Microwave Signal Processing over Multicore Fiber

García, Sergi; Barrera, David; Hervás, J.; Sales, Salvador; Gasulla, Ivana

doi:10.3390/photonics4040049

Cited by 6 publications

(1 citation statement)

References 61 publications

(89 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multi-core fibers are being developed for the parallel transport of several data channels in space-division multiplexing optical communication networks [80][81] . They are readily employed in distributed shape sensing 82 , and in microwave-photonic signal processing [83][84] . Multi-core fibers also provide a rich playground for the study of opto-mechanical interactions.…”

Section: Introductionmentioning

confidence: 99%

Highly-coherent stimulated phonon oscillations in a multi-core optical fiber

Diamandi

London

Bashan

et al. 2018

Sci Rep

View full text Add to dashboard Cite

Opto-mechanical oscillators that generate coherent acoustic waves are drawing much interest, in both fundamental research and applications. Narrowband oscillations can be obtained through the introduction of feedback to the acoustic wave. Most previous realizations of this concept, sometimes referred to as “phonon lasers”, relied on radiation pressure and moving boundary effects in micro- or nano-structured media. Demonstrations in bulk crystals required cryogenic temperatures. In this work, stimulated emission of highly-coherent acoustic waves is achieved in a commercially-available multi-core fiber, at room temperature. The fiber is connected within an opto-electronic cavity loop. Pump light in one core is driving acoustic waves via electrostriction, whereas an optical probe wave at a different physical core undergoes photo-elastic modulation by the stimulated acoustic waves. Coupling between pump and probe is based entirely on inter-core, opto-mechanical cross-phase modulation: no direct optical feedback is provided. Single-frequency mechanical oscillations at hundreds of MHz frequencies are obtained, with side-mode suppression that is better than 55 dB. A sharp threshold and rapid collapse of the linewidth above threshold are observed. The linewidths of the acoustic oscillations are on the order of 100 Hz, orders of magnitude narrower than those of the pump and probe light sources. The relative Allan’s deviation of the frequency is between 0.1–1 ppm. The frequency may be switched among several values by propagating the pump or probe waves in different cores. The results may be used in sensing, metrology and microwave-photonic information processing applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Highly-coherent stimulated phonon oscillations in a multi-core optical fiber

Diamandi

London

Bashan

et al. 2018

Sci Rep

View full text Add to dashboard Cite

show abstract

Long tapered fiber with array of FBG

Chamorovskiy

Butov

Kolosovskiy

et al. 2019

Optical Fiber Technology

View full text Add to dashboard Cite

True-Time Delay Line Based on Dispersion-Flattened 19-Core Photonic Crystal Fiber

Shaheen

Gris-Sánchez

Gasulla

2020

J. Lightwave Technol.

Self Cite

View full text Add to dashboard Cite

A novel design of a tunable True-Time delay line (TTDL) based on a multicore Photonic Crystal Fiber (PCF) is proposed. It enables simultaneous transport and processing of microwave photonic signals over a broad radiofrequency processing range. Independent group delay behavior in 19 different cores characterized by a constant differential group delay between cores provides TTDL operation on 19 signal samples. The 19-core PCF structure allows tailoring the chromatic dispersion range between 1.5 and 31.2 ps/nmꞏkm, which translates into a very broad microwave signal processing range from a few up to tens of GHz. A near-zero dispersion slope reduces the time delay errors in the TTDL's operation to less than 5% in a 40-nm optical wavelength range, thus ensuring its satisfactory performance. Its performance as a TTDL is evaluated in terms of higher-order dispersion as well as other degradation effects such as crosstalk and nonlinear fiber response. A high index contrast between core and cladding, between 0.3 to 1.5%, enables low intercore crosstalk and confinement losses as well as greater robustness against fiber bends and twists. Fabrication of this type of MCF might be possible although it will prove challenging. This work advances the state-of-the-art of a TTDL based on SDM technology by increasing the number of samples and microwave processing range.

show abstract

Microwave Signal Processing over Multicore Fiber

Cited by 6 publications

References 61 publications

Highly-coherent stimulated phonon oscillations in a multi-core optical fiber

Highly-coherent stimulated phonon oscillations in a multi-core optical fiber

Long tapered fiber with array of FBG

True-Time Delay Line Based on Dispersion-Flattened 19-Core Photonic Crystal Fiber

Contact Info

Product

Resources

About