In the paper, we present and demonstrate experimentally a 10Gbit/s on-off keying (OOK) bidirectional wavelengthdivision-multiplexing (WDM) free space optical (FSO) communication architecture integrated in fiber network together with 5
m free space transmission length and 25 km fiber link, respectively. To achieve bidirectional FSO link, the all WDM wavelengths
can be used simultaneously to serve as the downstream and upstream traffics in the proposed FSO- WDM system. Here, four
pairs of line terminations (LTs) and optical wireless units (OWUs) and integrated arbitrarily in fiber access network for
confidential and bidirectional FSO connection based on the requirement of practical environment
