Adrian Amezcua-Correa

Microstructured optical fibers as high-pressure microfluidic reactors

Deposition of semiconductors and metals from chemical precursors onto planar substrates is a well-developed science and technology for microelectronics. Optical fibers are an established platform for both communications technology and fundamental research in photonics. Here, we describe a hybrid technology that integrates key aspects of both engineering disciplines, demonstrating the fabrication of tubes, solid nanowires, coaxial heterojunctions, and longitudinally patterned structures composed of metals, single-crystal semiconductors, and polycrystalline elemental or compound semiconductors within microstructured silica optical fibers. Because the optical fibers are constructed and the functional materials are chemically deposited in distinct and independent steps, the full design flexibilities of both platforms can now be exploited simultaneously for fiber-integrated optoelectronic materials and devices.

Electrical and Raman characterization of silicon and germanium-filled microstructured optical fibers

Extreme aspect ratio tubes and wires of polycrystalline silicon and germanium have been deposited within silica microstructured optical fibers using high-pressure precursors, demonstrating the potential of a platform technology for the development of in-fiber optoelectronics. Microstructural studies of the deposited material using Raman spectroscopy show effects due to strain between core and cladding and the presence of amorphous and polycrystalline phases for silicon. Germanium, in contrast, is more crystalline and less strained. This in-fiber device geometry is utilized for two- and three-terminal electrical characterization of the key parameters of resistivity and carrier type, mobility and concentration

50 μm Multimode Fibers for Mode Division Multiplexing

50-μm-diameter graded-index core multimode fibers can be adapted to mode-division-multiplexed transmissions that use multiple-input-multiple-output digital signal processing and selective mode multiplexing. We realize and characterize such fibers and compare them to low-differential-mode-group-delay few-mode fibers.

WideBand OM4 multi-mode fiber for next-generation 400Gbps data communications

We define the bandwidth requirements for OM4 performance within the wavelength window of 850 to 950nm. We have manufactured a MMF meeting these requirements while maintaining full compatibility with legacy OM4. This MMF enables 400Gbps using wavelength division multiplexing.

Surface Enhanced Raman Scattering using Metal Modified Microstructured Optical Fibre Substrates

We report the fabrication of metallic metamaterials using microstructured optical fibres as templates. The resulting fibres serve as excellent substrates for surface enhanced Raman spectroscopy and represent an exciting platform for in-fibre plasmonic devices.

Surface enhanced Raman scattering using metal modified microstructured optical fiber substrates

In this paper we report the fabrication of microstructured optical fibers (MOFs) metallic metamaterials using a bottom-up processing technique for surface enhanced Raman scattering (SERS) applications. The inner walls of the silica-based holey optical fiber have been modified by depositing granular films of Ag nanoparticles from its organometallic precursor at high pressure condition. The resulting fibers demonstrate strong SERS effect when analyte molecules are infiltrated within the MOF due to large electromagnetic field enhancement and long interaction length. The chemically modified MOFs with 3D patterning represent an exciting platform technology for next generation SERS sensors and plasmonic in-fiber integrated devices.

850–950nm wideband OM4 multimode fiber for next-generation WDM systems

A wideband OM4 multimode fiber for 850-950nm operation was fabricated by optimizing the Alpha value of the index profile. Bandwidth, differential-mode-delay, bit-error-rate measurements are presented. This wideband fiber offers OM4 performance over the 850-950nm window.

50μm multimode fibers for mode division multiplexing

50μm-diameter graded-index core multimode fibers can be adapted to mode-division-multiplexed transmissions that use multiple-input-multiple-output digital signal processing and selective mode multiplexing. We realize and characterize such fibers and compare them to low-differential-mode-group-delay few-mode fibers.

Extra-wide-band OM4 MMF for future 1.6Tbps data communications

We report the fabrication of a Highly Germanium and Fluorine co-doped MMF optimized according to effective bandwidth considerations, with OM4 performance over the 850-1000nm window. Such fiber opens the door to future 1.6Tbps data communications.

Extended distance transmission over wideband MMF using multi-wavelength VCSEL based transceivers

We verify the performance of a bi-directional multi-wavelength 40GbE transceiver over OM4 and wideband multimode fibre; and demonstrate record transmission of 300 m over wideband MMF. This is a 150 m length increment over the standard OM4.