One-source dual-channel intelligent modulation frequency-doubling optical system based on ilta-edfa-iq-ppln integrated architecture

Abstract

The application belongs to the technical field of temperature control equipment, and in particular to a one-source double-channel intelligent modulation frequency multiplication optical system based on an ILTA-EDFA-IQ-PPLN integrated architecture, which comprises an optical path execution subsystem adopting a one-source double-channel optical path topology architecture, containing a narrow linewidth laser, at least one erbium-doped fiber amplifier, at least one IQ quadrature optical signal modulator, at least one periodically poled lithium niobate nonlinear frequency multiplication device, and a plurality of optical splitters, for generating and regulating the conversion of 1560nm band laser to 780nm band laser; the application simultaneously provides high-stable narrow linewidth laser and high-power adjustable laser through the one-source double-channel topology design, improving the functional flexibility of the system. This design enables the system to adapt to multiple scene requirements in atomic detection, such as cold atom interference, atomic cooling and capture, atomic excitation detection, etc., without the need for additional configuration of multiple sets of laser systems, thereby reducing the use cost and complexity.

Description

Technical Field

[0001] This invention relates to the fields of optoelectronic systems and atomic measurement, and more particularly to a single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture. Background Technology

[0002] In the interdisciplinary field of optoelectronic system integration and atomic precision measurement technology, especially for high-precision measurement requirements in mobile vibration environments such as vehicle-mounted, ship-mounted, and airborne applications, traditional high-performance 780nm laser systems face numerous technical challenges. 780nm lasers, due to their precise matching of the characteristic energy level transitions of rubidium (Rb) atoms, have become a core light source in atomic physics, widely used in precision measurement, quantum technology, biomedicine, and industrial sensing. However, traditional laser systems exhibit significant defects and shortcomings when meeting the demanding conditions of mobile platform applications.

[0003] Traditional high-performance 780nm laser systems typically consist of cascaded discrete units, including narrow-linewidth seed lasers, multi-stage fiber amplifiers, acousto-optic or electro-optic modulators, waveguides or bulk crystal frequency doublers, and multiple beam splitters and monitoring optical paths. This discrete design results in a large and heavy system, far exceeding the strict space and weight constraints of mobile platforms.

[0004] Discrete optical platforms are extremely sensitive to micro-vibrations. When the vibration acceleration is ≥0.5g, optical path misalignment is easily caused, leading to laser frequency instability. The mean time between failures (MTBF) of the system in mobile environments is generally ≤500h, far below the engineering requirements. This is mainly attributed to the lack of targeted vibration-resistant design in the system. The optical core is mechanically coupled to the outer shell, and vibration is directly transmitted to the core optoelectronic devices.

[0005] Each functional unit is independently powered, temperature-controlled, and controlled, with numerous interconnected interfaces. Startup timing, power matching, and fault protection all require manual intervention, lacking unified status monitoring and health management (PHM) capabilities. This makes debugging and maintenance difficult for non-professionals. This stems from the system's "distributed control" model, lacking a unified intelligent master control unit, and failing to achieve coordinated linkage and automated management of the various modules.

[0006] Traditional architectures are mostly single-channel designs, capable of outputting only 780nm laser with a single performance characteristic, which cannot simultaneously meet the differentiated requirements of "clock transition detection" and "atom cooling / trapping" in atomic detection. This is mainly due to the fixed optical path topology design, which fails to achieve optimized allocation of performance and function.

[0007] Fault localization relies on professional personnel and specialized instruments to troubleshoot point by point, with an average repair time of ≥4 hours. Furthermore, core components are fixedly connected to the optical path, and disassembly and maintenance can easily lead to optical path misalignment. This is mainly due to the lack of embedded monitoring and rapid diagnostic mechanisms in the system, and the lack of standardized, pluggable interfaces for optical path connections. Summary of the Invention

[0008] To address the aforementioned problems, this invention proposes a single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture, which more accurately solves the problems mentioned in the background art.

[0009] This invention is achieved through the following technical solution:

[0010] This invention proposes a single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture, comprising: an optical path execution subsystem, adopting a "single-source dual-channel" optical path topology, including a narrow-linewidth laser, at least one erbium-doped fiber amplifier, at least one IQ orthogonal optical signal modulator, at least one periodically polarized lithium niobate nonlinear frequency doubling device, and multiple beam splitters for generating and controlling the conversion of 1560nm band laser to 780nm band laser; an electrical control and management subsystem, including an intelligent main control unit and an integrated power supply unit, for realizing intelligent control and power supply management of each component in the optical path execution subsystem; and a structural packaging subsystem, integrating all components of the optical path execution subsystem and the electrical control and management subsystem into a standardized metal package to achieve high integration and vibration-resistant design.

