A5021008221- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Silicon Nanostructures and Photoluminescence
- Optical Network Technologies
- Plasmonic and Surface Plasmon Research
- Optical Coatings and Gratings
- Metamaterials and Metasurfaces Applications
- Advanced MIMO Systems Optimization
- Telecommunications and Broadcasting Technologies
- Multimedia Communication and Technology
- Orbital Angular Momentum in Optics
Telnet Redes Inteligentes (Spain)
2015
Universitat Politècnica de València
2007-2011
Polytechnic University of Puerto Rico
2009
We demonstrate experimentally all-optical switching on a silicon chip at telecom wavelengths. The device comprises compact ring resonator formed by horizontal slot waveguides filled with highly nonlinear nanocrystals in silica. When pumping power levels about 100 mW using 10 ps pulses, more than 50% modulation depth is observed the switch output. performs 1 order of magnitude faster previous approaches and fully fabricated complementary metal oxide semiconductor technologies.
A novel tunable single bandpass photonic microwave filter is proposed. It based on optically filtering one of the sidebands a phase-modulated optical carrier by means notch response silicon-on-insulator ring resonator. The can be tuned changing laser wavelength. Experimental results to prove concept are provided.
A compact waveguide crossing structure with low transmission losses and negligible crosstalk is demonstrated for silicon-on-insulator circuits. The based on a mode expander optimized by means of genetic algorithm leading to lower than 0.2 dB reflection below 40 in broad bandwidth 20 nm. Furthermore, the resulting has footprint only 6x6 microm(2) does not require any additional fabrication steps.
We study the reflection properties of squeezing devices based on transformation optics.An analytical expression for angle-dependent coefficient a generic three-dimensional squeezer is derived.In contrast with previous studies, we find that there exist several conditions guarantee no reflections so it possible to build transformation-opticsbased reflectionless squeezers.Moreover, shown design antireflective coatings non-reflectionless case can be reduced matching impedance between two...
Low crosstalk losses in silicon-on-insulator waveguides are demonstrated by choosing the optimum crossing angle. It is obtained that using angles of 60deg or 120deg instead conventional 90deg angle improved more than 10 dB without degrading transmission losses. Experimental results show a very good agreement with three-dimensional finite-difference time-domain simulation results. The proposed structure has high compactness, broad bandwidth almost flat and constant losses, robust against...
We investigate the chromatic dispersion properties of silicon channel slot waveguides in a broad spectral region centered at ~1.5 μm. The variation profile as function fill factor, i.e., ratio between and waveguide widths, is analyzed. Symmetric well asymmetric geometries are considered. In general, two different regimes identified. Furthermore, our analysis shows that zero and/or peak wavelengths can be tailored by careful control geometrical parameters including cross-sectional area,...
A polarization insensitive technique for highly efficient coupling between SOI waveguides and high mode field diameter single-mode fibers is reported. The proposed structure based on an inverted taper coupled to a fiber-adapted waveguide. waveguide made by using the SiO(2) layer under Si waveguiding of wafer thus avoiding use extra materials such as polymers. aimed being integrated with V-groove auto-alignment techniques. Coupling losses 3.5dB 3.7dB 8mum have been estimated means 3D-BPM...
We study cross-slot waveguides for polarization diversity schemes that simultaneously offer strong confinement in the slot region both TE and TM polarizations. A symmetric configuration is initially presented to demonstrate same propagation constants can be obtained polarizations thicknesses down 50 nm. To make easier further realization of these waveguides, an asymmetric waveguide with a vertical height up 120 nm proposed. The parameters are then optimized taking into account 220 silicon...
We demonstrate group-index engineering in a one-dimensional periodic silicon structure consisting of deep-etched laterally corrugated waveguide with circular holes patterned onto its wide section. Our theoretical analysis, supported by experimental results, shows that the first-order optical mode can propagate inside Brillouin zone relatively high group index over frequency range. Nearly constant as 13.5 wavelength range ~14nm is experimentally demonstrated 50-μm-long waveguide.
