An optical distributed antenna system (300, 400, 500) comprising: a head-end unit (302, 302a, 302b, 302c, 402); and a plurality of remote units (306-1...306-N, 406-1...406-N); characterized by further comprising a plurality of N point-to-point (P2P) fibers; wherein the HE unit is used to transmit downlink to the RUs, over the plurality of N P2P fibers, a plurality of modulated downlink λ 0 optical signals and a respective plurality of N continuous waves (CWs) of different wavelengths λ 1 -λN; and wherein each RU (306-1...306-N, 406-1...406-N) includes a reflective electro-absorption transceiver (REAT) for detecting and converting the modulated DL λ 0 optical signal respective of the plurality of N P2P fibers into a downlink RF signal for downlink transmission and to reflect and modulate the respective one of the plurality of N CWs having wavelengths λ 1 -λN by an uplink RF signal for uplink transmission to the HE unit; wherein the REAT includes a semiconductor Multi-Quantum-Well Structure having a bandgap between a conduction and valence band that is modulatable by an uplink RF signal, wherein when a CW of the plurality of N CWs arrives at the REAT, which CW having an appropriate wavelength, the uplink RF signal affects the absorption rate imparted on the CW by the semiconductor MQW structure, thereby modulating the CW, and wherein a difference in wavelength between a modulated downlink DL λ 0 optical signal and CW λ 1 -λ N is large enough such that modulation of the CW λ 1 -λ N by the uplink RF signal does not affect the absorption of the modulated downlink λ 0 for conversion thereof into the downlink RF signal. a head-end unit (302, 302a, 302b, 302c, 402); and a plurality of remote units (306-1...306-N, 406-1...406-N); characterized by further comprising a plurality of N point-to-point (P2P) fibers; wherein the HE unit is used to transmit downlink to the RUs, over the plurality of N P2P fibers, a plurality of modulated downlink λ 0 optical signals and a respective plurality of N continuous waves (CWs) of different wavelengths λ 1 -λN; and wherein each RU (306-1...306-N, 406-1...406-N) includes a reflective electro-absorption transceiver (REAT) for detecting and converting the modulated DL λ 0 optical signal respective of the plurality of N P2P fibers into a downlink RF signal for downlink transmission and to reflect and modulate the respective one of the plurality of N CWs having wavelengths λ 1 -λN by an uplink RF signal for uplink transmission to the HE unit; wherein the REAT includes a semiconductor Multi-Quantum-Well Structure having a bandgap between a conduction and valence band that is modulatable by an uplink RF signal, wherein when a CW of the plurality of N CWs arrives at the REAT, which CW having an appropriate wavelength, the uplink RF signal affects the absorption rate imparted on the CW by the semiconductor MQW structure, thereby modulating the CW, and wherein a difference in wavelength between a modulated downlink DL λ 0 optical signal and CW λ 1 -λ N is large enough such that modulation of the CW λ 1 -λ N by the uplink RF signal does not affect the absorption of the modulated downlink λ 0 for conversion thereof into the downlink RF signal.