The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2004
Filed:
Feb. 14, 2001
National Science Council, Taipei, TW;
Abstract
A coherent optical communication receiver of a satellite optical communication system, having a telescope, an automatic frequency control circuit and a frequency shift keying demodulator. The automatic frequency control circuit has a local oscillating laser, a light polarization controller, a optical coupler, a photo-detector, a microwave matching network, a microwave mixer, a frequency discriminator and a low pass frequency filter. The coherent optical communication receiver can receive a frequency control signal of a distant laser signal to perform a heterodyne receiving between the emitter and the receiver distant away from each other. With the consideration of the decay of vibration and atmosphere, the quality of the satellite optical communication can still be maintained. The structure and fabrication of the receiver are simple with a low fabrication cost, and the receiver is suitable for being applied to high speed satellite communication system.