Emitted optical power (Output Power) refers to the average output optical power of the light source at the transmitting end of the optical transceiver, also called output optical power. Unit: W or mW or dBm, unit conversion formula: P (dBm) = 10Log (P / 1mW). A. Fiber optic cables enable transmission over long distances, ensure low damping vs frequency, are light and flexible, and provide high immunity against distur-bances from magnetic and electric fields. This product is intended to typically be used with fiber optic receiver board.