Ultra-high-speed laser transmission system and CT examination device

Abstract

The present application relates to the technical field of medical imaging, and provides an ultra-high-speed laser transmission system and a CT examination device. A photoelectric emission system is suitable for emitting optical signals of at least two different wavelengths. An optical array assembly comprises an even number of transmitting lenses and a receiving lens. The transmitting lenses are connected to the photoelectric emission system. The transmitting lenses are arranged on a rotor structure in a circumferential array, and the wavelengths of optical signals passing through two adjacent transmitting lenses are different. The receiving lens is arranged on a stator structure, the field of view of the receiving lens covering emergent areas of at least two transmitting lenses, and the receiving lens being used for receiving spatial light beams emitted by two adjacent transmitting lenses into a single optical fiber for transmission. A photoelectric reception system is connected to the receiving lens, and is used for separating signals of different wavelengths so as to perform corresponding signal processing. A signal synchronization processing system is used for performing synchronization processing on received optical signals. The system of the present application has a simple configuration and is convenient to install, which can optimize bandwidth and improve transmission efficiency.

Description

Ultra-high-speed laser transmission system and CT detection equipment

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 2024113696382, filed on September 29, 2024, entitled “Ultra-high-speed laser transmission system and CT detection equipment,” which is incorporated by reference herein in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of medical imaging technology, in particular to an ultra-high-speed laser transmission system and a CT detection equipment. BACKGROUND

[0004] Computed Tomography (CT) is a medical imaging technology that uses precise X-ray beams and highly sensitive detectors to scan objects layer by layer. By processing the scanned data with a computer, high-resolution images of the internal cross-section, coronal section, or sagittal section of the object can be generated.

[0005] To improve the data transmission rate of the CT system, a CT slip ring system based on optical fiber data transmission is disclosed in Chinese Patent Application No. CN101006925A. The following content is specifically disclosed. When the rotating part performs rotational scanning, the laser diode and the corresponding focusing lens rotate with it. In order to receive the light beam focused by the focusing lens, a limited length of optical fiber bundle is arranged around the circumference of the rotating part in the CT system. The optical fiber bundle transmits the received optical signal to an optical / electricity 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.

[0006] Although the above scheme can improve the data transmission rate of the CT system to some extent, since the above scheme arranges a plurality of focusing lenses on the rotating part, and the receiving side uses an array of light beams for receiving, the light of each receiving light beam is weak, and so many light beam arrays receive the same light signal. Therefore, the above scheme has the following defects.

[0007] (1) Multiple optical / electricity conversion systems are used for receiving, and there are two optical / electricity conversion systems that simultaneously collect signals, which need to process the same collected signals. Since there is an optical path difference between the two signals, the two received signals have different time delays. Whether the optical path signal is selected or the optical path difference of the two signals is strictly controlled, the signal processing process is very complex, which will affect the improvement of the communication rate.

[0008] (2) The use of fiber bundle arrays can cause the power of the received signal to be received by multiple receivers, and the energy of a single beam is low, which cannot support the low sensitivity requirement under the condition of ultra-high speed. At the same time, the use of multiple receiving beams in the beam array requires a very large number of receiving systems, and the system setting is complex. SUMMARY

[0009] The first aspect of the present application provides an ultra-high-speed laser transmission system to solve the above-mentioned defects in the prior art. The system setting is simple, easy to install, and the signal processing process is not affected by the speed increase. The bandwidth can be optimized to reduce network congestion and delay and improve transmission efficiency.

[0010] The second aspect of the present application provides a CT detection device.

[0011] The first aspect of the present application provides an ultra-high-speed laser transmission system, which comprises an optoelectronic emission system, an optical emission array, an optoelectronic receiving system, and a signal synchronization processing system.

[0012] The optoelectronic emission system is adapted to emit at least two different wavelengths of light signals;

[0013] The optical array assembly comprises an even number of emission lenses and receiving lenses. The even number of emission lenses are connected with the optoelectronic emission system. The even number of emission lenses are arranged in a circumferential array on a rotor structure. The wavelengths of the light signals passing through adjacent two emission lenses are different. The receiving lens is arranged on a stator structure. The field of view range of the receiving lens covers the exit regions of at least two emission lenses, and is used to receive the spatial light beams emitted by the adjacent two emission lenses into a single optical fiber for transmission.

