Micro-channel photomultiplier with composite waveguide anode for spatial optical communication

Abstract

The invention discloses a micro-channel photomultiplier with a composite waveguide anode for spatial optical communication, and belongs to the field of photoelectric technology. The prior art needs to use three optical antennas, thereby enabling the size and weight of an optical transmitter and receiver to be increased remarkably, enabling the structure to be complex, and enabling the installation and debugging difficulty to be great. The micro-channel photomultiplier consists of a window, a photoelectric cathode, a micro-channel plate, and an anode, wherein the micro-channel plate has a plurality of stages. Voltages in the same direction are applied among the photoelectric cathode, all stages of the micro-channel plate and the anode, and a light current is outputted through the anode. The micro-channel photomultiplier is characterized in that the anode consists of a transmitting-type anode, an anode micro-channel plate, and a position-sensitive anode; the transmitting-type anode and the position-sensitive anode are respectively located on the front and back surfaces of the anode micro-channel plate; an electron beam is focused between the last stage of the micro-channel plate and the transmitting-type anode; the transmitting-type anode outputs a laser communication signal light current; and the position-sensitive anode outputs a laser communication positioning light current. The micro-channel photomultiplier enables the precise tracking and communication to be integrated into one body, thereby reducing one optical antenna.

Description

technical field [0001] The invention relates to a microchannel photomultiplier tube with composite waveguide anode for space optical communication, belonging to the field of optoelectronic technology. Background technique [0002] In the process of space laser communication, in order to achieve precise alignment on the order of milliradians or even microradians, the laser communication optical transceiver used adopts a two-stage composite APT system (acquiring tracking pointing, capture tracking alignment). The so-called two-level composite APT system includes two parts: rough tracking and fine tracking. The rough tracking part is a CCD telephoto automatic tracking system, and the fine tracking part is a high-speed tracking system with PZT (rapid tilt mirror) and 4QD (four-quadrant detector). Coarse tracking completes the coarse alignment of the beacon light, so that the target of the optical transceiver is maintained in the center of the CCD field of view, thereby ensuring...

AI Technical Summary

Problems solved by technology

[0003] Since it is necessary to set up a two-stage composite APT system, the reality that three optical antennas exist at the same time in the laser communication optical transceiver can hardly be changed, which makes the size and weight of the optical transceiver significantly increase, and the structure of course also becomes complicated. The installation of these optical antennas Adjustment, including the fine adjustment of the three optical axes, is very difficult

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