[0011] Preferably, the "one-source dual-channel" architecture of the optical path execution subsystem specifically includes: the first channel is a high-stability frequency doubling channel, which directly converts the 1560nm laser output from the narrow linewidth laser into a high-purity 780nm laser output after pre-amplification through a PPLN frequency doubling device, for applications with extremely high long-term frequency stability requirements; the second channel is a modulated and high-power channel, which integrates an IQ modulator and a multi-stage fiber amplifier on the pre-amplified 1560nm laser path to achieve complex modulation and high-power amplification of the laser signal, and converts it into a modulated 780nm laser output through a PPLN frequency doubling device.

[0012] Preferably, the intelligent main control unit of the electronic control management subsystem further includes: a multi-variable collaborative control algorithm module, used to automatically calculate and set the optimal combination of narrow linewidth laser power, pump current of each stage amplifier, and frequency multiplier temperature according to the target output power; a system-wide status monitoring module, used to collect and analyze the optical power, PPLN temperature, and pump status parameters of each node in real time; and an embedded protection mechanism module, which executes preset protection algorithms, including but not limited to amplifier pump shutdown when there is no light, PPLN temperature exceeding tolerance alarm and power reduction, and output power closed-loop stabilization.

[0013] Preferably, the structural packaging subsystem adopts an extremely compact packaging design, with all optical, electronic, and control components integrated into a standardized metal package with dimensions not exceeding 300mm×280mm×45mm, and key components such as narrow linewidth lasers adopt a two-stage vibration-resistant mounting design.

[0014] Preferably, the IQ modulator in the second channel supports multiple digital modulation modes, including but not limited to QPSK, QAM, OFDM, and special modulation modes such as CS-SSB, and has a carrier sideband rejection ratio ≥20dB and a modulation bandwidth >20GHz.

[0015] Preferably, the second channel leads out embedded monitoring light after each of the two IQ modulator nodes for real-time feedback control, ensuring the accuracy and stability of the modulated signal.

[0016] Preferably, the system also includes a full-link system protection mechanism to monitor and respond quickly to overpower, overtemperature, optical path offset, and device malfunctions in real time, in order to prevent damage to core components.

[0017] Preferably, the system achieves 0.1℃-level temperature control for PPLN and ILTA and EDFA output power stability ≤0.5% by optimizing high-precision temperature control and power stabilization mechanisms.

[0018] Preferably, the core components of the system include a narrow linewidth laser, an erbium-doped fiber amplifier, an IQ quadrature optical signal modulator, and a periodically polarized lithium niobate nonlinear frequency doubling device.

[0019] A single-source dual-channel intelligent modulation frequency doubling optical system is applicable to the fields of atomic precision measurement, resource exploration, inertial navigation, and basic physics research in vehicle-mounted, ship-mounted, and airborne mobile vibration environments, with a volume ≤0.0378m³ and a weight ≤4.5kg.

[0020] Compared with existing technologies, this invention provides a single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture, which has the following beneficial effects:

[0021] This single-source, dual-channel intelligent modulation frequency doubling optical system, based on the ILTA-EDFA-IQ-PPLN integrated architecture, simultaneously provides both a high-stability, narrow-linewidth laser and a high-power, tunable laser through its "single-source, dual-channel" topology design, significantly enhancing the system's functional flexibility. This design allows the system to adapt to various scenarios in atomic detection, such as cold atom interferometry, atom cooling trapping, and atom excitation detection, without requiring multiple additional laser systems, thus reducing operating costs and complexity.

[0022] This single-source dual-channel intelligent modulation frequency doubling optical system, based on the ILTA-EDFA-IQ-PPLN integrated architecture, has achieved significant progress in integration, reducing its volume to 0.0378 m³ and weight to ≤4.5 kg. This represents an over 80% reduction in volume and weight compared to traditional systems, fully meeting the installation requirements of mobile platforms (such as vehicle-mounted, ship-mounted, and airborne systems). Simultaneously, the system's intelligent main control unit enables automatic power-on calibration, automatic fault warning, and remote parameter control, allowing even non-professionals to perform basic operations, greatly improving maintenance convenience. Fault location time is reduced to ≤30 minutes, significantly shorter than traditional systems (MTTR≥4h), significantly improving system availability and maintenance efficiency.

