OSNR Requirements for Self-Homodyne Coherent Systems

The optical signal-to-noise ratio requirements for a self-homodyne (SH) coherent system are investigated theoretically and experimentally and compared to intradyne (ID) detection. The beneficial effect of bandpass filtering of the copropagating local oscillator is demonstrated and it is shown that t...

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Veröffentlicht in:	IEEE photonics technology letters 2010-01, Vol.22 (2), p.91-93
Hauptverfasser:	Sjodin, M., Johannisson, P., Karlsson, M., Zhi Tong, Andrekson, P.A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Band pass filters Coherence Conferences Fiber optics Filtering Filtration High speed optical techniques Intradyne (ID) Local oscillators Optical communication Optical fibers Optical filters Optical noise Optical receivers Optical signal processing optical signal-to-noise ratio (OSNR) Oscillators Phase shift keying quadrature phase-shift keying (QPSK) self-homodyne (SH) Signal to noise ratio
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Beschreibung
Zusammenfassung:	The optical signal-to-noise ratio requirements for a self-homodyne (SH) coherent system are investigated theoretically and experimentally and compared to intradyne (ID) detection. The beneficial effect of bandpass filtering of the copropagating local oscillator is demonstrated and it is shown that the performance limit for SH and ID systems becomes equal as the filter bandwidth is made small.
ISSN:	1041-1135 1941-0174 1941-0174
DOI:	10.1109/LPT.2009.2036376