• Acta Photonica Sinica
  • Vol. 51, Issue 10, 1032003 (2022)
Yuchi ZHANG1、2、*, Jinshou TIAN1、3, Yanhua XUE1, Zhibing LI1, Shaohui LI1, Junfeng WANG1, Baiyu LIU1, Guilong GAO1, Ping CHEN1, Xing WANG1, and Wei ZHAO1、2
Author Affiliations
  • 1Key Laboratory of Ultra⁃fast Photoelectric Diagnostics Technology,Xi'an Institute of Optics and Precision,Chinese Academy of Sciences,Xi'an 710119,China
  • 2University of Chinese Academy of Sciences,Beijing 100049,China
  • 3Collaborative Innovation Center of Extreme Optics,Taiyuan 030000,China
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    DOI: 10.3788/gzxb20225110.1032003 Cite this Article
    Yuchi ZHANG, Jinshou TIAN, Yanhua XUE, Zhibing LI, Shaohui LI, Junfeng WANG, Baiyu LIU, Guilong GAO, Ping CHEN, Xing WANG, Wei ZHAO. High-gain Ultra-small Streak Camera and Its Integrated Control System[J]. Acta Photonica Sinica, 2022, 51(10): 1032003 Copy Citation Text show less

    Abstract

    As a diagnostic instrument with ultra-high temporal and spatial resolution and spectral resolution, the streak camera is widely used in basic research fields such as physics, life sciences, and materials science, as well as in national strategic fields such as detonation physics, lidar, and inertial confinement fusion. Aiming at the requirements of airborne lidar for miniaturized, high-sensitivity, high-gain, and high spatiotemporal resolution streak camera, a high-brightness-gain compact streak camera and its new integrated control system are developed.Compared with the general picosecond visible light streak camera, the volume and weight of the camera are reduced by more than 2/3. The selected streak camera adopts the theoretical simulation research of cathode semiconductor and the method of optimizing the process to greatly improve the sensitivity of the cathode. Using a slit acceleration grid improves the photoelectron transmittance, enhances the photoelectron energy to give the fluorescent screen higher luminous efficiency, and optimizes the cathode process to improve the brightness gain. The streak image tube has the characteristics of high sensitivity, large detection field, high brightness gain, and high temporal and spatial resolution.Starting from the principle and control requirements, combined with the theoretical analysis of the defects of the active control system, a new type of high-integration control system is developed for the camera, which fully eliminates the low integration, poor reliability and compatibility of the previous version. defect. The hardware of the new control system adopts the design method of modularization and function reuse, and the PCB adopts the multi-layer board design. Compared with the current version, the degree of integration is increased by 2.36 times to achieve multi-device compatibility. The bottom layer of the system hardware is divided into main control module, power supply module, A/D module, D/A module, digital I/O and extended scan switching module: the main control module takes STM32F107VCT6 as the core and is responsible for the information between each module and the host computer Interaction; the power supply module is divided into a high-voltage power supply part and a low-voltage power supply part, which provide corresponding voltages for the stripe tube and each element of the circuit; the A/D module takes ADS1256 as the core, adds anti-static protection and digital-analog isolation to entirely eliminate noise interference, and uses SPI The protocol communicates with the host computer; the D/A module takes DAC8534 as the core to control the output of analog devices such as MCP and high-voltage power supply; the digital I/O and expansion scan switching module use the microcontroller GPIO as the control, and the 24 pins programmable interface supports function multiplexing. The PC-side visualization system realizes human-computer interaction and has functions such as camera control, instant feedback of collected images and data, and operation logs. The interface is concise and optimized, which greatly enhances the operability and maintainability of the camera.Finally, the streak tube static test system is used to test the parameters of the streak image tube: the cathode integral sensitivity is 268 μA/lm, the brightness gain is 20.1, and the time resolution is 36 ps; femtosecond laser, F-P etalon, DG645 delayer, oscilloscope, etc. built a dynamic test system for streak camera, and tested the static/dynamic spatial resolution, time resolution, control system function, etc. of the whole machine. The static spatial resolution is higher than 26 lp/mm, the full-screen scanning time is 600 ps, and the functions of control, monitoring and information exchange of the control system are normal. The developed streak camera works well in the laser radar and Inertial Confinement Fusion (ICF) picosecond laser targeting experiments.
    Yuchi ZHANG, Jinshou TIAN, Yanhua XUE, Zhibing LI, Shaohui LI, Junfeng WANG, Baiyu LIU, Guilong GAO, Ping CHEN, Xing WANG, Wei ZHAO. High-gain Ultra-small Streak Camera and Its Integrated Control System[J]. Acta Photonica Sinica, 2022, 51(10): 1032003
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