Title :
OSNR Requirements for Self-Homodyne Coherent Systems
Author :
Sjödin, Martin ; Johannisson, Pontus ; Karlsson, Magnus ; Tong, Zhi ; Andrekson, Peter A.
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
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.
Keywords :
band-pass filters; homodyne detection; light coherence; optical fibre networks; optical modulation; quadrature phase shift keying; bandpass filtering; copropagating local oscillator; fiber-optic networks; filter bandwidth; homodyne detection; intradyne detection; optical signal-to-noise ratio; quadrature phase shift keying; self-homodyne coherent systems; Intradyne (ID); optical signal-to-noise ratio (OSNR); quadrature phase-shift keying (QPSK); self-homodyne (SH);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2036376
