission system provided by the embodiment of the present invention, by deploying at least two optical signals of different wavelengths at the transmitting end, makes the two signals emitted in a single optical fiber are signals of two wavelengths, and respectively connects the at least two optical signals of different wavelengths to different transmitting lenses 221 of the optical array assembly 20, and the receiving end of the optical array assembly 20 uses a receiving lens 211 to receive the spatial light beams emitted by two adjacent transmitting lenses 221 into a single optical fiber for transmission, which can reduce the difficulty and cost of the ultra-high-speed laser transmission system. The transmitted optical signal is synchronously processed by the optoelectronic receiving system 30 and the signal synchronization processing system 40, which can not only simplify the complexity of the entire ultra-high-speed laser transmission system, but also increase the transmission rate from hundreds of Gbps to Tbps. The overall system setting is relatively simple and easy to install. The signal processing process is not affected by the rate increase, and the bandwidth can be optimized to reduce network congestion and delay and improve transmission efficiency.

[0039] Continue reading Figure 1 In some embodiments of the present invention, the optoelectronic transmission system 10 includes at least two optoelectronic transmission components and a wavelength division multiplexer, and the optoelectronic transmission component is a transmitter. The optical signal emitted by each optoelectronic transmission component is suitable for entering the optical array component 20 after passing through the wavelength division multiplexer. The wavelength division multiplexer is used to couple multiple optical signals of different wavelengths on an optical fiber for simultaneous transmission to increase the available bandwidth of the optical fiber.

[0040] Among them, in the ultra-high-speed laser transmission system, a wavelength division multiplexer is installed in the optical fiber between the transmitting end and the receiving end, and is used to combine optical signals of different wavelengths sent by at least two optoelectronic transmitting components into a wavelength-multiplexed optical signal, which is transmitted through a single optical fiber, and then a wavelength division multiplexer is used at the receiving end to separate the optical signals and send them to the optical array component 20 respectively.

[0041] For example, two optoelectronic transmitting components are respectively recorded as optoelectronic transmitting component 1 and optoelectronic transmitting component 2. Optoelectronic transmitting component 1 sends out an optical signal with a wavelength of λ1, and optoelectronic transmitting component 2 sends out an optical signal with a wavelength of λ2. The optical signal λ1 and the optical signal λ2 are transmitted to the optical array component 20 through a wavelength division multiplexer. A single receiving lens 211 is used to receive the spatial light beams emitted by two adjacent transmitting lenses 221 into a single optical fiber. By using two wavelength intervals for deployment at the transmitting end, the two signals received in the single optical fiber are signals of two wavelengths, and the two optical signals of different wavelengths are respectively connected to different optoelectronic receiving systems 30, and then synchronously processed by the signal synchronization processing system 40. The processing process is not affected by the rate increase, and can optimize the bandwidth to reduce network congestion and delay, and improve the signal transmission efficiency.

[0042] Continue reading Figure 1 In some embodiments of the present invention, the wavelength division multiplexer includes a wavelength combining unit and a wavelength splitting unit. The wavelength combining unit is located at the transmitting end of the wavelength division multiplexer and is used to combine multiple optical signals with different wavelengths (carrying various information) at the transmitting end through a multiplexer (also called a wavelength combiner) and couple them to the same optical fiber of the optical line for transmission. The wavelength splitting unit is located at the receiving end of the wavelength division multiplexer and is used to separate optical signals of various wavelengths through a demultiplexer (also called a wavelength splitter or a demultiplexer).

[0043] The separated optical signal λ1 and optical signal λ2 are connected to the optical array component 20, and the spatial light beams emitted by the two adjacent transmitting lenses 221 are received into a single optical fiber through a single receiving lens 211 on the stator structure 21 of the optical array component 20. The two signals received in the single optical fiber are signals of two wavelengths, and the two optical signals of different wavelengths are separated by a demultiplexer and respectively connected to different optoelectronic receiving systems 30 to restore the original signals, and then synchronously processed by the signal synchronization processing system 40. This processing process is not affected by the rate increase, and can optimize the bandwidth to reduce network congestion and delay, and improve signal processing efficiency.

[0044] Continue reading Figure 1In some embodiments of the present invention, the ultra-high-speed laser transmission system further includes an optical amplifier, which is located between the wave combining unit and the wave splitting unit, and realizes amplification by converting the energy of the pump light into the energy of the optical signal based on the stimulated radiation of the laser, thereby enhancing the intensity of the optical signal to improve the transmission distance and quality of the signal.

[0045] Among them, optical amplifiers include semiconductor amplifiers and fiber amplifiers. Semiconductor amplifiers are divided into resonant type and traveling wave type. Fiber amplifiers are divided into rare earth element doped fiber amplifiers and nonlinear optical amplifiers.

