Ultra-high speed laser transmission system and CT detection equipment

Abstract

The application relates to the field of medical imaging technology and provides an ultrahigh-speed laser transmission system and a CT detection device, wherein the photoelectric emission system is suitable for emitting light signals of at least two different wavelengths; the optical array assembly comprises an even number of emitting lenses and receiving lenses; the emitting lenses are connected with the photoelectric emission system; the emitting lenses are arranged in a circumferential array on a rotor structure; the wavelengths of the light signals passing through two adjacent emitting lenses are different; the receiving lenses are arranged on a stator structure; the field of view of the receiving lenses covers the exit regions of the at least two emitting lenses; the receiving lenses are used for receiving the spatial light beams emitted by the two adjacent emitting lenses into a single optical fiber for transmission; the photoelectric receiving system is connected with the receiving lenses; the photoelectric receiving system is used for separating the signals of different wavelengths for corresponding signal processing; and the signal synchronous processing system is used for synchronously processing the received light signals. The system is simple in structure, convenient to install, can optimize the bandwidth, and can improve the transmission efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical imaging technology, and in particular to a super-high-speed laser transmission system and a CT detection device. BACKGROUND

[0002] CT (Computed Tomography) is a medical imaging technology, which performs layer-by-layer scanning on a detection object by using precise X-ray beams and high-sensitivity detectors. A high-resolution image of the internal cross section, coronal section or sagittal section of the detection object is generated by processing the scanned data by a computer.

[0003] In order 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 CN101006925A, which specifically discloses the following content: when the rotating part performs rotation scanning, the laser diode and the corresponding focusing lens rotate. In order to receive the light beams focused by the focusing lens, a limited length of optical fiber bundle is arranged around the circumferential direction of the rotating part of the CT system. The optical fiber bundle transmits the received optical signals to an optical / electricity conversion system, such as an optical fiber sensor, which converts the optical signals into electrical signals, and then transmits the electrical signals 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 light beam array to receive, 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:

[0005] (1) Multiple optical / electricity conversion systems are used for receiving, and two optical / electricity conversion systems simultaneously receive signals, which need to process the same signals received. Since there is an optical path difference between the two signals, the two received signals have different time delays, and no matter 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.

[0006] (2) The use of the optical fiber bundle array will cause the power of the received signal to be received by multiple receivers, the energy of a single light beam is low, which cannot support the low sensitivity requirement under the condition of super-high speed, and at the same time, the use of multiple receivers by the light beam array will cause the need for a very large number of receiving systems, and the system setting is relatively complex. SUMMARY

[0007] The first aspect of the present application provides a super high-speed laser transmission system to solve the above-mentioned defects in the prior art, which is simple in system arrangement, convenient to install, not affected by rate improvement in signal processing process, can optimize bandwidth, reduce network congestion and delay, and improve transmission efficiency.

[0008] The second aspect of the present application provides a CT detection device.

[0009] The first aspect of the present application provides a super 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.

[0010] The optoelectronic emission system is adapted to emit at least two different wavelengths of light signals;

[0011] 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, and the wavelengths of light signals passing through adjacent two emission lenses are different; the receiving lens is arranged on a stator structure, and the field of view range of the receiving lens covers the exit area of at least two emission lenses, for receiving the spatial light beams emitted by the adjacent two emission lenses into a single optical fiber for transmission;

[0012] The optoelectronic receiving system is connected with the receiving lens, and the optoelectronic receiving system is used for separating different wavelengths of signals for corresponding signal processing; the signal synchronization processing system is used for synchronously processing the received light signals.

[0013] According to the super 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 to enter the optical array assembly, and the wavelength division multiplexer is used for coupling different wavelengths of light signals on a single optical fiber for simultaneous transmission, so as to increase the available bandwidth of the optical fiber.

[0014] According to the super 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, is used for combining multiple light signals with different wavelengths at the sending end, and is coupled into the same optical fiber for transmission; the splitting unit is located at the receiving end of the wavelength division multiplexer, and is used for separating light signals of different wavelengths.

[0015] According to the super high-speed laser transmission system provided by the present application, an optical amplifier is further included, which is located between the combining unit and the splitting unit, and is used for amplifying the energy of the light signals.

[0016] According to the super high-speed laser transmission system provided by the present application, the optical amplifier comprises a fiber amplifier.

[0017] The super high-speed laser transmission system provided by the application comprises a wave splitter and at least two photoelectric receiving assemblies.

