Patent ID: 9735911
Date: 2017-08-15
CPC Classifications: H04J

Claim:
1. A system comprising: code, the mask a transmitter (coder) architecture based on principles of Code Division Multiple Access (CDMA) for transmitting digital data of N-1 users simultaneously (N being a number power of 2), each user assigned a unique digital code of length N, this code employed to configure an optical masking unit in the receiver (decoder); a light source unit comprising a number of coherent lasers, the number of coherent lasers being at least equal to half the number of users plus one (N), each of the coherent lasers being configured for operation at a different specific prescribed operating frequency; a specific set of digital user codes that are orthogonal, (two codes u1 and u2 are orthogonal if quantity u a procedure to generate such orthogonal code set; an on/off switching system for each user's laser array, imparting unique user digital identity code to each bit of transmitted data, the code having a code length of at least equal to a number of users plus one; a modulation unit being configured for applying the user's data to the coherent lasers; and an optical combiner unit being operable for combining outputs of the coherent lasers to an optical fiber input.