[0023] This single-source, dual-channel intelligent modulation frequency doubling optical system, based on an integrated ILTA-EDFA-IQ-PPLN architecture, demonstrates outstanding performance in its core indicators: EDFA output power stability ≤0.5%, PPLN and ILTA temperature control accuracy ≤0.1℃, and 780nm laser frequency doubling efficiency ≥45%. Its overall performance reaches the advanced level of similar international products. Furthermore, all core components of the system (such as the ILTA, EDFA, IQ modulator, and PPLN) are domestically produced, ensuring independent control of the supply chain. This approach not only reduces system costs but also facilitates later maintenance and upgrades, improving the system's long-term stability and competitiveness. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the process of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention.

[0025] Figure 2 This is a flowchart illustrating the optical path execution subsystem of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention.

[0026] Figure 3 This is a flowchart illustrating the electrical control management subsystem of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention.

[0027] Figure 4 This is a schematic diagram of the structure of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention;

[0028] Figure 5 This is a schematic diagram of the optical path of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention.

[0029] Figure 6 This is a logic block diagram of the electrical control system of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention.

[0030] Figure 7 This is a schematic diagram of the system structure packaging of the single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture proposed in this invention. Detailed Implementation

[0031] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0032] Example:

[0033] like Figures 1-7 As shown, one embodiment of the present invention proposes a system that adopts an integrated design of "optical path-electronic control-structure," specifically including an optical path execution subsystem, an electronic control management subsystem, and a structure packaging subsystem. The optical path execution subsystem adopts a "single-source dual-channel" optical path topology, comprising a narrow-linewidth laser (ILTA, model PHX-CFM-C21-10-6-1-0-0, output wavelength 1560.488±0.002nm, linewidth ≤3kHz), a first erbium-doped fiber amplifier (EDFA, model AMPB-S-09-00-28-P, output power 28dBm), a second EDFA (model AMPB-S-13-10X-20-P, output power 20dBm), and a third EDFA (model...). The system consists of an AMPB-S-15-00-37-P (output power 37dBm), two IQ quadrature optical signal modulators (model 40G-IQ-XT, supporting QPSK, QAM, OFDM and CS-SSB modes, carrier sideband suppression ratio ≥20dB, modulation bandwidth >20GHz), two periodically polarized lithium niobate nonlinear frequency doubling devices (PPLN, model PPLN-RWG-SHG1560-P8-P4-H, frequency doubling efficiency ≥40%), and multiple beam splitters (10 / 90, 1 / 99 splitting ratio). This subsystem is used to generate and control the conversion of 1560nm band laser to 780nm band laser.

[0034] The electrical control management subsystem includes an intelligent main control unit (core chip SAMV71Q21BAAB + MCUSTM32F373CCT6) and an integrated power supply unit (power chip TPSM63610RDFR, input DC 24~32V, multiple outputs DC12V, 5V, ±15V and 3.3V). The intelligent main control unit realizes intelligent control of each component in the optical path execution subsystem, and the integrated power supply unit is responsible for power supply management.

[0035] The structural packaging subsystem integrates all optical, electronic, and control components into a standardized metal package no larger than 300mm × 280mm × 45mm, achieving three-dimensional spatial optimization through a high-density optoelectronic hybrid PCB and a customized heat dissipation structure. Key components, such as the narrow-linewidth laser, employ a two-stage vibration-resistant mounting design (device-level shock-absorbing bracket + substrate-level damping gel). The system achieves a volume ≤0.0378m³ and a weight ≤4.5kg, meeting the installation requirements of mobile platforms. In the application of a vehicle-mounted atomic gravimeter, the system successfully outputs a high-stability 780nm laser (36mW power, linewidth ≤3kHz, frequency drift ≤1MHz / h) and a high-power 780nm laser (2W power, single-sideband modulation mode). The EDFA output power stability is ≤0.5%, and the PPLN and ILTA temperature control accuracy is ≤0.1℃. The overall performance of the system reaches the advanced level of similar international products.

[0036] In this invention, the "one-source dual-channel" architecture of the optical path execution subsystem is specifically implemented as follows: First channel (high-stability frequency doubling channel): The 1560nm laser output from the narrow-linewidth laser is pre-amplified by the first EDFA and then directly converted into a high-purity 780nm laser output through the first PPLN frequency doubling device. This channel has a simple optical path, avoids phase noise introduced by modulation, and is suitable for applications with extremely high requirements for long-term frequency stability, such as clock transition detection in atomic systems.

