A self-starting optical pulse source based on mutually coupled optoelectronic oscillators is described. The system employs a phototransistor-based microwave oscillator that is coupled to a fiber cavity optoelectronic oscillator with an intracavity fiber parametric amplifier. It self-starts and exhibits 3 ps pulses at a rate of 10 GHz with extremely low jitter of 30, 29, and 40 fs (for integration bandwidths of 100 Hz-15 kHz, 500 Hz-1 MHz, and 100 Hz-1 MHz, respectively).
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Author Affiliations: Department of Community Medicine, Information and Health Decision Sciences, University of Porto, Porto, Portugal (Dr Mota); Health School, Polytechnic Institute of Viseu, Viseu, Portugal (Drs Mota, Santos, and Cunha); Health Sciences Research Unit: Nursing (UICISA: E), Coimbra, Portugal (Drs Mota and Cunha); CINTESIS@RISE - Center for Health Technology and Services Research, University of Porto, Porto, Portugal (Drs Mota and Santos); Academic Clinical Centre of Beiras, Covilhã, Portugal (Drs Mota and Cunha); Abel Salazar Institute of Biomedical Sciences, University of Porto, Porto, Portugal (Drs Melo and Santos); Portugal Centre for Evidence-Based Practice: A Joanna Briggs Institute Centre of Excellence, Coimbra, Portugal (Dr Santos); Hospital São Teotónio, Tondela Viseu Hospital Centre, Viseu, Portugal (Dr Abrantes); Santa Casa da Misericórdia de Seia, Seia, Portugal (Dr Monteiro); and Nursing School of Porto, Porto, Portugal (Dr Santos).
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