[0018] The wave splitter is used for separating optical signals of different wavelengths, and the photoelectric receiving assemblies are connected with the wave splitter and used for processing the separated optical signals correspondingly.

[0019] The super high-speed laser transmission system provided by the application comprises a frame positioning structure and a frame counting structure, the frame positioning structure is used for performing frame positioning on signals, and the frame counting structure is used for extracting a frame counting value.

[0020] The second aspect of the application provides a CT detection device comprising a device main body and the super high-speed laser transmission system described in any one of the above aspects, and the super high-speed laser transmission system is arranged in the device main body.

[0021] The super high-speed laser transmission system provided by the application can reduce the difficulty and cost of assembling and adjusting the super high-speed laser transmission system by deploying at least two optical signals of different wavelengths at a sending end, making two signals transmitted in a single optical fiber be signals of two wavelengths, and respectively inputting the at least two optical signals of different wavelengths into different transmitting lenses of an optical array assembly, and receiving spatial light beams transmitted by two adjacent transmitting lenses by a receiving lens at a receiving end of the optical array assembly and transmitting the spatial light beams in a single optical fiber. The optical signals transmitted are processed synchronously by a photoelectric receiving system and a signal synchronous processing system, which can not only 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, reduce network congestion and delay, and improve transmission efficiency.

[0022] The CT detection device provided by the application has all the advantages of the super high-speed laser transmission system provided by the 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 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

[0023] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 is a structural schematic diagram of an ultra-high-speed laser transmission system provided by an embodiment of the present application.

[0025] Figure 2 is a structural schematic diagram of an optical array assembly provided by an embodiment of the present application.

[0026] Figure 3 is an optical path schematic diagram of a fiber amplifier provided by an embodiment of the present application.

[0027] Figure 4 is a schematic diagram of an optoelectronic transmitting and receiving system provided by an embodiment of the present application.

[0028] Figure 5 is a schematic diagram of the influence of path delay on a received signal using optical signals of the same wavelength.

[0029] Figure 6 is a schematic diagram of the influence of path delay on a received signal using optical signals of different wavelengths.

[0030] Figure 7 is a structural schematic diagram of a signal synchronization processing system provided by an embodiment of the present application.

[0031] Reference signs:

[0032] 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

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, but not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “connected” and “linked” should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific circumstances.

[0035] In the embodiments of the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature can be "above", "over" and "on" the second feature, which can be directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature can be "below", "under" and "on" the second feature, which can be directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0036] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" 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 present application, 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 suitable manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0037] Figure 1 is a structural schematic diagram of an ultra-high-speed laser transmission system provided by the embodiments of the present application. Figure 2 is a structural schematic diagram of an optical array assembly provided by the embodiments of the present application.

[0038] Referring to Figure 1 and Figure 2 , the present application 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.

[0039] The ultra-high-speed laser transmission system includes a photoelectric emission system 10, an optical array assembly 20, a photoelectric receiving system 30 and a signal synchronization processing system 40.

[0040] Among them, the photoelectric emission system 10 can emit at least two different wavelengths of light signals, that is, the photoelectric 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 the needs. The transmission signals of the at least two different wavelengths of light signals are consistent. The embodiments of the present application take the photoelectric emission system 10 emitting two different wavelengths of light signals as an example for description, and the photoelectric emission system 10 is also used to divide the amplified light signals and access the optical array assembly 20.

[0041] The optical array assembly 20 is connected with the photoelectric emission system 10, the optical array assembly 20 comprises an even number of emission lenses 221 and receiving lenses 211, the even number of emission lenses 221 are arranged in a circumferential array on the rotor structure 22, the emission 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 emission 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 emission lenses 221, for receiving the spatial light beams emitted by adjacent two emission lenses 221 into a single optical fiber for transmission, and the receiving lenses 211 can be arranged in single or multiple. Wherein, 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.

[0042] The photoelectric 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.

[0043] It can be understood that the super-high-speed laser transmission system provided by the embodiment 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 sending end, so that two signals of different wavelengths are transmitted in a single optical fiber, and the at least two light signals of different wavelengths are respectively input into different emission lenses 221 of the optical array assembly 20, and the receiving end of the optical array assembly 20 uses the receiving lenses 211 to receive the spatial light beams emitted by adjacent two emission lenses 221 into a single optical fiber for transmission. The transmitted light signals are synchronously processed by the photoelectric 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 improve 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 improvement in the signal processing process, can optimize the bandwidth, reduce network congestion and delay, and improve the transmission efficiency.

