Quantum key distribution enables unconditionally secure key distribution between two legitimate users. Although various QKD protocols are used, each protocol has its own pros and cons. Introduction of CV-QKD can build upon standard telecommunication technology, (i.e) the coherent detection method (homodyne detection) which is widely used in classical optical communications instead of a sophisticated single photon counting technique. Optical fiber and free space are the common channel implementations for CVQKD. A free space optical (FSO) link testbed has been designed with motorized line of sight detection for fine alignment. The system monitors the bit error rate (BER) for protocols such as on-off keying. The automated data collection and monitoring system controls the motorized stages, and auto-adjusts the pitch and yaw angles so as to mitigate the effects of beam wander. The outdoor testbed, over 150 m, was also recreated within a laboratory using multiple reflections between two mirrors. This enables us to conduct primary experiments in a controlled environment with Gbps electronics driven from FPGA boards.