Receiver for a coherent fiber-optic link with high dynamic range and low noise figure

• Published in: 2005 International Topical Meeting on Microwave Photonics pp. 273 - 276
• Main Authors: Yifei Li, Yoo, D., Herczfeld, P., Rosen, A., Madjar, A., Goldwasser, S.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2005
• Subjects: coherent fiberoptic link; Demodulation; Dynamic range; high SFDR; low NF; Noise figure; Noise measurement; Phase locked loops; Phase modulation; Photonic phase locked loop
• ISBN: 9788995004333; 8995004339
• DOI: 10.1109/MWP.2005.203592

Phase modulated coherent fiberoptic links can potentially provide exceptionally high spurious free dynamic range (SFDR) and low noise figure (NF). Critical issue is the development of a strictly linear phase demodulator. In this paper we describe a phase demodulator employing a phase locked loop discriminator. Implementing the PPLL on a single substrate using the state-of-the-art components could yield an SFDR better than 145 dB/Hz2/3 and NF lower than 3dB.