[0044] Continuing to refer to Figure 1 In some embodiments of the present application, the photoelectric emission system 10 comprises at least two photoelectric emission assemblies and a wavelength division multiplexer, and the photoelectric emission assembly is a transmitter. The light signals emitted by each photoelectric emission 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.

[0045] In the super high-speed laser transmission system, the 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 sent to the optical array assembly 20 respectively.

[0046] 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 of wavelength λ1, and the optoelectronic transmitting assembly 2 sends out optical signals of wavelength λ2, the optical signals λ1 and λ2 are transmitted to the optical array assembly 20 through the wavelength division multiplexer, the spatial light beams emitted by the adjacent two transmitting lenses 221 are received into a single optical fiber through a single receiving lens 211, the two wavelength signals received in the single optical fiber are obtained by deploying two wavelength intervals at the sending end, 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, the processing process is not affected by the rate improvement, the bandwidth can be optimized, the network congestion and delay can be reduced, and the signal processing efficiency can be improved.

[0047] Continuing to refer to Figure 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, and is used to combine multiple optical signals (carrying various information) with different wavelengths together at the sending end through the multiplexer (also called combiner), and couple them into the same optical fiber of the optical line for transmission. The separating unit is located at the receiving end of the wavelength division multiplexer, and is used to separate various wavelength optical signals through the demultiplexer (also called wave divider or demultiplexer).

[0048] The separated optical signals λ1 and λ2 are connected to the optical array assembly 20, the spatial light beams emitted by the adjacent two 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 wavelength signals received in the single optical fiber are obtained, and the two optical signals of different wavelengths are connected to different optoelectronic receiving systems 30 after being separated by the demultiplexer to restore the original signals, and then subjected to synchronous processing by the signal synchronous processing system 40, the processing process is not affected by the rate improvement, the bandwidth can be optimized, the network congestion and delay can be reduced, and the signal processing efficiency can be improved.

[0049] Continuing to refer to Figure 1In some embodiments of the present application, the ultra-high-speed laser transmission system further comprises an optical amplifier, which is located between the combining unit and the splitting unit, and amplifies the optical signal based on the stimulated emission of laser, by converting the energy of the pump light into the energy of the optical signal, thereby enhancing the intensity of the optical signal to improve the transmission distance and quality of the signal.

[0050] The optical amplifier comprises a semiconductor amplifier and a fiber amplifier. The semiconductor amplifier is divided into resonant type and traveling wave type. The fiber amplifier is divided into a rare earth element doped fiber amplifier and a nonlinear optical amplifier.

[0051] The embodiment of the present application takes the rare earth element doped fiber amplifier as an example for illustration, 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 wide, covering the S, C and L bands; the gain band of the thulium-doped fiber amplifier is the S band; and the gain band of the praseodymium-doped fiber amplifier is near 1310 nm.

[0052] Figure 3 The optical path schematic diagram of the fiber amplifier provided by the embodiment of the present application is shown in

[0053] Referring to Figure 3 , the fiber amplifier is used to amplify the optical signal with small power output into an optical signal with large power output, to support a longer distance of attenuation, 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 5dB.

[0054] The output power of a single-stage erbium-doped fiber amplifier reaches 22dBm, which is close to the limit, and can still maintain a low noise coefficient. Therefore, the optical path design of the high-power optical amplifier adopts a two-stage cascaded amplification optical path structure, as shown in Figure 3 The first stage amplification is called pre-amplification, which uses a 976nm single-mode pump erbium-doped fiber to amplify the input signal, preliminarily improves the power, and controls the noise coefficient below 4.5dB; the second stage amplification uses a double-clad amplification technology, both of which use 940nm multi-mode pump 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 pump conversion efficiency.

[0055] It should be noted that in the two-stage amplification optical path structure design, in addition to considering the conversion efficiency of the amplification optical path, the power consumption and reliability also need to be considered.

[0056] Continuing to refer to Figure 1The photoelectric receiving system 30 comprises a wave divider and at least two photoelectric receiving assemblies, and the photoelectric receiving assemblies are receivers. The wave divider is used for dividing the optical signals received by the single receiving lens 211 to restore the optical signal λ1 and the optical signal λ2, and the optical signal λ1 enters the corresponding photoelectric receiving assembly 1 for signal processing, and the optical signal λ2 enters the corresponding photoelectric receiving assembly 2 for signal processing.

