Modulation accuracy of terahertz transmitter employing optical frequency comb.

Terahertz (THz) transmitter employing optical frequency comb can provide high quality THz carrier, and is useful to the future broadband THz communication systems based on coherent transmission technique. To achieve coherent transmission, it is important to evaluate the signal quality of a THz transmitter, and we derive error vector magnitude (EVM) including optical impairments of the optical frequency comb. The calculated EVM is in good agreement with simulated one, and practical requirements for EVM are indicated. [ABSTRACT FROM PUBLISHER]