[0014] The optoelectronic receiving system is connected with the receiving lens. The optoelectronic receiving system is used to separate the signals of different wavelengths for corresponding signal processing. The signal synchronization processing system is used to synchronize the received optical signals.

[0015] According to the ultra-high-speed laser transmission system provided by the present application, the optoelectronic emission system comprises at least two optoelectronic emission assemblies and a wavelength division multiplexer. The emission light rays of each optoelectronic emission assembly are adapted to pass through the wavelength division multiplexer and enter the optical array assembly. The wavelength division multiplexer is used to couple different wavelengths of light signals on a single optical fiber for simultaneous transmission, so as to increase the available bandwidth of the optical fiber.

[0016] According to the ultra-high-speed laser transmission system provided by the present application, the wavelength division multiplexer comprises a combining unit and a splitting unit. The combining unit is located at the sending end of the wavelength division multiplexer, and is used to combine multiple light signals with different wavelengths at the sending end and couple them into the same optical fiber for transmission. The splitting unit is located at the receiving end of the wavelength division multiplexer, and is used to separate the light signals of different wavelengths.

[0017] The super-high-speed laser transmission system provided in the present application further comprises an optical amplifier, which is located between the combining unit and the splitting unit, and is used to amplify the energy of the optical signals.

[0018] The super-high-speed laser transmission system provided in the present application, wherein the optical amplifier comprises a fiber amplifier.

[0019] The super-high-speed laser transmission system provided in the present application, wherein the photoelectric receiving system comprises a splitter and at least two photoelectric receiving components.

[0020] The splitter is used to separate optical signals of different wavelengths, and the photoelectric receiving components are connected to the splitter and used to process the separated optical signals correspondingly.

[0021] The super-high-speed laser transmission system provided in the present application, wherein the signal synchronization processing system comprises a frame positioning structure and a frame counting structure, the frame positioning structure is used to perform frame positioning on the signals, and the frame counting structure is used to extract the value of frame counting.

[0022] The second aspect of the present application provides a CT detection device, which comprises a device main body and the super-high-speed laser transmission system according to any one of the above aspects, and the super-high-speed laser transmission system is arranged in the device main body.

[0023] The super-high-speed laser transmission system provided in the present application, by deploying at least two optical signals of different wavelengths at the sending end, so that the two signals transmitted in a single optical fiber are signals of two wavelengths, and by respectively connecting the at least two optical signals of different wavelengths into different transmitting lenses of an optical array component, the receiving end of the optical array component uses a receiving lens to receive the spatial light beams emitted by the adjacent two transmitting lenses into a single optical fiber for transmission, which can reduce the difficulty and cost of adjusting and installing the super-high-speed laser transmission system. After transmission, the optical signals are synchronously processed by the photoelectric receiving system and the signal synchronization processing system, which not only can simplify the complexity of the entire super-high-speed laser transmission system, but also can improve the transmission rate from hundreds of Gbps to Tbps. The system is simple to set up and easy to install, and the signal processing process is not affected by the rate improvement, which can optimize the bandwidth to reduce network congestion and delay and improve transmission efficiency.

[0024] The CT detection device provided in the present application has at least all the advantages of the super-high-speed laser transmission system provided in the present application, because the CT detection device and the super-high-speed laser transmission system belong to the same inventive concept. In addition, the CT detection device provided in the present application comprises the super-high-speed laser transmission system, which 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 DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments of the application, and all other drawings obtained by those of ordinary skill in the art without creative work based on these drawings are within the protection scope of the application.

[0026] Fig. 1 is a structural schematic diagram of an ultra-high-speed laser transmission system provided by an embodiment of the application;

[0027] Fig. 2 is a structural schematic diagram of an optical array assembly provided by an embodiment of the application;

[0028] Fig. 3 is an optical path schematic diagram of a fiber amplifier provided by an embodiment of the application;

[0029] Fig. 4 is a schematic diagram of an optoelectronic transmitting and receiving system provided by an embodiment of the application;

[0030] Fig. 5 is a schematic diagram of the influence of path delay on received signals using optical signals of the same wavelength;

[0031] Fig. 6 is a schematic diagram of the influence of path delay on received signals using optical signals of different wavelengths;

[0032] Fig. 7 is a structural schematic diagram of a signal synchronization processing system provided by an embodiment of the application.

