Microchannel photomultiplier tube with composite waveguide anode for space optical communication

Abstract

A microchannel photomultiplier tube with composite waveguide anode for space optical communication belongs to the field of optoelectronic technology. The prior art requires the use of three optical antennas, which significantly increases the volume and weight of the optical transceiver, complicates the structure, and makes installation and adjustment very difficult. The components of the present invention include a window, a photocathode, a microchannel plate, and an anode. The microchannel plate has multiple levels, and a voltage with the same direction is applied between the photocathode, the microchannel plate of each level, and the anode, and the photocurrent is output by the anode; It is characterized in that the anode is composed of a transmissive anode, an anode microchannel plate, and a position-sensitive anode, the transmissive anode and the position-sensitive anode are respectively located on the front and back of the anode microchannel plate, and the electron beam focusing electrode is located on the last stage of the microchannel plate Between the transmissive anode and the transmissive anode, the laser communication signal photoelectric current is output from the transmissive anode, and the laser communication positioning photoelectric current is output from the position-sensitive anode. Combining fine tracking and communication into one reduces 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...

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