Indoor wireless optical communications

Indoor wireless optical communications (IWOC) can offer in certain applications a valuable alternative to wireless radio. Its main advantages being: low cost, medical safety and unlicensed band- width. The most suitable band- width seems to be 1550 nm because of low noise and WDM solutions accessible by the current technology. In this paper we show a synthesis of some original results obtained last few years: impulse response simulation and measurement of IWOC channels, WDMA access solutions and Er doped spherical concentrator and amplifiers for IWOC.