Abstract
The thermal stability of optical antennas is a key parameter determining the performance of satellite optical communication links. The effects of uniform temperature changes on the performance of a Cassegrain optical antenna are discussed. In addition, a simple theoretical model is proposed to describe the defocusing distance and wavefront aberration (power) as a function of temperature. Through the theoretical model, the thermal stability can be quickly assessed in the optical design stage. The alignment data and thermal experimental results are consistent with the theoretical model.
Highlights
Satellite laser communication links have several advantages over traditional radio frequency systems, such as extremely high-data rates, small size and mass, low-power consumption, and strong security.[1]
The SOUT laser communication terminal developed by ESA requires a thermal control accuracy of Æ2.5°C at all times and a short temperature change of less than 0.5°C.7
The Cassegrain optical antenna of the lunar laser communication demonstration developed by NASA requires a thermal control accuracy of Æ1°C.8
Summary
Satellite laser communication links have several advantages over traditional radio frequency systems, such as extremely high-data rates, small size and mass, low-power consumption, and strong security.[1]. The optical antenna is a key component of the laser communication system It is an afocal telescope with both receiving and transmitting functions. Temperature variations can cause a defocus of the signal and beacon beam. The SOUT laser communication terminal developed by ESA requires a thermal control accuracy of Æ2.5°C at all times and a short temperature change of less than 0.5°C.7. The Cassegrain optical antenna of the lunar laser communication demonstration developed by NASA requires a thermal control accuracy of Æ1°C.8. These control strategies will result in an increase in power consumption and volume. A theoretical model that can quickly assess the thermal stability of the optical antenna in the optical design stage is developed, the corresponding simulation is carried
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