As a core technology in optoelectronics, optoelectronic integration technology is currently undergoing rapid development, progressing from discrete devices towards highly integrated and multifunctional solutions. Key technologies encompass heterogeneous integration of diverse materials on the same substrate, heterostructured integration of different device architectures, and the packaging of integrated systems. Building upon the fundamental concepts and development overview of optoelectronic integration technology, its key development characteristics are analyzed systematically. Analysis reveals that the technology exhibits a pronounced trend towards multimaterial fusion, continuous enhancement of integration levels, and continuous expansion of application fields, evident in aspects such as materials, device design and fabrication processes. Finally, addressing the current technological bottlenecks and research status within the field, the future development directions and potential breakthroughs for optoelectronic integration technology are presented.

The focusing and transmission characteristics of coherent laser arrays are studied. A physical model of coherent laser arrays focused through lenses is established based on scalar diffraction theory, and the variation patterns of transverse mode field distributions are analyzed through numerical simulations. An aperture filtering method based on the diameter of first-order dark fringe rings in the far-field is proposed, which effectively eliminates side lobes using focusing lenses and successfully extracts the central main lobe for transmission analysis. The transmission transformation characteristics of different array geometries such as circular, hexagonal and square, and arrangements through various focal length lenses are further studied. The beam quality factor M2 for coherent array lasers is defined as the ratio of the focal depth of the fundamental Gaussian beam to that of the coherent array beam. The study revealed that when employing circular and hexagonal array configurations, the M2 factor of focused coherent array lasers becomes less than 1, exceeding the electric field diffraction limit.

The pulse establishment process, the influence of pump energy and pulse width on the output laser is analyzed, and a gain-switched Fe:ZnSe laser pumped by an E-O Q-switched Cr, Er:YSGG laser with a wavelength of 2.79 m and a repetition frequency of 2 Hz at room temperature is also designed. The variation of output laser pulse with pump energy is obtained, and it shows that the number of Fe:ZnSe laser pulses increases from 1 to 7 as the pump energy increases from 10.6 mJ to 25.3 mJ. When multiple pulses are generated, the amplitude of adjacent pulses gradually decreases, while the pulse width and interval gradually increase. Due to multiple pulses, the pulse widths of the Fe:ZnSe laser increase compared with a single pulse, and the peak power of the laser increases slowly with energy. This study has a reference value on the peak power control of the gain-switched Fe:ZnSe laser, and also the laser applications.

The tunable laser sources play a crucial role in silicon-based optical chip screening, laser radar and intelligent sensing system with O-band tunable laser sources being particularly suitable for high-speed data center interconnections. The mechanical tunable laser source based on external-cavity feedback is an effective technical means to break through the limitation of the limited tuning range of the monolithically integrated diode laser source and effectively expand its tuning range. Three O-band tunable laser sources are developed, using the gain chip as the seed source, and feeds the laser beam satisfying the grating equation to the gain region of the gain chip through the blazed grating, and achieves the output results of about 100 nm tuning range with outstanding performance, absolute wavelength accuracy better than ±1.6 pm, wavelength stability better than 0.2 pm/1 h and power stability output better than 0.0020 dB/1 h, and the long-term output consistency is studied. The results show that with the excellent characteristics of the precision resonant cavity module and the wavelength locking module, there is great potential to achieve highly reproducible O-band tunable laser output.

According to the application requirements of 640×512 uncooled long-wave infrared detectors, a hybrid refractive-diffractive continuous zoom optical system with a focal length of 20~200 mm is designed using the dispersion characteristics of diffraction optical elements. The positive compensation structure is used to achieve 10× optical zoom, and the image quality is improved by introducing even aspherical and binary diffraction surfaces. The zoom curve analysis and image quality evaluation are performed according to the design results. The full field of view modulation transfer function at the spatial frequency of 40 lp/mm is greater than 0.3, closed to the diffraction limit, and the short focal end distortion control is less than 4%. The results show that the system has large relative aperture, good imaging quality and smooth zoom curve, and can be widely used in infrared continuous zoom thermal imager products.

Laser speckle is one of the main sources of noise in the measurement process of laser triangulation measurement, which significantly impacts the measurement uncertainty of triangulation measurement instruments. A triangulation measurement device taking two lasers with different wavelengths as the light sources is proposed to suppress the speckle phenomenon during testing and improve the measurement accuracy of the instrument. At first, the working principle of laser triangulation measurement and the relationship between speckle and the measurement uncertainty of the device are introduced. And then, the principle of using dual-wavelength illumination to suppress speckle and improve the accuracy of triangulation measurements is introduced, and the speckle suppression effects under different power ratios of light sources are analyzed. At last, lasers with wavelengths of 405 nm and 420 nm are used to conduct triangulation measurement experiment. Experimental results indicate that the method can reduce the measurement uncertainty of the theodolite. After illumination with a dual-wavelength light source, the instrument's testing uncertainty decreases from 0.52 m to 0.23 m. The measurement uncertainty can be reduced, which lays the technical groundwork for the development of higher precision laser triangulation instruments and possesses important practical value.

To solve the problem of the current device's narrow detection band, small size of the detected spot and low power, a common-aperture spot detection device is designed. The design content and results of the device in terms of hardware and software are introduced respectively. By adopting the common aperture of imaging units in three bands of near infrared, medium infrared and far infrared, and integrating laser range and point source detection, the effective detection of continuous and high frequency laser spot is achieved. By combining the image algorithms such as adaptive threshold segmentation and Zernike moment edge detection, the angular second level measurement of many parameters of the spot is realized. For near infrared imaging, medium infrared imaging and far infrared imaging units, the measurement error of spot position is 16.5″, 27.5″, 26.4″ respectively. The detection equipment has solved problems in multi band, large size, high power laser spot detection, effectively promoting the further development of laser measurement technology.