[0057] The receiving lens 211 of the optical array assembly 20 corresponds to a wave combiner, and the wave divider of the photoelectric receiving system 30 forms a wavelength division multiplexing system, that is, 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.

[0058] Continuing to refer to Figure 1 and Figure 2 An even number of emitting lenses 221 are arranged on the rotor structure 22 in a circumferential array, that is, the even number of emitting lenses 221 are uniformly distributed on the rotor structure 22, and the wavelengths of the optical signals transmitted by the adjacent two emitting lenses 221 are different.

[0059] For example, the emitting lenses A1, A2, A3, A4, A5, An, etc. are fixedly arranged 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 of the adjacent two emitting lenses 221, and the structural parameters of the receiving lens 211 can be determined according to the positions of the adjacent two emitting lenses 221, so that the field of view angle of the receiving lens 211 covers the light emitting areas of the adjacent two emitting lenses 221, and thus the optical signals emitted by the adjacent two emitting lenses 221 can be simultaneously received regardless of the situation.

[0060] The optical signals amplified by the fiber amplifier in the wavelength division multiplexer are divided into two optical signals λ1 and λ2 by the wave divider. The optical signal with the wavelength λ1 enters the emitting lenses A1 and A3 after being divided by the two-in-one optical fiber, and the optical signal with the wavelength λ2 enters the emitting lens A2. The three optical signals are collimated by the emitting lenses A1, A2 and A3 respectively and then emitted along 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 and completely covers the emitting ranges of the emitting lenses A1 to A3. During the rotation of the rotor structure 22, the receiving lens B1 receives the optical signals with the wavelengths λ1 and λ2 emitted by the emitting lenses A1 to A3, and the optical signals 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 optical signal λ1 enters the photoelectric receiving assembly 1 for processing, and the divided optical signal λ2 enters the photoelectric receiving assembly 2 for processing, and the processed signals are synchronously processed by the signal synchronous processing system 40.

[0061] Figure 4 is a schematic diagram of the photoelectric emission and receiving system provided by the embodiment of the present application.

[0062] Referring to Figure 4 , TX is an electrical signal input into the transmitting end of the super-high-speed laser transmission system, which is regenerated after clock recovery by CDR (clock and data recovery) and output to LDDRIVER (laser driver) to amplify the small signal into a large signal, and the laser driver modulates the electrical signal into an optical signal. The TOSA (optical transmitter subassembly) emits the optical signal.

[0063] The ROSA (optical receiving assembly) converts the received optical signal into an electrical signal through PIN, which is amplified by TIA (trans-impedance amplifier) and then recovered by CDR for clock and data recovery, and the recovered data is sent to RX.

[0064] Among them, TEC is a semiconductor refrigerator, a controller for controlling the temperature of the laser tube core, APC is a laser automatic power control circuit. MCU is a micro control unit, also known as single-chip microcomputer or single-chip microcomputer, which is mainly used for interface connection for corresponding control processing.

[0065] Figure 5 is a schematic diagram of the influence of path delay on the received signal using optical signals of the same wavelength. Figure 6 is a schematic diagram of the influence of path delay on the received signal using optical signals of different wavelengths.

[0066] Referring to Figure 5 and Figure 6 , the super-high-speed laser transmission system provided by the embodiment of the present application compares the influence of path delay on the received signal using optical signals of the same wavelength and the influence of path delay on the received signal using optical signals of different wavelengths to illustrate the problem of signal interference.

[0067] 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 is easy to cause signal reception failure.

[0068] By Figure 6It can be known that the super-high-speed laser transmission system provided by the embodiment of the application adopts a wavelength division multiplexing system, when two wavelength optical signals, i.e., optical signal λ1 and optical signal λ2, enter a receiver through different paths at the same time, two different delay two-way signals can be separated by a wavelength division demultiplexer, and there is no mutual interference problem between the two-way signals.

[0069] Figure 7 Figure 1 is a structural schematic diagram of a signal synchronization processing system 40 provided by the embodiment of the application.

[0070] 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 a signal, and the frame counting structure is used for extracting a frame counting value.

[0071] Since the baseband signals of the two different wavelength optical signals transmitted in the super-high-speed laser transmission system provided by the embodiment of the 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-way optical signals or two-way optical signals at the same time. 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. It is necessary to synchronize and judge the received signals, so that a complete signal is combined from the two-way received signals without interrupting the signal transmission, and then transmitted to the back-end processing.

