Title :
Multiple laser diodes non-orthogonal power combining
Author :
Atkin, Guillermo E. ; Corrales, Hector P. ; Lu, Mean H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA
fDate :
5/1/1989 12:00:00 AM
Abstract :
A power combiner is proposed in which the signaling frames are obtained from a code set formed by nonorthogonal constant-weight codewords. The rate improvements of multiple-diode schemes using the combiner are presented, as compare to a single-diode pulse position modulation (PPM) scheme. Comparisons are made assuming the same alphabet size, and the same peak power per diode. As a function of the number of diodes, optical systems based on this combining scheme are shown to provide data rate improvements about 40% higher than a conventional orthogonal combiner. Because of the reduction of the signaling frame length, this combining technique provides substantial rate improvements as a function of the input alphabet size
Keywords :
optical communication equipment; optical modulation; semiconductor junction lasers; PPM; alphabet size; code set; codewords; data rate; multiple laser diodes; nonorthogonal power combining; optical systems; power combiner; pulse position modulation; signaling frames; Decoding; Diode lasers; Error probability; Optical beams; Optical design; Optical design techniques; Optical pulses; Peak to average power ratio; Power combiners; Pulse modulation;
Journal_Title :
Consumer Electronics, IEEE Transactions on