Horizontal slot waveguides are becoming a very promising waveguide configuration for silicon photonics nonlinear applications. In this letter, the design of grating couplers highly efficient coupling between standard single-mode fibers and horizontal is reported. Parameters have been optimized to achieve maximum efficiency lambda = 1550 nm transverse magnetic polarization. Maximum efficiencies 61% 48% achieved negative positive detuned couplers, respectively, by means simulations. A 35-nm...
A study of group velocity dispersion horizontal slot waveguides filled by Si nanocrystals with different Silicon concentrations has revealed a change in the sign GVD from negative to positive values across third telecom window.
The linearity properties of ring-assisted MZI (RAMZI) electro-optic silicon modulators are investigated. When quadrature biased the RAMZI modulator with V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">bias,DC</sub> =1 and applied a 1 GHz RF tone frequency, it is obtained Spurious-Free Dynamic Range (SFDR) 71.65 dB·Hz <sup xmlns:xlink="http://www.w3.org/1999/xlink">2/3</sup> , an input intercept point IIP3=67 dBm. Measurements on QPSK 16-QAM...
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionUltrafast All-Optical Switching in Silicon-Nanocrystal-Based Silicon Slot Waveguide at Telecom WavelengthsAlejandro Martínez, Javier Blasco, Pablo Sanchis, José V. Galán, Jaime García-Rupérez, Emmanuel Jordana, Pauline Gautier, Youcef Lebour, Sergi Hernández, Rita Spano, Romain Guider, Nicola Daldosso, Blas Garrido, Jean Marc Fedeli, Lorenzo Pavesi, and MartíCite this: Nano Lett. 2010, 10, 6,...
Grating couplers for efficient coupling between silicon sandwiched slot waveguides and standard singlemode fibres are demonstrated. Coupling efficiency up to 20% is experimentally measured TM polarisation a wavelength of 1550 nm. A 20 nm 1 dB bandwidth also obtained. Higher expected particular designs according simulation results.
Integration of a polarization insensitive inverted taper-based fiber coupling structure with silicon etched V-grooves is demonstrated in CMOS photonics. Coupling loss 7.5 dB are measured at lambda=1.55 mum. A spectrum broader than 70 nm observed.
The potential of silicon-based electro-optic modulators for enabling high performance radio-over-fiber applications is demonstrated. Two different taking advantage the linear and nonlinear regime silicon are investigated. A ring-assisted Mach-Zehnder modulator (MZM) firstly investigated RF analog transmission. QPSK 16-QAM electrical signals modulated on a 1 GHz carrier with an error vector magnitude lower than 10% symbol rate 20Msymbols/s. MZM enhanced via slow-light propagation secondly...
We present a slot waveguide configuration which simultaneously works for TE and TM polarizations. Simulation results are reported to achieve single-mode propagation insensitivity polarization. Dispersion is also analyzed by calculating the GVD parameter.
Grating couplers for efficient vertical coupling between sandwiched slot waveguides and standard single-mode fibers are demonstrated. 20% efficiency is experimentally measured. Higher expected particular designs according to simulation results.
Low crosstalk losses in silicon-on-insulator (SOI) waveguides are demonstrated. The proposed crossing structure has a high compactness, broad bandwidth with almost flat transmission and constant is robust against fabrication inaccuracies.
We report design, fabrication and measurements of a compact broadband planar polarization splitter in SOI technology. The device is smaller than 5 mum with measured crosstalk up to 10 dB wavelength bandwidth higher 30 nm.
Optical nonlinear effects have been widely studied in III-V semiconductor photonics. However, performance silicon photonics is still inefficient. An alternative silicon-based waveguide configuration, which known as slot waveguide, has recently proposed to improve the a very efficient way. In fundamental mode light highly confined small region, called slot, of low index contrast material between two high layers. This enables introduction new photonic devices characteristics active optical...