Current Issue
2025 Vol. 49 No. 2
2025, 49(2): 159-165.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.001
Abstract：
In order to improve the phase measurement sensitivity of photonic optical interferometers in photon loss scenarios, a theoretical study of the sensitivity of photon coincidence measurement under photon loss has been carried out using a typical twin-Fock state as an input of a photonic Mach-more+
2025, 49(2): 166-174.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.002
Abstract：
In order to solve the problems of low detection performance, large number of model parameters and difficult deployment in edge devices of the existing indoor vision aided algorithm, the YOLOv7-tiny network was improved and a new YOLOv7-ghost network model was proposed. Firstly, aiming amore+
2025, 49(2): 175-179.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.003
Abstract：
To achieve online rapid detection of steel wire meter liquid adjustment, filter paper enrichment was used to verify the feasibility of the enrichment method for steel wire meter liquid adjustment. On this basis, the influence of pH value on the detection results of laser induced breakdown spectroscomore+
Investigation on the process and mechanism of laser enhanced surface absorptivity of stainless steel
2025, 49(2): 180-187.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.004
Abstract：
In order to enhance the absorptivity of stainless steel surface in infrared band, nanosecond fiber laser was used to modify the morphology of stainless steel plate surface. The influences of process parameters on the geometrical dimensions of micro-crater, surface roughness and blackness wmore+
2025, 49(2): 188-194.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.005
Abstract：
In order to prepare wear-resistant titanium-based coating, a Ti-Al-N wear-resistant titanium-based coating was prepared on TC4 surface by laser cladding. The phase composition, microstructure evolution and hardness of the coating under different laser powers were observed and analyzed, andmore+
2025, 49(2): 195-202.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.006
Abstract：
Raman amplification can realize the distributed amplification of optical signals in optical fiber links, and has excellent amplification performance in terms of high gain and low noise, which is one of the key technologies in long-distance optical fiber communication systems. In recent years, in order tmore+
2025, 49(2): 203-209.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.007
Abstract：
In order to compare the application effect of two low altitude wind shear alerting algorithms of combined shear algorithm and the regional divergence algorithm on wind light detection and ranging (LiDAR) in complex wind fields, 15 wind shear cases caused by 3 typical weather processes omore+
2025, 49(2): 210-215.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.008
Abstract：
Point cloud noise reduction is crucial to the accuracy of light detection and ranging(LiDAR) imaging systems. In order to reduce the noise caused by receiver, multipath effect, external interference and atmospheric disturbances, a radius filtering method based on genetic algorithm was used for noismore+
2025, 49(2): 216-222.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.009
Abstract：
Accurate 3-D understory information obtained by terrestrial laser scanning usually requires the registration of multi-station scanning point cloud data. In order to reduce the need for additional equipment or functions when collecting forest laser scanning data, a forest laser scanning data registrmore+
2025, 49(2): 223-226.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.010
Abstract：
In order to construct a unidirectional traveling-wave ring resonator or non-planar ring resonator that utilizes the magneto-optical effect of the laser gain medium itself without additional magneto-optical crystals, so as to meet the application requirements of preparing continuous wave single-frequemore+
2025, 49(2): 227-232.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.011
Abstract：
For the photoelectric detection technology of music signal, an improved harmonic reconstruction algorithm was proposed to reduce the system noise while retaining the timbre of music. Firstly, the priori signal-to-noise ratio of the signal was calculated, and Wiener filter for noise reduction procemore+
2025, 49(2): 233-238.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.012
Abstract：
To solve the problem of large overshooting and long time needed for stabilization of fast steering mirror (FSM) under traditional proportion-integration-differentiation (PID) control, adaptive fuzzy algorithm was introduced to optimize the control and improve the control performance. Based more+
2025, 49(2): 239-244.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.013
Abstract：
In order to solve the problem of semiconductor laser wavelength drift leading to output wavelength deviation, a dual-loop distributed feedback (DFB) laser two-stage temperature control system was proposed. Based on the internal temperature control system of the semiconductor laser, an exmore+
2025, 49(2): 245-249.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.014
Abstract：
Laser diode were easily affected by temperature, vibration and other external factors during free-running operation, and the frequency stability of the output laser was difficult to meet the technical requirements of the fields such as quantum precision measurement, high-precision spectroscopy amore+
2025, 49(2): 250-257.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.015
Abstract：
The emergence of photoacoustic imaging has expanded the application of biomedical imaging technology in cells, tissues, and living organisms to monitor a variety of physiological processes in complex internal environments. Photoacoustic imaging is essentially 3-D imaging, involving three spatialmore+
2025, 49(2): 258-262.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.016
Abstract：
In order to enhance the detection sensitivity of aerosol particle spectrometers, a method that two photodetectors were used to separately detect the side-scattered light of small particles and the forward-scattered light of large particles was employed. A miniaturized high-sensitivity aerosol particlmore+
2025, 49(2): 263-270.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.017
Abstract：
Broken strand damage of the high-voltage cable may be caused due to environmental problems in use. And the existing detection technology cannot meet the requirements for detecting the broken strand damage of the part of the cable wrapped by the clamp on the high-voltage piezoelectrimore+
2025, 49(2): 271-277.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.018
Abstract：
The current aircraft inlet pipe leakage monitoring system primarily employs eutectic salt electric superheat detectors as temperature sensing units. A linear array optical fiber sensor probe was investigated for detecting leaks in the aircraft inlet pipe, aiming to overcome the existing technical bottlemore+
2025, 49(2): 278-283.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.019
Abstract：
To solve the problem of "kiss bonding" and "weak bonding" which cannot be detected by conventional nondestructive testing technology, a self-designed variable pulse width Nd ∶YAG laser was selected. Three surface treatment methods and two kinds of adhesives were used to prepare the bonmore+
2025, 49(2): 284-288.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.020
Abstract：
To achieve a laser capable of functioning in applications such as distance measurement and target designation, two methodologies were primarily utilized: The simulation analysis of the ray transfer matrix for the telescope cavity and the theoretical calculation of steady-state thermal resistance to more+
2025, 49(2): 289-295.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.021
Abstract：
In the seam tracking based on structured light vision, strong noise such as arc and spatter generated in the welding process would greatly reduce the visibility of the weld, resulting in tracking failure. In order to solve this problem, a seam tracking algorithm based on the improved kernel correlatiomore+
2025, 49(2): 296-300.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.022
Abstract：
The refractive index structure constant, as one of the key indicators characterizing atmospheric turbulence intensity, is measured by the temperature pulsation meter. Research on its measurement uncertainty is of significant importance. Based on the principle of the temperature pulsatimore+
2025, 49(2): 301-306.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.023
Abstract：
There are a huge demand for fast and efficient demolition workers in rescue operations. Laser cutting showed great potential because of its characteristics of non-contact, high speed, and high precision. In order to explore the application of laser cutting technology in the rescue and demolitimore+
2025, 49(2): 307-312.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.024
Abstract：
In order to improve the quality and efficiency of laser paint removal, acrylic paint layer was sprayed on the surface of 2024 aluminum alloy and cleaning test was carried out. The surface morphology, element energy spectrum, and roughness of the sample after paint removal were observed anmore+
Research on power monitoring and regulation method of domestic embedded FPC laser drilling equipment
2025, 49(2): 313-316.
DOI: 10.7510/jgjs.issn.1001-3806.2025.02.025
Abstract：
In order to make the laser power of flexible printed circuit (FPC) board laser drilling equipment in domestic industry real-time monitoring, stable and dynamic adjustment, an embedded power monitoring and automatic control method based on domestic GD32 chip as the core was adopted. Themore+
