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Opt Express. 2012 Aug 13;20(17):19420-30. doi: 10.1364/OE.20.019420.

Low-noise RF-amplifier-free slab-coupled optical waveguide coupled optoelectronic oscillators: physics and operation.

Author information

1
Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Massachusetts 02420, USA. William.Loh@ll.mit.edu

Abstract

We demonstrate a 10-GHz RF-amplifier-free slab-coupled optical waveguide coupled optoelectronic oscillator (SCOW-COEO) system operating with low phase-noise (<-115 dBc/Hz at 1 kHz offset) and large sidemode suppression (>70 dB measurement-limited). The optical pulses generated by the SCOW-COEO exhibit 26.8-ps pulse width (post compression) with a corresponding spectral bandwidth of 0.25 nm (1.8X transform-limited). We also investigate the mechanisms that limit the performance of the COEO. Our measurements indicate that degradation in the quality factor (Q) of the optical cavity significantly impacts COEO phase-noise through increases in the optical amplifier relative intensity noise (RIN).

PMID:
23038585
DOI:
10.1364/OE.20.019420
[Indexed for MEDLINE]

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