Katsumi Sudo, Koji Ando, Ryuji Satake, Nobuhiko Hattori, Yousuke Tokunaga
An optical repeater system has been developed that provides pager and cellular phone services in an underground parking garage, where such services were unavailable. The transmitter uses the multi-coupler method which reduces the cost of equipment and diminishes the number of fibers. Use of a low-noise, low-distortion 1.3-µm distributed feedback laser provides high system performance.
Out- and indoor radio transmission design was carried out and the system's feasibility was tested by installation in an underground parking garage. This paper reports on equipment design and radio transmission design.