Patent ID: 6501573
Filing Date: 2002-12-31
Classification: H04B

Abstract:
An apparatus for monitoring the qualities of an optical signal using a clock amplitude of the optical signal in optical transmission systems or photoelectric transmission networks, comprising:an optical signal processing means for separating a portion of an optical signal from the optical signal in transmitting through an optical fiber and converting the separated portion into a signal having clock components; a narrow optical detection means for converting the optical signal outputted from said optical signal processing means into electrical signals and then extracting only clock frequency components from the electrical signals to output the extracted components as sine waves; a super high frequency (SHF) rectifying means for converting the output of said optical detection means into direct current (DC) signals; and a voltage detection means for measuring the magnitude of the direct current signals outputted from said SHF rectifying means; and a processing means for monitoring the qualities of the optical signals by using the magnitude of DC voltage outputted from said voltage detection means.