A5006564775- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Optical Coatings and Gratings
- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Advanced Optical Network Technologies
- Glass properties and applications
- Optical Polarization and Ellipsometry
- Optical and Acousto-Optic Technologies
- Adaptive optics and wavefront sensing
- Photorefractive and Nonlinear Optics
- Calibration and Measurement Techniques
- Spectroscopy and Laser Applications
- Advanced optical system design
- Orbital Angular Momentum in Optics
- Laser Material Processing Techniques
- Optical measurement and interference techniques
- Advanced Measurement and Metrology Techniques
- Optical Coherence Tomography Applications
- Nonlinear Photonic Systems
- Microbial bioremediation and biosurfactants
- Natural Products and Biological Research
Universidade de Santiago de Compostela
2012-2022
Universidad Estatal Amazónica
2015
Universidad de Santiago de Chile
2013
Optica
2009
We demonstrate mode-division multiplexed WDM transmission over 50-km of few-mode fiber using the fiber's LP 01 and two degenerate 11 modes.A EDFA is used to boost power output signal before a coherent receiver.A 6×6 time-domain MIMO equalizer recover transmitted data.We also experimentally characterize EDFA.
We experimentally demonstrate the first few-mode space division multiplexed (SDM) transmission of real-time 10Gb/s Ethernet (10GbE) traffic using commercial small form-factor pluggable SFP + transceivers without coherent detection or multiple input output digital signal processing (MIMO-DSP) over 0.5km elliptical-core few-mode-fiber, achieving <-26dB crosstalk between LP(11e) and LP(11o) modes at 1.3μm.
A seven-core few-mode multicore fiber in which each core supports both the LP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> mode and two degenerate xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> modes has been designed fabricated for first time, to best of our knowledge. The hole-assisted structure enables low inter-core crosstalk high density at same time. measured be lower than -60 dB/km. around -40 dB/km using a different...
We demonstrated 1.05-Pb/s transmission over 3km of multicore fiber with spectral efficiency 109b/s/Hz, using twelve single-mode cores carrying DP-32QAM-OFDM signals and two few-mode DP-QPSK in their LP01 LP11 modes.
We demonstrate mode division multiplexed WDM transmission using the LP01 and LP11 modes of a few fiber. The signal is recovered 6×6 MIMO equalizer at receiver after amplification by EDFA.
We present the analytical design of an imaging spectrometer based on three-concentric-mirror (Offner) configuration.The approach presented allows for rapid this class system.Likewise, high-optical-quality spectrometers are obtained without use aberration-corrected gratings, even high speeds.Our is calculation both meridional and sagittal images off-axis object point.Thus, curves in whole spectral range.Making these tangent to each other a given wavelength results significant decrease...
This is a proposal and description of new configuration for an Offner imaging spectrometer based on the theory aberrations off-plane classical-ruled spherical diffraction gratings.This comprises concave mirror used in double reflection convex grating operating quadrature, concentric layout.A very simple procedure obtains designs that are anastigmatic given point entrance slit wavelength.Specific examples show performance this type system improves analogous conventional in-plane systems, when...
We aim to show that Dyson imaging spectrometers can be easily designed by applying the concept of Rowland circle refracting surfaces. This allows us conceive an analytical procedure is based on removal astigmatism at two wavelengths. Following this procedure, high-optical-quality even for high speeds. Root-mean-square spot radii less than 2.5 μm are obtained speeds as f/1.5, slit lengths 15 mm, and wavelength ranges 0.4-1.7 μm. Design examples presented classical in which detector glued...
Photobiomodulation (PBM) therapy is a promising therapeutic approach for several pathologies, including stroke. The biological effects of PBM the treatment cerebral ischemia have previously been explored as neuroprotective strategy using different light sources, wavelengths, and incident powers. However, capability novel alternative to stimulate recovery injured neuronal tissue after ischemic stroke has poorly explored. aim this study was investigate low-level irradiation by Light Emitting...
We measure the modal gain and noise figure characteristics of a ring-doped few-mode erbium-doped fiber amplifier. obtained 1 dB higher in LP11 than LP01 at an average 12.5 per mode.
We present a theoretical study about spatial mode multiplexing/demultiplexing (mux/demux) without losses by means of interferometry with selective control the Gouy phase optical beams, that is, (GPI). Different values can be obtained inserting appropriate systems at each arm an interferometer. Thus, mux/demux operations strategic interest in communications few-mode fibers are implemented constructive interference and regardless parity separability beams. Consequently, unachievable based on...
Significant efforts are being made to increase optical network capacity in response ever-growing data traffic. One promising candidate is mode-division multiplexing (MDM) few-mode fibers. A fundamental element for MDM a modal transformer. Modal transformation can be implemented free-space basis by using multiregion phase plates. In this work, we show that efficient monolithic binary plates fabricated ion exchange glass and used tasks. We present an characterization method of such plates,...
High-quality Dyson imaging spectrometers are designed by applying a telecentric condition for off-axis image points. By imposing this two different wavelengths, designs presenting low aberrations the whole spectral range of system obtained. A UV-TO-NIR fast design (f/1.5) exhibiting excellent optical performance is presented.
A seven-core few-mode multi-core fiber in which each core supports three spatial modes has been designed and fabricated for the first time. The hole-assisted structure allows low crosstalk transmission of 21 per polarization wavelength.
We demonstrate mode-division multiplexed transmission using the LP01 and LPn modes over three heterogeneous spans of few-mode fiber investigate impact fusion splicing free-space coupling on mode mixing.
A seven-core few-mode multi-core fiber in which each core supports three spatial modes has been designed and fabricated. Low inter-core crosstalk is achieved with a high mode density. This allows multiplexed transmission of 21 per polarization.
A Mach-Zehnder interferometer (MZI) that includes in an arm either a reflective image inverter or Gouy phase shifter (RGPS) can (de)multiplex many types of modes few mode fiber without fundamental loss. The use RGPSs combination with binary plates for multiplexing purposes is studied the first time, showing particular RGPS shifts π odd only multiplexes accurately low order modes. To overcome such restriction, we present new exact refractive inverter, more compact and flexible than its...
We review the theory of spherical diffraction gratings with regard to their imaging properties in off-plane arrangements. Our study is restricted equally spaced grooves, and it focused on quadrature configuration, where incident planes are orthogonal each other. identify regions low astigmatism propose some monochromator mounts.
Mode-division multiplexing (MDM) in few-mode fibers is regarded as a promising candidate to increase optical network capacity. A fundamental element for MDM modal transformer LP modes which can be implemented free-space basis by using multiregion phase plates, that is, plates. Likewise, several wavelengths have used due wavelength purposes, amplification tasks, and so on. In this work we show efficient monolithic binary plates different fabricated ion-exchange glass tasks. We introduce an...
Abstract An experimental technique of a three-step silver-sodium ion exchange in soda-lime glass substrates is presented. Two exchanges different regions on the substrate are realized, followed by post-baking such that waveguide parameters each region can be predicted accurately. By proper choice fabrication high transmission obtained. Theoretical and results an integrated optical component (a set 17 lenses)
Using a transmission fiber with zero differential modal dispersion wavelength and gain-equalized few-mode EDFA, we demonstrate mode-multiplexed over recirculating loop all components.
The refractive indices of planar silver-ion-exchanged waveguides have been modified by UV excimer laser irradiation ?=193 nm. effective index changes the fundamental modes after exposition are as large 2×10-2. procedure permits fabrication integrated optical components in a direct way, with neither use standard lithography nor previous sensitizing substrate. Optical characterization irradiated samples is presented. By appropriate masks, we fabricated Bragg gratings.