| 摘要 |
PURPOSE:To reduce the consumed electric energy while reducing the weight of a satellite mount device by collecting the sun ray and using the ray as the light source for the inter-satellite optical communication system. CONSTITUTION:The wavelength of the sun ray collected by a tracking light collection optical system 12 collecting the sun ray in tracing the sun 11 is selected by an optical filter 13 and the ray is radiated to a YAG laser 17 as the light source laser of the optical communication carrier light as a pumping light. The light generated from the YAG laser 17 is preferably pulsized and a double or triple harmonic processing is applied as required by a harmonic generator 18. Then the light subject to wavelength conversion is modulated by using a signal from a signal source 15 in the modulator 16 and radiated. When the satellite comes behind the shadow of the earth, no sun ray is obtained, but this time is not much in a year, a standby power supply on the satellite is used in this case. Thus, the weight of the satellite mount device is reduced and the electric consumed energy is decreased. |
