The invention discloses an integral wired-
wireless optical fiber asymmetric full-duplex
access method and
system. A light with the frequency being f0 is divided into two beams; one beam is modulated by a high-speed
QAM (
Quadrature Amplitude Modulation)
millimeter-wave
signal single side band with the frequency being fRF to generate a light carrier OLO1 (Optical Line Output 1) and a
signal side band BBD with same polarization; and the other beam is inhibited and modulated by a
local oscillator carrier with the frequency being fRF to generate an OLO2 with the same frequency as the BBD, after the OLO2 is orthogonal and combined with the OLO1, excess optical frequency components are filtered, and a downward infusion optical
signal is generated. The infusion optical signal is transmitted to a
base station through
optical fiber, and can provide wired or
wireless access. When the
base station is accessed in a wired manner, a
wavelength interpolation device separates the OLO2, the BBD from the OLO1, the OLO2 is subjected to coherent
demodulation so as to obtain a downlink
baseband signal, and the OLO1 carries an uplink low-speed signal and is back to a central
station through the
optical fiber; and when the
base station is wirelessly accessed, a
polarization beam splitter separates the OLO1, the BBD and the OLO2, the OLO1 is an optical
millimeter-wave signal and is converted to electrical
millimeter-wave through a photoelectric
detector, and the OLO2 carries an uplink low-speed millimeter-wave signal and is back to the central
station through the optical
fiber, so that wired or
wireless asymmetric full-duplex access is realized.