[0037] The second channel (modulated and high-power channel): A first IQ modulator and second and third EDFAs are integrated into the pre-amplified 1560nm laser path to achieve complex modulation and high-power amplification of the laser signal. Finally, it is converted into a modulated 780nm laser output through a second PPLN frequency multiplier. This channel is suitable for atomic cooling and trap-borne applications.

[0038] The system successfully achieves dual-channel output from a single source. The first channel outputs a highly stable 780nm laser, while the second channel outputs a modulated 780nm laser, meeting the needs of different application scenarios.

[0039] In this invention, the intelligent main control unit of the electrical control management subsystem further includes: a multi-variable collaborative control algorithm module: automatically calculating and setting the optimal combination of narrow-linewidth laser power, pump current of each stage amplifier, and frequency multiplier temperature based on the target output power to achieve a balance between energy efficiency and performance; a system-wide status monitoring module: collecting and analyzing optical power, PPLN temperature, and pump status parameters of each node in real time to ensure stable system operation; and an embedded protection mechanism module: executing preset protection algorithms, including but not limited to amplifier pump shutdown in case of no light, PPLN temperature exceeding tolerance alarm and power reduction, and output power closed-loop stabilization to prevent damage to core components. The system achieves intelligent control, automatically adjusting parameters according to the target output power, monitoring system status in real time, and responding rapidly in abnormal situations to ensure stable system operation.

[0040] In this invention, the structural packaging subsystem adopts an extremely compact packaging design, integrating all optical, electronic, and control components into a standardized metal package with dimensions not exceeding 300mm × 280mm × 45mm. Key components, such as the narrow-linewidth laser, employ a two-stage vibration-resistant mounting design to ensure the system's stability and reliability in mobile vibration environments. The system is small in size, lightweight, and exhibits excellent vibration resistance, meeting the application requirements of vehicle-mounted, ship-mounted, and airborne mobile vibration environments.

[0041] In this invention, the IQ modulator in the second channel supports multiple digital modulation modes, including but not limited to QPSK, QAM, OFDM, and special modulation modes such as CS-SSB. The modulation mode can be flexibly switched through intelligent main control unit settings to meet the needs of different application scenarios. The modulator carrier sideband rejection ratio is ≥20dB, and the modulation bandwidth is >20GHz, ensuring the accuracy and stability of the modulated signal. The system realizes complex modulation of laser signals, with flexible and adjustable modulation modes to meet the differentiated modulation requirements of laser signal amplitude and phase during atomic interference.

[0042] In this invention, the second channel outputs embedded monitoring light after each of the two IQ modulator nodes, and the quality of the modulated signal is monitored in real time by a photodetector. The intelligent main control unit dynamically adjusts the modulator bias point based on the feedback information from the monitoring light, ensuring the accuracy and stability of the modulated signal. The system achieves real-time feedback control of the modulated signal, improving modulation accuracy and stability, and meeting the requirements of high-precision atomic measurements.

[0043] In this invention, the system also includes a full-link system protection mechanism, which monitors overpower, overtemperature, optical path offset, and device malfunctions in real time through an intelligent main control unit, and executes preset protection algorithms, such as amplifier pump shutdown when there is no light, PPLN temperature over-tolerance alarm and power reduction, and output power closed-loop stabilization, to prevent damage to core components.

[0044] The system has a comprehensive protection mechanism that can respond quickly in abnormal situations, ensuring the safety of core components and improving the system's reliability and lifespan.

[0045] In this invention, the system optimizes the high-precision temperature control and power stabilization mechanism, employing high-precision TEC temperature control technology to achieve 0.1℃-level temperature control for the PPLN and ILTA. Simultaneously, the intelligent main control unit monitors and adjusts the EDFA output power in real time, ensuring output power stability ≤0.5%. This high-precision temperature control and power stabilization guarantee the long-term stability of core laser parameters, improving the accuracy and reliability of atomic precision measurements.

[0046] In this invention, the core components of the system include a narrow linewidth laser (ILTA), an erbium-doped fiber amplifier (EDFA), an IQ quadrature optical signal modulator, and a periodically polarized lithium niobate nonlinear frequency doubling device (PPLN). All core components are domestically sourced, ensuring a self-sufficient and controllable supply chain. The system achieves domestic substitution of core components, reducing system costs and improving the convenience of later maintenance and upgrades.

