Experimental Study of Mode Field Evolution of Dual-Core Photonic Crystal Fiber

Dispersion-flattened Bragg photonic crystal fiber for large capacity optical communication system

“…To tackle this problem, dense wavelength division multiplexing (DWDM) communication systems are adopted. However, the dispersion of ITU-T G.652 fibers usually used in DWDM systems is comparatively big, so the dispersion of the systems must be compensated [1][2][3][4]. To achieve even lower values of dispersion and to improve the dispersion flatness over wider bandwidths, more complicated designs have been studied, and some novelty fibers such as ITU-T G.655, G.656 optical fibers were fabricated.…”

Phase Noise of Optically Generated Microwave Using Sideband Injection Locking

“…[2−4] At present, several optical techniques have been proposed to generate mm-wave carriers, including sideband injection locking, [5,6] mode-locked lasers, [7] optical phase locking ring [8] and external modulation. [9,10] Among the various methods proposed so far, sideband injection locking is able to generate microwave carriers with high spectral purity and the system based on it has demonstrated high stability and tunability for the carriers. [11] Meanwhile, sideband injection locking offers the potential to fabricate monolithic integrated devices for rf carrier generation.…”

Proposição e estudo de fibras ópticas microestruturadas tipo D: gerenciamento de dispersão e alta birrefringência

“…Dessa forma, em comprimentos de onda menores que o comprimento de onda de casamento λ c , o modo está muito bem comportado no núcleo interno. Por outro lado, em comprimentos de onda maiores que λ c o modo passa a existir apenas no núcleo externo.Entretanto, analisando o comportamento modal dessas fibras nota-se que essa transição modal do campo do núcleo interno para o núcleo externo não ocorre dessa forma abrupta, mas sim de forma gradual[99]. Esta energia remanescente nos núcleos, até o presente momento, não foi abordada na literatura.…”