[0046] The embodiment of the present invention is described by taking a rare earth element doped fiber amplifier as an example, that is, rare earth ions (such as erbium, praseodymium, thulium, etc.) are doped in the optical fiber as laser active substances. The gain bandwidth of each dopant is different. The gain band of the erbium-doped fiber amplifier is relatively wide, covering the S, C, and L bands; the gain band of the thulium-doped fiber amplifier is the S band; the gain band of the praseodymium-doped fiber amplifier is around 1310nm.

[0047] Figure 3 It is a schematic diagram of the optical path of the optical fiber amplifier provided in an embodiment of the present invention.

[0048] See also Figure 3 ,Fiber amplifiers are used to amplify low-power output optical signals into high-power output optical signals to support attenuation over longer distances, ensuring that the received signal at the receiving end is within an acceptable range, with an output power of up to xW and a noise figure of less than 5dB.

[0049] The output power of a single-stage erbium-doped fiber amplifier reaches 22dBm, which is close to the limit, and it can still maintain a low noise figure. Therefore, the optical path design of the high-power optical amplifier adopts a two-stage cascade amplification optical path structure, such as Figure 3 The first stage of amplification is called pre-amplification, which uses 976nm single-mode pumped erbium-doped fiber for amplification, initially boosts the power of the input signal, and controls the noise figure below 4.5dB; the second stage of amplification uses double-clad amplification technology, both using 940nm multi-mode pump as the excitation source, double-clad erbium-ytterbium co-doped fiber as the gain medium, and uses reverse pumping in structure to improve the pump conversion efficiency.

[0050] It should be noted that in the design of the two-stage amplification optical path structure, in addition to considering the conversion efficiency of the amplification optical path, power consumption and reliability also need to be considered.

[0051] Continue reading Figure 1The photoelectric receiving system 30 includes a wave splitter and at least two photoelectric receiving components, and the photoelectric receiving component is a receiver. The wave splitter is used to split the optical signal received by the single receiving lens 211 to restore the optical signal λ1 and the optical signal λ2. The optical signal λ1 enters the corresponding photoelectric receiving component 1 for signal processing, and the optical signal λ2 enters the corresponding photoelectric receiving component 2 for signal processing.

[0052] Among them, the receiving lens 211 of the optical array assembly 20 is equivalent to a combiner, and constitutes a wavelength division multiplexing system with the wavelength splitter of the optoelectronic receiving system 30. That is, the ultra-high-speed laser transmission system provided in the embodiment of the present invention adopts a multi-level wavelength division multiplexing system to increase the available bandwidth of the optical fiber and improve the transmission rate of the signal.

[0053] Continue reading Figure 1 and Figure 2 An even number of transmitting lenses 221 are arranged along a circumferential array on the rotor structure 22, that is, an even number of transmitting lenses 221 are evenly distributed on the rotor structure 22, and the wavelengths of optical signals transmitted by two adjacent transmitting lenses 221 are different, but the transmitted optical signals are consistent.

[0054] For example, transmitting lenses 221 such as A1, A2, A3, A4, A5, An are fixed at intervals on the rotor structure 22, and B1 is a receiving lens 211 fixedly arranged on the stator structure 21. The field of view angle of the receiving lens 211 is related to the positional relationship between two adjacent transmitting lenses 221. The structural parameters of the receiving lens 211 can be determined according to the positions of the two adjacent transmitting lenses 221 so that the field of view angle of the receiving lens 211 covers the light emitting areas of the two adjacent transmitting lenses 221, so that the light signals emitted by the two adjacent transmitting lenses 221 can be received at the same time anyway.

[0055] The optical signal amplified by the optical fiber amplifier in the wavelength division multiplexer is divided into two optical signals of λ1 and λ2 by the demultiplexer. Among them, the optical signal with a wavelength of λ1 enters the transmitting lenses A1 and A3 respectively after being split by the two-in-one optical fiber, and the optical signal with a wavelength of λ2 enters the transmitting lens A2. The three optical signals are collimated by the transmitting lens A1, the transmitting lens A2 and the transmitting lens A3 respectively and then emitted in the radial direction of the rotor structure 22. The receiving field of view of the receiving lens B1 spreads along the radial direction of the rotor, completely covering the emission range from the transmitting lens A1 to the transmitting lens A3. During the rotation of the rotor structure 22, the receiving lens B1 receives the optical signal of the combined beam of λ1 and λ2 collimated by the transmitting lens A1 to the transmitting lens A3, couples into a single optical fiber through the receiving lens B1, and is transmitted by the single optical fiber into the demultiplexer (i.e., the demultiplexer) for demultiplexing. Then, the demultiplexed optical signal λ1 enters the photoelectric receiving component 1 for processing, and the demultiplexed optical signal λ2 enters the photoelectric receiving component 2 for processing. After processing, it is sent to the signal synchronization processing system 40 for synchronization processing.