An online blind pixel detection and compensation method based on scene is proposed to address the blind pixel problem of infrared focal plane detectors in infrared imaging systems. At first, 3 criteria is used to rapidly screen suspected blind pixel targets, and then, the gradient discrimination method is used to confirm the suspected blind pixel, thereby blind pixel detection is achieved. After completing the blind pixel detection, neighborhood replacement algorithm is used to replace blind pixel and the blind pixel compensation is achieved. To verify the effectiveness of the method, simulation analysis is conducted using a constant temperature blackbody and actual scenarios. Simulation results verify that this method can achieve online blind pixel detection and compensation in infrared imaging system, and improve the quality of infrared imaging effectively.

To improve the tracking performance and ensure the designed effective bandwidth of a two-dimensional pointing mechanism, a composite control system integrating correction network and proportional-integral-differential (PID) is developed based on classical three-loop control theory, with its effective tracking bandwidth experimentally validated. At first, the actuator configuration and driving control logic of the pointing mechanism are elaborated on, and then, the system mathematical model is established and the control principle is analyzed, obtaining key performance parameters through simulation. In the experimental section, the testing platform configuration and methodology are introduced. Testing results demonstrate that the correction network-optimized PID control achieves high-precision fixed-point control within 0.3″ and significantly enhances the image closed-loop control bandwidth beyond 2.5 Hz, meeting all design specifications.

The ability of metal sticker of gather heat depends on the surface current distribution. The influence of metal sticker of gather heat should be taken into full consideration in the process of design and application, in order to adjust and control the heat. The characteristic of surface current of continuous metal sticker is fixed, so a variety of discontinuous sticker is designed and simulated. By analyzing and summarizing the intensity and the distribution of the surface current, the influence factors on the surface current of the discontinuous sticker from periodic and special-shaped hole structure design are discussed, which provides references for developing heat-dissipating and heat radiation metal sticker.

Low-deformation machining technology for thin-walled aluminum alloy parts is studies. While aluminum alloys has excellent properties such as high strength and hardness, thin-walled components are prone to deformation during machining. Five key factors contributing to deformation, including residual stress in the blank, machining stress, cutting forces, cutting heat and workpiece clamping are analyzed systematically. A multi-stage stress collaborative control method is proposed, integrating heat treatment at different machining stages, rational selection of processing equipment, clamping methods, cutting tools and parameters, and optimized machining paths to achieve low-deformation manufacturing. Prototyping results validate the applicability of the technical solution, providing theoretical guidance for formulating scientific and optimized machining processes, with significant potential for industrial promotion.

Based on the internal ballistics theory, the chamber pressure and the motion of the load after the ignition device being triggered is analyzed, and the detailed calculations and analysis are carried out. Using two typical structures as carriers, different forms of loads is loaded into the cavity, the ignition device with different charges is chosen as the initiating components for firing, the different output characteristics is formed, and the pressure exerted by the ignition device on the load and the variation law of the load motion velocity with time are calculated. Results show that as the amount of charges increases, the maximum pressure within barrel and the motion velocity of the load increase. The output characteristics can be controlled by loading different qualities of black powder and adjusting the formulation, and the launching initial velocity of the load is adjusted, thereby controlling the output characteristics of the ignition device is realized, which provide references for the practical application of ignition devices.

To explore the influence of milling-grinding processes on the surface damage layer of infrared silicon lenses and enhance the surface machining quality, a spatial motion trajectory model of abrasive grains in grinding tools is constructed. The removal mechanism of the surface damage layer during lens milling-grinding is systematically analyzed, and the key factors such as grinding wheel speed, workpiece rotation speed, axial feed rate of the grinding wheel and milling depth affecting surface machining quality are identified. Horizontal process experiments are designed, and orthogonal experimental methods are employed to validate the theoretical analysis. Results show that the degree of workpiece surface damage is positively correlated with machining radius, axial feed rate of the grinding wheel, and milling depth, while negatively correlated with workpiece rotation speed and grinding wheel speed. Optimizing process parameters can effectively reduce surface roughness, minimize surface shape errors, and improve the surface machining quality of infrared silicon lenses.

Addressing the issue of jamming caused by excessive deformation of the casing after actuation in sealed pyrotechnic actuators, a reliability design method for the casing wall thickness based on the stress-strength interference model is proposed. And a detailed calculation example for a typical sealed pyrotechnic actuator is provided. Using a validated simulation model, the functional relationship between the casing deformation after actuation and the casing wall thickness is calculated and fitted. The first-order second-moment method is employed for iterative computation to determine the design point for the mean wall thickness that corresponds to a given standard deviation and meets the reliability requirements. The results show that when the standard deviation of the casing wall thickness is 0.1 mm, the design point for the mean wall thickness is 1.34 mm. At this point, the reliability that the casing deformation after actuation does not exceed the clearance size between the casing and the mounting hole is 0.990 9, and the casing mass is reduced by approximately 7.7% compared to that designed by the conventional safely factor method. This method allows for adjustments by controlling both the mean and standard deviation of the casing wall thickness, offering significant technical and economic benefits.