Open AccessSpurious mode reduction in dual injection-locked optoelectronic oscillators
Author(s) -
Olukayode Okusaga,
Eric J. Adles,
Etgar Levy,
Weimin Zhou,
G. M. Carter,
Curtis R. Menyuk,
Moshe Horowitz
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.005839
Subject(s) - phase noise , spurious relationship , noise (video) , radio frequency , injection locking , optics , materials science , optoelectronics , phase (matter) , local oscillator , physics , telecommunications , computer science , laser , machine learning , artificial intelligence , image (mathematics) , quantum mechanics
Optoelectronic oscillators (OEOs) are promising sources of low phase noise radio frequency (RF) signals. However, at X-band frequencies, the long optical fiber delay line required for a high oscillator Q also leads to spurious modes (spurs) spaced too narrowly to be filtered by RF filters. The dual injection-locked OEO (DIL-OEO) has been proposed as a solution to this problem. In this work, we describe in detail the construction of a DIL-OEO. We also present experimental data from our systematic study of injection-locking in DIL-OEOs. With this data, we optimize the DIL-OEO, achieving both low phase noise and low spurs. Finally, we present data demonstrating a 60 dB suppression of the nearest-neighbor spur without increasing the phase noise within 1 kHz of the 10 GHz central oscillating mode.