Terahertz noise source power real-time regulation and control system and method

Abstract

The invention provides a terahertz noise source power real-time regulation and control system and method, and relates to the technical field of terahertz test and measurement. After a pump light source is used for providing pump light for an erbium-doped optical fiber amplifier to generate a self-excitation radiation optical signal, the optical signal is sequentially input into an optical filter, an optical mixer and a terahertz power divider, terahertz noise signal power is equally divided into two paths to be output, one path is output through a first terahertz isolator, and the other path is output through a second terahertz isolator. The terahertz noise signals are subjected to down-conversion processing through the terahertz frequency conversion module and input into the broadband signal receiving host, noise power is measured in real time and transmitted to the upper computer, and the upper computer adjusts the power of the optical signals generated by the erbium-doped optical fiber amplifier in real time according to the noise power. Therefore, the power of the output terahertz noise signal is changed and displayed in the display in real time, the real-time regulation and control of the terahertz noise source power are realized, and the accuracy and reliability of the terahertz noise coefficient test are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of terahertz testing and measurement, and in particular to a real-time control system and method for terahertz noise source power. Background Art

[0002] Noise is the irregular random fluctuation of signals in electronic devices. Noise is inevitable in any device. Noise will interfere with or even drown out the transmission and reception of normal signals. Especially when the signal is weak, the impact of noise is more significant. Noise ultimately determines the minimum signal limit that the receiver can reliably detect. Therefore, the presence of noise has a great impact on the performance of the device. Whether noise can be accurately tested is of great significance for the design verification and production of terahertz chips, modules, systems and other equipment.

[0003] The quantitative test of terahertz noise requires the help of a terahertz noise coefficient test system. As the core component of the noise coefficient test system, the terahertz noise source in the prior art is mainly based on a terahertz noise source with fixed power. It is impossible to adjust the power of the noise source according to the needs of different DUTs and test scenarios, which affects the reliability and accuracy of the test results. At the same time, the terahertz noise source in the prior art can only understand the power size and fluctuation before and after the test, and cannot monitor the working condition of the noise source in real time during the measurement process. There is a lack of monitoring of the output state of the noise source during the entire measurement process. Therefore, it is necessary to monitor the output state of the noise source in real time to provide better protection for the test process. Summary of the invention

[0004] In order to solve the problem that the terahertz noise source in the prior art cannot adjust and monitor the output power in real time, the present invention proposes a real-time control system and method for terahertz noise source power, which adjusts the power of the terahertz noise signal in real time by adjusting the erbium-doped fiber amplifier, and simultaneously uses a terahertz power splitter, a down-conversion module, a broadband signal receiving host and a host computer to measure the terahertz noise signal power in real time and display it digitally, selects the appropriate terahertz noise signal power according to the device to be tested, and realizes real-time control and monitoring of the output power of the terahertz noise source during the terahertz noise coefficient test.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A terahertz noise source power real-time control system comprises a terahertz noise source part, a terahertz noise signal receiving part and an overall control part, wherein the terahertz noise source part is used to generate a noise signal, the terahertz noise signal receiving part is used to measure the power of the noise signal, and the overall control part is used to control the noise power output by the terahertz noise source part and display the output measured noise power in real time.

[0007] Preferably, the terahertz noise source part includes a pump light source, an erbium-doped fiber amplifier, an optical filter, an optical mixer, a terahertz power splitter, a first terahertz isolator and a second terahertz isolator, wherein the pump light source, the erbium-doped fiber amplifier, the optical filter, the optical mixer and the terahertz power splitter are connected in sequence and then divided into two paths, one path is connected to the first terahertz isolator for outputting a terahertz noise signal, and the other path is connected to the second terahertz isolator for inputting a terahertz noise signal to the terahertz noise signal receiving part;

[0008] The terahertz noise signal receiving part includes a signal source, a terahertz frequency conversion module and a broadband signal receiving host, wherein the terahertz frequency conversion module is connected to the second terahertz isolator, the signal source and the broadband signal receiving host respectively, and the broadband signal receiving host is connected to the overall control part;

[0009] The overall control part includes a host computer and a display, wherein the host computer is connected to the broadband signal receiving host, the erbium-doped fiber amplifier and the display respectively, and is used to measure and display the power of the terahertz noise signal received by the broadband signal receiving host in real time, and send instructions to the erbium-doped fiber amplifier to adjust the optical signal power in real time; the display is used to display the power of the terahertz noise source in real time.

[0010] Preferably, the pump light source is used to provide pump light for the erbium-doped fiber amplifier, the erbium-doped fiber amplifier is used to generate a self-excited radiation light signal, the optical filter is used to filter the light signal, the optical mixer is used to mix the input light signal, the terahertz power divider is used to equally divide the power of the terahertz noise signal, and the first terahertz isolator and the second terahertz isolator are both used to reduce the influence of the reflected signal on the terahertz noise source.

[0011] Preferably, the signal source is used to provide a local oscillator signal for the terahertz frequency conversion module, the terahertz frequency conversion module is used to perform down-conversion processing on the terahertz noise signal, and the broadband signal receiving host is used to measure the received terahertz noise signal.

