Coherent optical CDMA with limited phase excursion |
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Authors: | Ayadi F. Rusch L.A. |
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Affiliation: | Commun. Res. Centre, Ottawa, Ont.; |
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Abstract: | We examine the bit error rate (BER) of the conventional matched-filter detector for an optical code division multiple access (CDMA) system employing coherent homodyne detection. We assume a phase shift keying (PSK) modulation format where the phase is modulated by one of two methods: (1) an external phase modulator or (2) injection locking. Phase excursion is limited to ±0.42 π when using injection locking. We examine the bit error rate performance for both external modulation and modulation of the injection current and find only a moderate penalty (0.55 dB) associated with the limited phase excursion |
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