[0033] Reference signs: 10, optoelectronic transmitting system; 20, optical array assembly; 21, stator structure; 211, receiving lens; 22, rotor structure; 221, transmitting lens; 30, optoelectronic receiving system; 40, signal synchronization processing system. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the application more clear, the technical solutions in the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are only some embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the protection scope of the application.

[0035] In the description of the embodiments of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0036] In the embodiments of the present application, unless specifically defined and limited, a first feature is "on", "under", "above", or "over" a second feature can 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, the first feature "above", "over", and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "below", "under", and "under" the second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0037] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0038] FIG. 1 is a structural schematic diagram of a super-high-speed laser transmission system provided by the present application. FIG. 2 is a structural schematic diagram of an optical array assembly provided by the present application.

[0039] Referring to FIGS. 1 and 2, the present application provides a super-high-speed laser transmission system, which is mainly used for CT monitoring equipment, and of course can also be used in other fields, such as video streaming media, big data cloud computing, etc.

[0040] The super-high-speed laser transmission system includes an optoelectronic emission system 10, an optical array assembly 20, an optoelectronic receiving system 30, and a signal synchronization processing system 40.

[0041] The optoelectronic emission system 10 can emit at least two different wavelengths of light signals, that is, the optoelectronic emission system 10 can emit at least two different wavelengths of light signals, and can also emit three different wavelengths of light signals according to needs. The transmission signals of the at least two different wavelengths of light signals are consistent. The present application takes the optoelectronic emission system 10 emitting two different wavelengths of light signals as an example for description, and the optoelectronic emission system 10 is also used to divide the amplified light signals and then access the optical array assembly 20.

[0042] The optical array assembly 20 is connected with the optoelectronic transmitting system 10, the optical array assembly 20 comprises an even number of transmitting lenses 221 and receiving lenses 211, the even number of transmitting lenses 221 are arranged in a circumferential array on the rotor structure 22, the transmitting lenses 221 are collimating lenses for collimating the light entering the optical spectrum analyzer, and the wavelengths of the light signals passing through adjacent two transmitting lenses 221 are different. The receiving lenses 211 are arranged on the stator structure 21, the receiving range of the receiving lenses 211 covers the exit regions of at least two transmitting lenses 221, for receiving the spatial light beams emitted by adjacent two transmitting lenses 221 into a single optical fiber for transmission, and the receiving lenses 211 can be arranged singly or in plurality. The rotor structure 22 rotates relative to the stator structure 21, and the rotor structure 22 is arranged on a slip ring for power supply.

[0043] The optoelectronic receiving system 30 is connected with the receiving lenses 211, for separating the received light signals of different wavelengths for corresponding signal processing. The signal synchronization processing system 40 is used for synchronously processing the received light signals.

[0044] It can be understood that the super-high-speed laser transmission system provided by the embodiments of the present application can reduce the difficulty and cost of assembling and adjusting the super-high-speed laser transmission system by deploying at least two light signals of different wavelengths at the transmitting end, so that the two signals transmitted in a single optical fiber are signals of two wavelengths, and by respectively inputting the at least two light signals of different wavelengths into different transmitting lenses 221 of the optical array assembly 20, and by using the receiving lenses 211 at the receiving end of the optical array assembly 20 to receive the spatial light beams emitted by adjacent two transmitting lenses 221 into a single optical fiber for transmission. The transmitted light signals are synchronously processed by the optoelectronic receiving system 30 and the signal synchronization processing system 40, which not only can simplify the complexity of the entire super-high-speed laser transmission system, but also can increase the transmission rate from hundreds of Gbps to Tbps. The system is simple in overall arrangement and convenient to install, and is not affected by the rate increase in the signal processing process, and can optimize the bandwidth to reduce network congestion and delay and improve transmission efficiency.

