Multi-cavity optoelectronic oscillators using multicore fibers

Abstract

Abstract:We propose the use of both homogeneous and heterogeneous multicore fibers to implement multi-cavity optoelectronic oscillators. We present design equations and examples that show the potential for unique performance in terms of spectral selectivity, tunability and high-frequency operation. References and links 1.Technology focus on Microwave photonics, Nat. Photonics 5, 723-736 (2011 D. Barrera, I. Gasulla and S. Sales, "Multipoint two-dimensional curvature optical fiber sensor based on a non-twisted homogeneous four-core fiber," J. Lightwave Technol. (in press). 9.X.S. Yao and L. Maleki, "Converting light into spectrally pure microwave oscillation," Opt. Lett. 21, 483-485 (1996). 10. X.S. Yao and L. Maleki, "Optoelectronic microwave oscillator," J. Opt. Soc. Am. B 8, 1725-1735 (1996). 11. X.S. Yao and L. Maleki, "Opto-electronic oscillator for photonic systems," IEEE J. Quantum Electron. 32, 807-814 (1996) compound coupled structures for FDMA demultiplexing," J.

Microwave Signal Processing over Multicore Fiber

“…Multicavity or multiloop optoelectronic oscillators [53][54][55][56][57] can benefit from a reduction of size and weight if the different cores of a multicore fiber act as the required oscillation cavities. In addition, since all the cavities are hosted within the same cladding, this approach provides a fiber integrated medium for enhancing the OEO relative stability against environmental and mechanical fluctuations.…”

“…In essence, a short loop provides the required spectral separation between adjacent oscillating modes while a long loop is responsible for the spectral purity. The number of loops can as well be generalized to an arbitrary number [54][55][56][57]59]. In concrete, the work reported in [54] experimentally demonstrated three-cavity OEOs by using three different single-mode fiber links whose lengths were multiple of a given reference value.…”

“…In concrete, the work reported in [54] experimentally demonstrated three-cavity OEOs by using three different single-mode fiber links whose lengths were multiple of a given reference value. The incorporation of MCFs as the hosting medium for all the cavities was first proposed and theoretically evaluated in [55] considering both homogeneous and heterogeneous fiber configurations. There, we show how homogeneous MCFs allow for two different OEO architectures, highly unbalanced dual-cavity operation (the cavity lengths are a multiple of a reference value) and multi-cavity vernier operation (the cavity lengths are slightly different), where moderate and long cavity lengths (>2 m) are compatible with a high-spectral purity and multi-GHz oscillation mode spectral separation.…”

“…In [55], we introduced vernier OEO operation built upon heterogeneous MCF links with long-cavity lengths (>1 km) that can provide high-spectral purity and multi-GHz oscillation mode spectral separation, while providing lower phase noise operation. If the dispersion parameter D in each core is a multiple of a basic value ΔD (incremental dispersion parameter), the oscillation frequency for a core with a length L is given by [55]: Phase Noise (dBc/Hz) Figure 9.…”

“…In [55], we introduced vernier OEO operation built upon heterogeneous MCF links with long-cavity lengths (>1 km) that can provide high-spectral purity and multi-GHz oscillation mode spectral separation, while providing lower phase noise operation. If the dispersion parameter D in each core is a multiple of a basic value ΔD (incremental dispersion parameter), the oscillation frequency for a core with a length L is given by [55]: Phase Noise (dBc/Hz) Figure 9. Experimental oscillation spectra of a multi-cavity Vernier optoelectronic oscillator using a 20-m seven-core fiber for: (a) dual-versus triple-loop operation; and (b) three consecutive oscillation modes for the triple-loop operation [59].…”