[0072] As Figure 7 indicated, the two-way optical signals have the same frame header signal, and the synchronization frame header can be processed in parallel, respectively. When the signals are synchronized, the order of the two-way signals can be judged first, and then the channel quality information of the two-way signals, such as signal-to-noise ratio, is judged to determine whether the quality of the first signal supports the output of the received signal. If the signal quality of the first signal is below the judgment threshold, i.e., the signal quality of the first signal is less than the signal threshold, the optical path signal entered later 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 counting in the data frame.

[0073] The frame positioning is a fixed sequence of numbers with strong autocorrelation. The frame positioning can be performed, and the MFAS is used as the frame counting. After the frame positioning is completed, the value of the frame counting can be extracted to determine which frame is currently received, so that the two-way parallel received signals 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.

[0074] The super high-speed laser transmission system provided by the embodiment of the present application, the photoelectric emission assembly adopts multiple transmitters to emit signals of different wavelengths, and converts the collected signals into high-speed optical signals to send to the optical signal amplification part, the amplified optical signals are divided 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 assembly, the spatial light beam is received by the optical receiving lens 211, enters the wave divider to decompose the two optical signals of different wavelengths, and is respectively connected to the photoelectric receiving assembly for processing, and then the signal synchronization processing system 40 synchronously processes the received two signals, and finally the data is sent to the subsequent processing part.

[0075] The super high-speed laser transmission system provided by the embodiment of the present application, the photoelectric emission assembly adopts multiple transmitters to emit signals of different wavelengths, and converts the collected signals into high-speed optical signals to send to the optical signal amplification part, the amplified optical signals are divided 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 assembly, the spatial light beam is received by the optical receiving lens 211, enters the wave divider to decompose the two optical signals of different wavelengths, and is respectively connected to the photoelectric receiving assembly for processing, and then the signal synchronization processing system 40 synchronously processes the received two signals, and finally the data is sent to the subsequent processing part.

[0076] 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.

[0077] 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. In addition, since the CT detection device provided by the present application comprises the super 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.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and 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: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An ultra-high speed laser transmission system, characterized by, The application relates to an ultra-high-speed laser transmission system, which comprises the following parts: a photoelectric emission system, which is suitable for emitting at least two light signals of different wavelengths, and the transmission signals of the light signals are consistent; an optical array assembly, which comprises an even number of emission lenses and one or more receiving lenses, the even number of emission lenses are connected with the photoelectric 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 two adjacent 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 the spatial light beams emitted by the two adjacent emission lenses are received into a single optical fiber for transmission; a photoelectric receiving system, which is connected with the receiving lens, and is used for separating the signals of different wavelengths for corresponding signal processing; a signal synchronization processing system, which is used for synchronously processing the received light signals, and comprises a frame positioning structure and a frame counting structure, the frame positioning structure is used for performing frame positioning on the signals, and the frame counting structure is used for extracting the frame counting value; wherein the signal synchronization processing system is further used for judging the switching point according to the channel quality of the two light signals of different wavelengths when the field of view range of the receiving lens transits from one emission lens to the next adjacent emission lens, and judging whether the received frames are repeated or missed by using the frame counting structure, so as to combine a complete and continuous data stream.

2. The ultra-high speed laser transmission system of claim 1, wherein, The photoelectric emission system comprises at least two photoelectric emission assemblies and a combining unit, the emitted light rays of each photoelectric emission assembly are suitable for entering the optical array assembly through the combining unit; the combining unit is used for combining the multiple light signals of different wavelengths at the sending end, and coupling the multiple light signals on an 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 photoelectric receiving system comprises a separating unit and at least two photoelectric receiving assemblies; the separating unit is used for separating the light signals of different wavelengths, and the photoelectric receiving assemblies are connected with the separating unit and are used for performing corresponding processing on the separated light signals.

4. The ultra-high speed laser transmission system of claim 3, wherein, The application further comprises an optical amplifier, which is arranged on the transmission path of the light beams between the combining unit and the separating unit, and is used for amplifying the energy of the light signals.

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

6. A CT detection apparatus characterized by comprising: The application further comprises a device main body and the ultra-high-speed laser transmission system according to any one of claims 1 to 5, and the ultra-high-speed laser transmission system is arranged in the device main body.

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