[0045] Continuing to refer to FIG. 1, in some embodiments of the present application, the optoelectronic transmitting system 10 comprises at least two optoelectronic transmitting assemblies and a wavelength division multiplexer, and the optoelectronic transmitting assemblies are transmitters. The light signals emitted by each optoelectronic transmitting assembly are suitable for entering the optical array assembly 20 after passing through the wavelength division multiplexer, and the wavelength division multiplexer is used for coupling multiple light signals of different wavelengths on a single optical fiber for simultaneous transmission, so as to increase the available bandwidth of the optical fiber.

[0046] In the super high-speed laser transmission system, a wavelength division multiplexer is installed in the optical fiber between the sending end and the receiving end, used to combine the optical signals of different wavelengths sent by at least two optoelectronic transmitting assemblies into a wavelength multiplexed optical signal, transmitted through a single optical fiber, and then separated by a wavelength division demultiplexer at the receiving end, and then sent to the optical array assembly 20 respectively.

[0047] For example, two optoelectronic transmitting assemblies are respectively denoted as optoelectronic transmitting assembly 1 and optoelectronic transmitting assembly 2, the optoelectronic transmitting assembly 1 sends out optical signals with a wavelength of λ1, and the optoelectronic transmitting assembly 2 sends out optical signals with a wavelength of λ2, the optical signals λ1 and λ2 are transmitted to the optical array assembly 20 through the wavelength division multiplexer, 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, and by deploying two wavelength intervals at the sending 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 subjected to synchronous processing by the signal synchronous processing system 40, which is not affected by the rate improvement, can optimize the bandwidth, reduce network congestion and delay, and improve the signal transmission efficiency.

[0048] Continuing to refer to FIG. 1, in some embodiments of the present application, the wavelength division multiplexer includes a combining unit and a separating unit, the combining unit is located at the sending end of the wavelength division multiplexer, used to combine multiple optical signals (carrying various information) with different wavelengths through the multiplexer (also known as the combiner) at the sending end, and coupled to the same optical fiber of the optical line for transmission. The separating unit is located at the receiving end of the wavelength division multiplexer, used to separate various wavelength optical signals through the demultiplexer (also known as the demultiplexer or the de-multiplexer).

[0049] The separated optical signals λ1 and λ2 are connected to the optical array assembly 20, 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 assembly 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 through the demultiplexer and respectively connected to different optoelectronic receiving systems 30 to restore the original signal, and then subjected to synchronous processing by the signal synchronous processing system 40, which is not affected by the rate improvement, can optimize the bandwidth, reduce network congestion and delay, and improve the signal processing efficiency.

[0050] Continuing to refer to FIG. 1, in some embodiments of the present application, the super high-speed laser transmission system further includes an optical amplifier, which is located between the combining unit and the separating unit, based on the stimulated emission of laser, the energy of the pump light is converted into the energy of the optical signal to realize the amplification effect. Thus, the intensity of the optical signal is enhanced to improve the transmission distance and quality of the signal.

[0051] The optical amplifier comprises a semiconductor amplifier and a fiber amplifier. The semiconductor amplifier is classified into a resonant type and a traveling wave type. The fiber amplifier is classified into a rare earth element doped fiber amplifier and a nonlinear optical amplifier.

[0052] The embodiment of the present application takes the rare earth element doped fiber amplifier as an example for illustration, i.e. rare earth ions (such as erbium, praseodymium, thulium, etc.) are doped in the fiber as laser active substance. The gain bandwidth of each dopant is different. The gain band of the erbium doped fiber amplifier is wide, covering S, C and L bands; the gain band of the thulium doped fiber amplifier is S band; and the gain band of the praseodymium doped fiber amplifier is near 1310 nm.

[0053] Fig. 3 is a schematic diagram of an optical path of the fiber amplifier according to the embodiment of the present application.

[0054] Referring to Fig. 3, the fiber amplifier is used to amplify the low power output optical signal into a high power output optical signal, to support a longer attenuation distance, to ensure that the received signal at the receiving end is within an acceptable range, and the output power is as high as xW and the noise coefficient is less than 5 dB.

