Optical 4-ary FSK modulation and demodulation experiment

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Optical 4-ary FSK modulation and demodulation experiment

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© The Institution of Electrical Engineers
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Experimental results of the new 4-ary FSK modulation and demodulation systems are reported. Two binary signals are directly injected into different electrodes of a 3-electrode DFB-LD, producing an optical 4-ary FSK signal with 1 GHz frequency spacing. For demodulation, two differential detectors convert the 4-ary FSK signal into two binary signals.

Inspec keywords: optical modulation; semiconductor junction lasers; frequency shift keying; distributed feedback lasers

Other keywords: electrodes; optical 4-ary FSK signal; demodulation; frequency spacing; DFB-LD; modulation; differential detectors; binary signals; FSK

Subjects: Lasing action in semiconductors; Laser beam interactions and properties; Semiconductor lasers; Laser beam modulation, pulsing and switching; mode locking and tuning

References

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      • Y. Yoshikuni , G. Motosugi . Multielectrode distributed feedback laser for pure frequency modulation and chirping suppressed amplitude modulation. IEEE J. Lightwave Technol. , 516 - 532
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      • L.L. Jeromin , V.W.S. Chan . M-ary FSK performance for coherent optical communications system using semiconductor lasers. IEEE Trans. , 375 - 381
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