Free-space optics (FSO) is a technology that utilizes modulated light beam to transmit information through the
atmosphere. Line-of-sight connection between both FSO transceivers is a necessary condition to maintain
continuous exchange of voice, video, and data information. To date, the primary concentration of mobile FSO
research and development has been toward the accurate aligning between two transceivers. This study introduces an
advanced FSO receiver that provides wider receiving angle compared with that of conventional FSO systems. We
present data from measurements of optical power, which were very promising, and indicated that these advanced
FSO receivers are suitable for FSO alignment applications and perform favorably with similar FSO receivers.