[0047] This single-source, dual-channel intelligent modulation frequency doubling optical system is suitable for applications in precision atomic measurement, resource exploration, inertial navigation, and fundamental physics research under mobile vibration environments, including vehicle-mounted, ship-mounted, and airborne systems. The system is compact (≤0.0378m³) and lightweight (≤4.5kg), featuring high integration, intelligence, and high reliability. The system has demonstrated excellent performance in application tests under various mobile vibration environments, successfully achieving functions such as precision atomic measurement, resource exploration, and inertial navigation, thus verifying its practicality and reliability.

[0048] Finally, it should be noted that the basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification, and therefore remain within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe embodiments of this specification. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined. Moreover, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods of this specification.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A single-source dual-channel intelligent modulation frequency doubling optical system based on the ILTA-EDFA-IQ-PPLN integrated architecture, characterized in that, include: The optical path execution subsystem adopts a "one-source dual-channel" optical path topology architecture, which includes a narrow linewidth laser, at least one erbium-doped fiber amplifier, at least one IQ orthogonal optical signal modulator, at least one periodically polarized lithium niobate nonlinear frequency doubling device, and multiple beam splitters for generating and controlling the conversion of 1560nm band laser to 780nm band laser. The electrical control management subsystem, including the intelligent main control unit and the integrated power supply unit, is used to realize the intelligent control and power supply management of each component in the optical path execution subsystem; The structural encapsulation subsystem integrates all components of the optical path execution subsystem and the electronic control management subsystem into a standardized metal package, achieving high integration and vibration resistance design.

2. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 1, characterized in that, The "single-source dual-channel" architecture of the optical path execution subsystem specifically includes: The first channel is a high-stability frequency doubling channel, which directly converts the 1560nm laser output from the narrow linewidth laser into a high-purity 780nm laser output after pre-amplification through a PPLN frequency doubling device, and is used for applications with extremely high requirements for long-term frequency stability. The second channel is a modulated and high-power channel. It integrates an IQ modulator and a multi-stage fiber amplifier on the pre-amplified 1560nm laser path to achieve complex modulation and high-power amplification of the laser signal. It is then converted into a modulated 780nm laser output through a PPLN frequency multiplier device.

3. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 1, characterized in that, The intelligent main control unit of the electronic control management subsystem further includes: The multivariable collaborative control algorithm module is used to automatically calculate and set the optimal combination of narrow linewidth laser power, pump current of each stage amplifier, and frequency multiplier temperature based on the target output power. The system-wide status monitoring module is used to collect and analyze the optical power, PPLN temperature, and pump status parameters of each node in real time. The embedded protection mechanism module executes preset protection algorithms, including but not limited to amplifier no-light pump shutdown, PPLN temperature over-tolerance alarm and power reduction, and output power closed-loop stabilization.

4. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 1, characterized in that, The structure packaging subsystem adopts an extremely compact packaging design, with all optical, electronic and control components integrated into a standardized metal package with a size not exceeding 300mm×280mm×45mm, and key components such as narrow linewidth lasers adopt a two-stage vibration-resistant mounting design.

5. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 2, characterized in that, The IQ modulator in the second channel supports multiple digital modulation modes, including but not limited to QPSK, QAM, OFDM, and special modulation modes such as CS-SSB, and has a carrier sideband rejection ratio ≥20dB and a modulation bandwidth >20GHz.

6. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 2, characterized in that, The second channel leads out embedded monitoring light after each of the two IQ modulator nodes for real-time feedback control, ensuring the accuracy and stability of the modulated signal.

7. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 1, characterized in that, The system also includes a full-link system protection mechanism to monitor and respond quickly to overpower, overtemperature, optical path offset, and device malfunctions in real time, in order to prevent damage to core components.

8. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 1, characterized in that, The system achieves 0.1℃-level temperature control for PPLN and ILTA and ≤0.5% output power stability for EDFA by optimizing high-precision temperature control and power stabilization mechanisms.

9. The single-source dual-channel intelligent modulation frequency doubling optical system according to claim 1, characterized in that, The core components of the system include a narrow linewidth laser, an erbium-doped fiber amplifier, an IQ quadrature optical signal modulator, and a periodically polarized lithium niobate nonlinear frequency doubling device.

10. The single-source dual-channel intelligent modulation frequency doubling optical system according to any one of claims 1 to 9, characterized in that, The system is suitable for atomic precision measurement, resource exploration, inertial navigation, and basic physics research in mobile vibration environments such as vehicle-mounted, ship-mounted, and airborne environments, and has a volume ≤0.0378m³ and a weight ≤4.5kg.

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