Patent ID: 6043921
Filing Date: 2000-03-28
Classification: H04B

Abstract:
An optical device for fading-free reception of optical phase signals comprising:means for generating a composite local optical signal comprising two phase-locked spatially orthogonal optical signals of different frequencies wherein said composite local optical signal uses first means for generating a first local optical signal having a first distinct frequency and second means for generating a second local optical signal having a second distinct frequency and means for phase locking said first local optical signal and said second local optical signal;means for receiving an external optical signal;means for interfering said composite local optical signal with said external optical signal thereby producing a heterodyne interference optically connected to said composite generating means and said optical signal receiving means;a photodetector optically connected to said interference means for detecting said heterodyne interference and producing a composite radio-frequency wave;an electronic decoder electronically connected to said photodetector; andan electronic differentiation and cross multiplication module electronically connected to said electronic decoder.