Abstract

BUENO ESCOBEDO, J. L. et al. Generador de microondas con un láser de Brillouin de fibra óptica estabilizado de bajo costo para sistemas de radio sobre fibra. Rev. mex. fis. [online]. 2021, vol.67, n.1, pp.109-113.  Epub Jan 31, 2022. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.67.109.

We have proposed a new optoelectronic oscillator to generate a stable ultra-narrow microwave carrier signal with low phase noise based on stimulated Brillouin scattering. A cost-effective sub-kilohertz Brillouin fiber ring laser with stabilized self-injection locked pump DFB (Distributed Feedback Laser) laser is offered as a key technique for microwave carrier generation. The full-width of generated microwave signal at −3 dB level is approximately equal to 300 Hz with a peak maximum at ∼10.946 GHz. The strongest parasitic harmonics shifted from carrier signal peak on ±50 kHz, ±450 kHz, and ±900 kHz are below the main peak on 45-50 dB. A phase noise below -90 dBc/Hz for a frequency offset above 10 kHz from the carrier after passing the 20 km length test fiber was achieved.

Keywords : Radio over fiber; self-injection locking; optoelectronic oscillator.

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