title: Power efficient subcarrier modulation for intensity modulated channels.
abstract: We compare formats for optical intensity modulation limited by thermal noise with the assumption of having ideal devices. At the same bitrate and bandwidth, a hitherto unknown format turns out to be more power efficient than known formats. This new modulation, which is a hybrid between on-off keying and phase-shift keying, belongs to the subcarrier modulation family. At asymptotically high signal-to-noise ratios, this hybrid scheme has a 1.2 dB average electrical power gain and 0.6 dB average optical power gain compared to OOK, while it has a 3.0 dB average electrical power gain and 2.1 dB average optical power gain compared to subcarrier QPSK.
authors: Department of Signals and Systems, Chalmers University of Technology, SE-412 96 Göteborg, Sweden. johnny.karout@chalmers.se
authors: Johnny
authors: J
authors: Karout
authors: Erik
authors: E
authors: Agrell
authors: Magnus
authors: M
authors: Karlsson
mesh_terms: D016477:Artifacts; D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation* / Q000379:methods*; D007834:Lasers; D008962:Models, Theoretical; D013685:Telecommunications / Q000295:instrumentation*