Optical communication system employing optical frequency codes, optical receiver and the optical transmitter, the reflection type optical communication device

摘要

Without eliminating the need for calibration of the optical frequency of the light source, increasing the transmission band, and allows the use of many codes. The FSR and the optical frequency range of the light source, all codes to have orthogonality to each other and, as the FSR code length. Integer from 1 to the maximum number of codes / 2, Cn (f) = (1-cos (2πsf / FSR + rπ / 2)) / 2 (s 1 or r = 0 each light intensity frequency characteristics of the n-th optical code signal I give orthogonality to optical code signal as between). Or sequentially assigned optical frequency chips continuous chip sequence constituting an optical code signal, and outputs the optical frequency of each chip "1", and was continuously example, repeated Hadamard codewords secondary and (0101) and (0011) The filters and light filtering properties of the consolidated codes, and optical code signals through the source light on this. Decoded optical frequency region 32 and encoded optical frequency region 31 so as to cover the drift range of source light frequency. ΔF ₁ of 13 in Figure, ΔF ₂ is the drift of the source light frequency.