[0056] Figure 4 Schematic diagram of an optoelectronic transmitting and receiving system provided by an embodiment of the present invention.

[0057] See also Figure 4 TX is the electrical signal input to the transmitter of the ultra-high-speed laser transmission system. After the CDR (clock and data recovery) recovers the clock of the signal and regenerates it, it is output to the LDDRIVER (laser driver) to amplify the small signal into a large signal. The laser driver modulates the electrical signal onto the optical signal. The TOSA (optical transmitter submodule) sends out the optical signal.

[0058] ROSA (optical receiving assembly) converts the received optical signal into an electrical signal through PIN, which is amplified by TIA (transimpedance amplifier), and then CDR performs clock and data recovery. After the data is regenerated and recovered, it is sent to RX.

[0059] Among them, TEC is a semiconductor cooler, a controller used to control the temperature of the laser core, APC is a laser automatic power control circuit. MCU is a micro control unit, also known as a single-chip microcomputer or single-chip microcomputer, which is mainly used to connect with the interface for corresponding control processing.

[0060] Figure 5 This is a schematic diagram of the effect of path delay on the received signal using an optical signal of the same wavelength. Figure 6 This is a schematic diagram of the effect of path delay on received signals using optical signals of different wavelengths.

[0061] See also Figure 5 and Figure 6 The ultra-high-speed laser transmission system provided by the embodiment of the present invention illustrates the problem of signal interference by comparing the influence of the path delay of optical signals of the same wavelength on the received signal and the influence of the path delay of optical signals of different wavelengths on the received signal.

[0062] Specific reference Figure 5 Since an even number of transmitting lenses 221 need to be distributed on the rotor structure 22, the signal of each transmitting lens 221 is transmitted through optical fiber. Therefore, each transmitting lens 221 corresponds to one optical fiber, and the lengths of each optical fiber are unequal. During the transmission process of the ultra-high-speed laser transmission system, optical fibers of unequal lengths will cause signal transmission delays, so that when the receiver end enters the same optical fiber, the signals will interfere with each other, which may easily lead to signal reception failure.

[0063] Depend on Figure 6It can be seen that the ultra-high-speed laser transmission system provided by the embodiment of the present invention adopts a wavelength division multiplexing system. When two wavelength optical signals, namely, optical signal λ1 and optical signal λ2, enter the receiver at the same time through different paths, the two signals with different delays can be demultiplexed through a wavelength division multiplexer, and there is no mutual interference problem between the two signals.

[0064] Figure 7 4 is a schematic diagram of the structure of a signal synchronization processing system 40 provided in an embodiment of the present invention.

[0065] See also Figure 7 The signal synchronization processing system 40 includes a frame alignment structure and a frame count structure. The frame alignment structure is used to perform frame alignment on the signal, and the frame count structure is used to extract the value of the frame count.

[0066] Since the baseband signals of the optical signals of two different wavelengths in the ultra-high-speed laser transmission system provided by the embodiment of the present invention are completely consistent, during optical reception, the emitted optical signal rotates with the rotor structure 22, and there is a situation where one optical signal or two optical signals are received at the same time. As the rotation of the rotor structure 22 changes, the path of the optical signal received first will slowly rotate out of the field of view of the receiving lens 211, and the newly connected optical signal will change from weak to strong. It is necessary to synchronize and judge the received signals so that a complete signal can be combined from the two received signals without interrupting the signal transmission, and then transmitted to the back-end for processing.

[0067] like Figure 7 As shown, the two optical signals have the same frame header signal, and the synchronization frame headers can be processed in parallel. When the signals are synchronized, the order of the two signals can be determined first, and then the channel quality information of the two signals, such as the signal-to-noise ratio, can be used to determine whether the quality of the first-arriving signal supports the output reception. If the signal quality of the first-arriving signal is below the judgment threshold, that is, the signal quality of the first-arriving signal is less than the signal threshold, it is necessary to switch to the later-entering optical path signal for reception. In order to prevent data leakage and repeated reception, after the received data signal is synchronized, it is determined whether the received frame is repeated or omitted based on the count in the data frame.

[0068] Frame positioning is a fixed series of digital numbers with strong autocorrelation. Frame positioning can be performed, and MFAS is used as a frame count. After frame positioning is completed, the value of the frame count can be extracted to determine which frame is currently being received, which is convenient for the two parallel receiving channels to determine whether the received frames are repeated or missed, so as to ensure the formation of a complete transmission sequence and realize signal synchronization processing.