[0055] The output power of the single-stage erbium doped fiber amplifier reaches 22 dBm, which is close to the limit, and the noise coefficient can still be kept low. Therefore, the optical path design of the high power optical amplifier adopts a two-stage cascaded amplification optical path structure, as shown in Fig. 3. The first stage amplification is called pre-amplification, which uses a 976 nm single mode pumped erbium doped fiber to amplify the input signal, preliminarily increases the power of the input signal, and controls the noise coefficient to be below 4.5 dB; the second stage amplification uses a double-clad amplification technology, both of which use 940 nm multi-mode pumping as the excitation source and double-clad erbium-ytterbium co-doped fiber as the gain medium, and adopts a reverse pumping mode in structure to improve the pumping conversion efficiency.

[0056] 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, the power consumption and reliability also need to be considered.

[0057] Continuing to refer to Fig. 1, the photoelectric receiving system 30 comprises a wave divider and at least two photoelectric receiving components, and the photoelectric receiving components are receivers. The wave divider is used to divide 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.

[0058] The receiving lens 211 of the optical array component 20 is equivalent to a combiner, and forms a wavelength division multiplexing system with the wave divider of the photoelectric receiving system 30, i.e. the super-high speed laser transmission system provided by the embodiment of the present application adopts a multi-stage wavelength division multiplexing system to increase the available bandwidth of the optical fiber and improve the transmission rate of the signal.

[0059] Referring to FIGS. 1 and 2, an even number of emission lenses 221 are arranged on the rotor structure 22 in a circumferential array, i.e., evenly distributed on the rotor structure 22, and adjacent two emission lenses 221 transmit light signals of different wavelengths.

[0060] For example, the emission lenses 221, such as A1, A2, A3, A4, A5, An, are fixed on the rotor structure 22 at intervals, and B1 is a receiving lens 211 fixed on the stator structure 21. The field of view of the receiving lens 211 is related to the positional relationship of adjacent two emission lenses 221, and the structural parameters of the receiving lens 211 can be determined according to the positions of the adjacent two emission lenses 221, so that the field of view of the receiving lens 211 covers the light emission areas of the adjacent two emission lenses 221, thereby enabling the light signals emitted by the adjacent two emission lenses 221 to be simultaneously received regardless of the positions of the emission lenses.

[0061] The light signals amplified by the fiber amplifier in the wavelength division multiplexer are divided into two light signals of λ1 and λ2 by the wave divider. The light signal of wavelength λ1 enters the emission lenses A1 and A3 after being divided by the two-in-one optical fiber, and the light signal of wavelength λ2 enters the emission lens A2. The three light signals are collimated by the emission lenses A1, A2, and A3, respectively, and then emitted along the radial direction of the rotor structure 22. The receiving field of the receiving lens B1 spreads along the radial direction of the rotor and completely covers the emission ranges of the emission lenses A1 to A3. During the rotation of the rotor structure 22, the receiving lens B1 receives the light signals of the combined beams of λ1 and λ2 collimated and emitted by the emission lenses A1 to A3, which are coupled into a single optical fiber by the receiving lens B1, transmitted by the single optical fiber, divided by the wave divider (i.e., the demultiplexer), and then the divided light signal λ1 enters the optoelectronic receiving assembly 1 for processing, and the divided light signal λ2 enters the optoelectronic receiving assembly 2 for processing, and the processed signals are sent to the signal synchronization processing system 40 for synchronization processing.

[0062] FIG. 4 is a schematic diagram of an optoelectronic emission and receiving system according to an embodiment of the present application.

[0063] Referring to FIG. 4, TX is an electrical signal input into the transmitting end of the super-high-speed laser transmission system. After the clock recovery of the signal by CDR (clock and data recovery), the signal is regenerated and output to LDDRIVER (laser driver) to amplify the small signal into a large signal. The laser driver modulates the electrical signal into an optical signal. The TOSA (transmitter optical subassembly) emits the optical signal.

[0064] The ROSA (receiver optical subassembly) converts the received optical signal into an electrical signal by PIN, and the signal is amplified by TIA (transimpedance amplifier) for processing. The CDR performs clock and data recovery, and the data is regenerated and recovered before being sent to RX.