[0012] A real-time control method for terahertz noise source power is provided, using the real-time control system for terahertz noise source power as described above, and the specific control process is as follows:

[0013] The pump light source provides pump light for the erbium-doped fiber amplifier, so that the erbium-doped fiber amplifier generates a self-excited radiation light signal, the light signal enters the optical filter, enters the optical mixer after filtering by the optical filter, enters the terahertz power splitter after mixing by the optical mixer, and the terahertz power splitter divides the terahertz noise signal power into two outputs, one terahertz noise signal is output through the first terahertz isolator, and the other terahertz noise signal is input into the terahertz frequency conversion module;

[0014] The terahertz frequency conversion module performs down-conversion processing on the input terahertz noise signal, cooperates with the signal source to provide a local oscillation signal for the terahertz frequency conversion module, and inputs the down-converted terahertz noise signal into the broadband signal receiving host, and uses the broadband signal receiving host to measure the noise power in real time and transmit it to the host computer;

[0015] The host computer displays the noise power measured by the broadband signal receiving host in real time, and controls the erbium-doped fiber amplifier according to the noise power measured by the broadband signal receiving host in real time, and changes the output terahertz noise signal power by adjusting the optical signal power generated by the erbium-doped fiber amplifier, and cooperates with the display to display the power of the terahertz noise signal in real time, thereby realizing real-time regulation of the terahertz noise source power.

[0016] Beneficial technical effects brought by the present invention:

[0017] (1) The present invention proposes a system and method for real-time control of terahertz noise source power. The system realizes real-time control of the output power of the terahertz noise source by communication control of an erbium-doped fiber amplifier. The power of the noise source is adjusted according to the needs of different DUTs and test scenarios, thereby effectively improving the reliability and accuracy of the test results.

[0018] (2) The present invention proposes a real-time control system and method for terahertz noise source power, which uses a terahertz power divider to divide the power of the terahertz noise source noise signal into two output paths. After down-conversion processing by a terahertz frequency conversion module, the noise signal is received by a broadband signal receiving host and transmitted to a host computer, and numerically displayed on a display, thereby realizing real-time measurement and display of the terahertz noise signal power, which is beneficial to real-time monitoring of the working status of the terahertz noise source during the entire terahertz noise coefficient test process, and ensuring the reliability of the terahertz noise coefficient test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the real-time control system of terahertz noise source power. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] This embodiment proposes a terahertz noise source power real-time control system. Figure 1 As shown, it includes a terahertz noise source part, a terahertz noise signal receiving part and an overall control part, wherein the terahertz noise source part is used to generate a terahertz noise signal, the terahertz noise signal receiving part is used to measure the power of the terahertz noise signal, and the overall control part is used to regulate the power of the terahertz noise signal output by the terahertz noise source part, and display the output measured terahertz noise signal power in real time.

[0022] The terahertz noise source part includes a pump light source, an erbium-doped fiber amplifier, an optical filter, an optical mixer, a terahertz power splitter, a first terahertz isolator and a second terahertz isolator, wherein the pump light source is used to provide pump light for the erbium-doped fiber amplifier, the erbium-doped fiber amplifier is used to generate a self-excited radiation light signal, the optical filter is used to filter the light signal, the optical mixer is used to mix the input light signal, the terahertz power splitter is used to equally divide the power of the terahertz noise signal, and the first terahertz isolator and the second terahertz isolator are both used to reduce the influence of the reflected signal on the noise source.

[0023] The pump light source, erbium-doped fiber amplifier, optical filter, optical mixer, and terahertz power divider are connected in sequence and divided into two paths, one path is connected to the first terahertz isolator for outputting terahertz noise signals, and the other path is connected to the second terahertz isolator and connected to the terahertz noise signal receiving part.

[0024] The terahertz noise signal receiving part includes a signal source, a terahertz frequency conversion module and a broadband signal receiving host, wherein the signal source is used to provide a local oscillator signal for the terahertz frequency conversion module, the terahertz frequency conversion module is used to down-convert the terahertz noise signal, and the broadband signal receiving host is used to measure the received terahertz noise signal.

[0025] The terahertz frequency conversion module is connected to the second terahertz isolator, the signal source and the broadband signal receiving host respectively, and the broadband signal receiving host is connected to the overall control part.

[0026] The overall control part includes a host computer and a display, wherein the host computer is used to measure and display the noise signal power received by the broadband signal receiving host in real time, and send instructions to the erbium-doped fiber amplifier to adjust the optical signal power in real time; the display is used to display the power of the terahertz noise source in real time, and the host computer is connected to the broadband signal receiving host, the erbium-doped fiber amplifier and the display respectively.

