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Design and Dynamics of Multiloop Optical Frequency Locked Loop
Journal article   Peer reviewed

Design and Dynamics of Multiloop Optical Frequency Locked Loop

Milad Alemohammad, Yifei Li and Peter Herczfeld
Journal of lightwave technology, v 31(22), pp 3453-3459
15 Nov 2013

Abstract

Delays Fiber delay line laser heterodyning local oscillator distribution microchip laser Optical feedback Optical fibers Optical filters Optical noise Phase noise tunable optoelectronic synthesizer
Next generation radar system desires frequency agile low phase noise local oscillator signal. A rapidly tunable multiloop optical frequency locked loop (OFLL) can provide such functionality. The OFLL employs a pair of electro-optic tunable microchip lasers that are heterodyned to produce a frequency agile microwave modulated optical subcarrier. A feedback through a multiloop fiber optic based microwave frequency discriminator assures low phase noise operation. This paper concerns design and optimization of stable, low phase noise OFLLs. This paper features a parametric study, followed by proof-of-concept experiments. Phase noise of -120 dBc/Hz at 10 KHz offset is achieved experimentally and conditions for obtaining a phase noise in excess of -130 dBc/Hz are discussed.

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Web of Science research areas
Engineering, Electrical & Electronic
Optics
Telecommunications
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