[0065] Wherein, TEC is a semiconductor refrigerator, a controller for controlling the temperature of the laser die, APC is a laser automatic power control circuit. MCU is a micro control unit, also known as single chip microcomputer or single chip microcomputer, mainly used for interface connection to perform corresponding control processing.

[0066] Figure 5 is a schematic diagram of the influence of path delay on received signals using optical signals of the same wavelength. Figure 6 is a schematic diagram of the influence of path delay on received signals using optical signals of different wavelengths.

[0067] Referring to Figures 5 and 6, the super high-speed laser transmission system provided by the embodiments of the present application compares the influence of path delay on received signals using optical signals of the same wavelength and the influence of path delay on received signals using optical signals of different wavelengths to illustrate the problem of signal interference.

[0068] Referring to Figure 5, since an even number of emission lenses 221 need to be distributed on the rotor structure 22, the signal of each emission lens 221 is transmitted through an optical fiber, so each emission lens 221 corresponds to an optical fiber, and the lengths of each optical fiber are not equal. In the transmission process of the super high-speed laser transmission system, the unequal lengths of the optical fibers will cause signal transmission delay, so that when the receivers enter the same optical fiber, the signals will interfere with each other, which can easily lead to signal reception failure.

[0069] As shown in Figure 6, the super high-speed laser transmission system provided by the embodiments of the present application uses a wavelength division multiplexing system. When two wavelengths of optical signals, i.e., optical signal λ1 and optical signal λ2, enter the receiver through different paths at the same time, the two signals with different delays can be extracted through a wavelength division demultiplexer, and there is no mutual interference between the two signals.

[0070] Figure 7 is a schematic diagram of the structure of the signal synchronization processing system 40 provided by the embodiments of the present application.

[0071] Referring to Figure 7, the signal synchronization processing system 40 includes a frame positioning structure and a frame counting structure. The frame positioning structure is used for frame positioning of the signal, and the frame counting structure is used for extracting the value of the frame count.

[0072] Since the baseband signals of the optical signals of two different wavelengths transmitted in the super-high-speed laser transmission system provided in the embodiment of the present application are completely consistent, when the optical signals are received, the outgoing optical signals are in a rotating state with the rotor structure 22, and there are cases of receiving one optical signal or simultaneously receiving two optical signals. With the rotation of the rotor structure 22, the path that receives the optical signal first will gradually rotate out of the field of view of the receiving lens 211, and the newly accessed optical signal will change from weak to strong. The received signals need to be synchronized and judged, so that in the case of uninterrupted signal transmission, a complete signal is combined from the two received signals and transmitted to the back-end processing.

[0073] As shown in FIG. 7, the two optical signals have the same frame header signal, and the synchronization frame header can be processed in parallel. When the signals are synchronized, the order of the two signals can be judged first, and then the quality of the first-arriving signal is judged according to the channel quality information such as signal-to-noise ratio. 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, the optical signal of the second-arriving optical path needs to be switched to be received. In order to prevent data from being missed and repeatedly received, the received data signal is synchronized, and whether the received frame is repeated or missed is judged according to the count in the data frame.

[0074] Frame positioning is a fixed sequence of numbers with strong autocorrelation. Frame positioning can be performed, and MFAS is used as frame counting. After frame positioning is completed, the value of frame counting can be extracted to determine which frame is currently received, so that the two parallel received paths can be judged to determine whether the received frame is repeated or missed, so as to ensure that a complete transmission sequence is formed and signal synchronization processing is realized.

[0075] The super-high-speed laser transmission system provided in the embodiment of the present application uses multiple transmitters for optical and electrical emission components to emit signals of different wavelengths, converts the collected signals into high-speed optical signals, and sends the high-speed optical signals to the optical signal amplification part. The amplified optical signals are divided into optical signals of different wavelengths by a wavelength division multiplexing system, the optical signals of different wavelengths are respectively connected to the optical array assembly, the spatial light beams are received by the optical receiving lens 211, then enter the wave divider to decompose the two optical signals of different wavelengths, and are respectively connected to different optical receiving components for processing. Finally, the signal synchronization processing system 40 synchronizes the two received signals, and the final data is sent to the subsequent processing part.