[0027] The present invention also proposes a method for real-time control of terahertz noise source power, using the real-time control system for terahertz noise source power as described above, and the specific control process is as follows:

[0028] The pump light source provides pump light for the erbium-doped fiber amplifier, so that the erbium-doped fiber amplifier generates a self-excited radiation light signal. The light signal enters the optical filter, enters the optical mixer after filtering by the optical filter, and enters the terahertz power divider after mixing by the optical mixer. The terahertz power divider divides the terahertz noise signal power into two equal outputs. At this time, one terahertz noise signal is output through the first terahertz isolator, and the other terahertz noise signal is input into the terahertz frequency conversion module.

[0029] The terahertz frequency conversion module performs down-conversion processing on the input terahertz noise signal, cooperates with a signal source to provide a local oscillation signal for the terahertz frequency conversion module, and inputs the down-converted terahertz noise signal into a broadband signal receiving host. The broadband signal receiving host is used to measure the power of the terahertz noise signal in real time and transmit it to a host computer.

[0030] The host computer displays the power of the terahertz noise signal measured by the broadband signal receiving host in real time, and controls the erbium-doped fiber amplifier according to the power of the terahertz noise signal measured in real time by the broadband signal receiving host, and changes the power of the output terahertz noise signal by adjusting the power of the optical signal generated by the erbium-doped fiber amplifier. The power of the terahertz noise signal is displayed in real time on the display, thereby realizing real-time regulation of the power of the terahertz noise source.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A terahertz noise source power real-time control system, characterized in that: The system comprises a terahertz noise source part, a terahertz noise signal receiving part and an overall control part, wherein the terahertz noise source part is used to generate a noise signal, the terahertz noise signal receiving part is used to measure the power of the noise signal, and the overall control part is used to regulate the noise power output by the terahertz noise source part and display the output measured noise power in real time.

2. The terahertz noise source power real-time control system according to claim 1, characterized in that: The terahertz noise source part includes a pump light source, an erbium-doped fiber amplifier, an optical filter, an optical mixer, a terahertz power splitter, a first terahertz isolator and a second terahertz isolator, wherein the pump light source, the erbium-doped fiber amplifier, the optical filter, the optical mixer and the terahertz power splitter are connected in sequence and then divided into two paths, one path is connected to the first terahertz isolator for outputting a terahertz noise signal, and the other path is connected to the second terahertz isolator for inputting a terahertz noise signal to the terahertz noise signal receiving part; The terahertz noise signal receiving part includes a signal source, a terahertz frequency conversion module and a broadband signal receiving host, wherein the terahertz frequency conversion module is connected to the second terahertz isolator, the signal source and the broadband signal receiving host respectively, and the broadband signal receiving host is connected to the overall control part; The overall control part includes a host computer and a display, wherein the host computer is connected to the broadband signal receiving host, the erbium-doped fiber amplifier and the display respectively, and is used to measure and display the power of the terahertz noise signal received by the broadband signal receiving host in real time, and send instructions to the erbium-doped fiber amplifier to adjust the optical signal power in real time; the display is used to display the power of the terahertz noise source in real time.

3. The terahertz noise source power real-time control system according to claim 2, characterized in that: The pump light source is used to provide pump light for the erbium-doped fiber amplifier, the erbium-doped fiber amplifier is used to generate a self-excited radiation light signal, the optical filter is used to filter the light signal, the optical mixer is used to mix the input light signal, the terahertz power divider is used to equally divide the power of the terahertz noise signal, and the first terahertz isolator and the second terahertz isolator are both used to reduce the influence of the reflected signal on the terahertz noise source.

4. The terahertz noise source power real-time control system according to claim 3, characterized in that: The signal source is used to provide a local oscillator signal for the terahertz frequency conversion module, the terahertz frequency conversion module is used to perform down-conversion processing on the terahertz noise signal, and the broadband signal receiving host is used to measure the received terahertz noise signal.

5. A method for real-time control of terahertz noise source power, characterized in that: The real-time control system for terahertz noise source power according to claim 4 is used, and the specific control process is as follows: The pump light source provides pump light for the erbium-doped fiber amplifier, so that the erbium-doped fiber amplifier generates a self-excited radiation light signal, the light signal enters the optical filter, enters the optical mixer after filtering by the optical filter, enters the terahertz power splitter after mixing by the optical mixer, and the terahertz power splitter divides the terahertz noise signal power into two outputs, one terahertz noise signal is output through the first terahertz isolator, and the other terahertz noise signal is input into the terahertz frequency conversion module; The terahertz frequency conversion module performs down-conversion processing on the input terahertz noise signal, cooperates with the signal source to provide a local oscillation signal for the terahertz frequency conversion module, and inputs the down-converted terahertz noise signal into the broadband signal receiving host, and uses the broadband signal receiving host to measure the noise power in real time and transmit it to the host computer; The host computer displays the noise power measured by the broadband signal receiving host in real time, and controls the erbium-doped fiber amplifier according to the noise power measured by the broadband signal receiving host in real time, and changes the output terahertz noise signal power by adjusting the optical signal power generated by the erbium-doped fiber amplifier, and cooperates with the display to display the power of the terahertz noise signal in real time, thereby realizing real-time regulation of the terahertz noise source power.

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