[0069] In the ultra-high-speed laser transmission system provided by the embodiment of the present invention, the optoelectronic transmitting component adopts multiple transmitters to transmit signals of different wavelengths, and converts the collected signals into high-speed optical signals and sends them to the optical signal amplification part, and divides the amplified optical signals into optical signals of different wavelengths through the wavelength division multiplexing system. The optical signals of different wavelengths are respectively connected to the optical array component. After the spatial light beam is received by the optical receiving lens 211, it enters the splitter to decompose the two optical signals of different wavelengths, and respectively connects them to different optoelectronic receiving components for processing. The signal synchronization processing system 40 then performs synchronous processing on the two received signals, and the final data is sent to the subsequent processing part.

[0070] The ultra-high-speed laser transmission system provided by the embodiment of the present invention amplifies the optical signal by setting an optical fiber amplifier so that the optical signal can support a longer transmission distance. A wavelength division multiplexing system is also adopted to enable multiple wavelengths to transmit the same information at the same time, ensuring that the signal is reliably received at the receiving end, so as to overcome the problem of optical path difference in multi-channel transmission. There is no need to perform optical path calibration, and installation is convenient. In addition, the receiving side of the optical array assembly 20 adopts a receiving lens 211, which can reduce the difficulty and cost of the ultra-high-speed laser transmission system. Finally, signal synchronization processing technology is used to simplify the complexity of the entire ultra-high-speed laser transmission system, and the transmission rate is increased from hundreds of Gbps to Tbps without changing the original structure of the system too much.

[0071] An embodiment of the present invention further provides a CT detection device, comprising a device body and any one of the ultra-high-speed laser transmission systems, wherein the ultra-high-speed laser transmission system is arranged in the device body.

[0072] The CT detection device provided by the present invention belongs to the same inventive concept as the ultra-high-speed laser transmission system provided by the present invention, and therefore, the CT detection device provided by the present invention at least has all the advantages of the ultra-high-speed laser transmission system provided by the present invention. In addition, since the CT detection device provided by the present invention includes the ultra-high-speed laser transmission system, it can have the beneficial effects of stable data communication, high transmission efficiency, and low bit error rate when the CT detection device is running.

[0073] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultra-high-speed laser transmission system, characterized in that: include: An optoelectronic transmitting system adapted to transmit optical signals of at least two different wavelengths; An optical array assembly, comprising an even number of transmitting lenses and receiving lenses, wherein the even number of transmitting lenses are connected to the photoelectric transmitting system, and the even number of transmitting lenses are arranged in a circumferential array on the rotor structure, and the wavelengths of the optical signals passing through two adjacent transmitting lenses are different; the receiving lens is arranged on the stator structure, and the field of view of the receiving lens covers at least two exit areas of the transmitting lenses, and is used to receive the spatial light beams emitted by the two adjacent transmitting lenses into a single optical fiber for transmission; A photoelectric receiving system connected to the receiving lens, the photoelectric receiving system is used to separate signals of different wavelengths to perform corresponding signal processing; The signal synchronization processing system is used to synchronously process the received optical signals.

2. The ultra-high-speed laser transmission system according to claim 1, characterized in that: The optoelectronic transmission system includes at least two optoelectronic transmission components and a wavelength division multiplexer. The emission light of each optoelectronic transmission component is suitable for passing through the wavelength division multiplexer to enter the optical array component. The wavelength division multiplexer is used to couple optical signals of different wavelengths on an optical fiber for simultaneous transmission to increase the available bandwidth of the optical fiber.

3. The ultra-high-speed laser transmission system according to claim 2, characterized in that: The wavelength division multiplexer includes a wavelength combining unit and a wavelength demultiplexing unit. The wavelength combining unit is located at the transmitting end of the wavelength division multiplexer and is used to combine multiple optical signals with different wavelengths at the transmitting end and couple them into the same optical fiber for transmission; the wavelength demultiplexing unit is located at the receiving end of the wavelength division multiplexer and is used to separate the optical signals of each wavelength.

4. The ultra-high-speed laser transmission system according to claim 3, characterized in that: It also includes an optical amplifier, which is located between the wave combining unit and the wave splitting unit and is used to amplify the energy of the optical signal.

5. The ultra-high-speed laser transmission system according to claim 4, characterized in that: The optical amplifier comprises a fiber amplifier.

6. The ultra-high-speed laser transmission system according to any one of claims 1 to 5, characterized in that: The photoelectric receiving system includes a wave splitter and at least two photoelectric receiving components; The wavelength splitter is used to separate optical signals of different wavelengths, and the optoelectronic receiving component is connected to the wavelength splitter to perform corresponding processing on each separated optical signal.

7. The ultra-high-speed laser transmission system according to any one of claims 1 to 5, characterized in that: The signal synchronization processing system includes a frame alignment structure and a frame counting structure. The frame alignment structure is used to perform frame alignment on the signal, and the frame counting structure is used to extract the value of the frame count.

8. A CT detection device, characterized in that: It comprises a device body and the ultra-high-speed laser transmission system according to any one of claims 1 to 7, wherein the ultra-high-speed laser transmission system is arranged on the device body.

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