[0076] The super-high-speed laser transmission system provided by the embodiment of the present application amplifies the optical signal by setting the optical fiber amplifier, so that the optical signal can support a longer transmission distance. The wavelength division multiplexing system is adopted to simultaneously transmit the same information through multiple wavelengths, so that the signal can be reliably received at the receiving end, thereby overcoming the problem of optical path difference in multi-path transmission without the need for optical path calibration, and the installation is convenient. Moreover, the receiving side of the optical array assembly 20 adopts the receiving lens 211, which can reduce the difficulty and cost of the installation and adjustment of the super-high-speed laser transmission system. Finally, the signal synchronization processing technology is adopted to simplify the complexity of the entire super-high-speed laser transmission system, and the transmission rate is improved from hundreds of Gbps to Tbps without the need to change the original structure of the system too much.

[0077] The embodiment of the present application also provides a CT detection device, which comprises a device main body and the super-high-speed laser transmission system of any one of the embodiments.

[0078] The CT detection device provided by the present application has at least all the advantages of the super-high-speed laser transmission system provided by the present application, because the CT detection device and the super-high-speed laser transmission system belong to the same inventive concept. In addition, the CT detection device provided by the present application comprises the super-high-speed laser transmission system, so that the data communication is stable, the transmission efficiency is high, and the bit error rate is low when the CT detection device is running.

[0079] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An ultra-high speed laser transmission system, comprising: an optical emission system adapted to emit optical signals of at least two different wavelengths; an optical array assembly comprising an even number of emission lenses and a receiving lens, the even number of emission lenses being connected to the optical emission system, the even number of emission lenses being arranged in a circumferential array on a rotor structure, the wavelengths of the optical signals passing through adjacent two emission lenses being different; the receiving lens being arranged on a stator structure, a field of view range of the receiving lens covering at least two exit regions of the emission lenses, for receiving the spatial light beams emitted by the adjacent two emission lenses into a single optical fiber for transmission; an optical receiving system connected to the receiving lens, the optical receiving system being adapted to separate the signals of different wavelengths for corresponding signal processing; a signal synchronization processing system for synchronously processing the received optical signals.

2. The ultra-high speed laser transmission system of claim 1, wherein, The optical emission system comprises at least two optical emission assemblies and a wavelength division multiplexer, the emitted light rays of each of the optical emission assemblies being adapted to pass through the wavelength division multiplexer to enter the optical array assembly, the wavelength division multiplexer being adapted to couple the optical signals of different wavelengths on a single optical fiber for simultaneous transmission, so as to increase the available bandwidth of the optical fiber.

3. The ultra-high speed laser transmission system of claim 2, wherein, The wavelength division multiplexer comprises a combining unit and a separating unit, the combining unit being located at a transmitting end of the wavelength division multiplexer, for combining the optical signals of different wavelengths at the transmitting end and coupling the optical signals into the same optical fiber for transmission; the separating unit being located at a receiving end of the wavelength division multiplexer, for separating the optical signals of different wavelengths.

4. The ultra-high speed laser transmission system according to claim 3, further comprising an optical amplifier, the optical amplifier being located between the combining unit and the separating unit, for amplifying the energy of the optical signals.

5. The ultra-high speed laser transmission system of claim 4, wherein, The optical amplifier comprises a fiber amplifier.

6. The ultrafast laser delivery system of any of claims 1 to 5, wherein, The optical receiving system comprises a wavelength separator and at least two optical receiving assemblies; The wavelength separator is adapted to separate the optical signals of different wavelengths, the optical receiving assemblies being connected to the wavelength separator, for corresponding processing of the separated optical signals.

7. The ultrafast laser delivery system of any of claims 1 to 5, wherein, The signal synchronization processing system comprises a frame positioning structure and a frame counting structure, the frame positioning structure being adapted to perform frame positioning on the signals, and the frame counting structure being adapted to extract a frame count value.

8. A CT inspection apparatus comprising an apparatus main body and the ultrafast laser delivery system according to any one of claims 1 to 7, wherein, The ultra-high speed laser transmission system is arranged in the device main body.

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