A5072857042- Photonic and Optical Devices
- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Mechanical and Optical Resonators
- Optical Coatings and Gratings
- Gyrotron and Vacuum Electronics Research
- Semiconductor Lasers and Optical Devices
- Image Retrieval and Classification Techniques
- Advanced Image and Video Retrieval Techniques
- QR Code Applications and Technologies
Technical University of Denmark
2015-2023
Karlsruhe Institute of Technology
2013-2014
We demonstrate frequency comb sources based on siliconorganic hybrid (SOH) electro-optic modulators.Frequency combs with line spacings of 25 GHz and 40 are generated, featuring flat-top spectra less than 2 dB power variations over up to 7 lines.The used for WDM data transmission at terabit/s rates distances 300 km.
Abstract Nanocavity devices enabling concentration of light in a very small volume have resulted several interesting applications over the past years. Of particular interest are asymmetric resonance lineshapes known as Fano resonances, which result from interference between discrete mode nanocavity and continuum background modes. Compared to conventional symmetric Lorentzian lineshape, enable novel or improved device structures for use optical switches, sensors, lasers, narrow band filters....
In this paper an evaluation of state-of-the-art binary keypoint descriptors, namely BRIEF, ORB, BRISK and FREAK, is presented. contrast to previous evaluations we used the Stanford Mobile Visual Search (SMVS) data set because descriptors are mainly in mobile applications. This large does provide a lot characteristic transformations for devices, but no ground truth data. The often Oxford only validation purposes. We use ratio-test RANSAC (RANdom SAmple Consensus) present results accuracy,...
Abstract We propose and experimentally demonstrate a small-mode volume bowtie cavity design for all-optical switching applications using waveguide-cavity structure that exploits asymmetric Fano resonance lineshapes. The has mode is five times smaller than conventional (H0-type) photonic crystal point-defect cavities enabling higher nonlinearity faster switching. Blue red-detuned resonant devices based on designs have been fabricated characterized. Measured linear transmission spectra...
We experimentally demonstrate the use of photonic crystal Fano resonances for reshaping optical data signals. show that combination an asymmetric resonance and carrier-induced nonlinear effects in a nanocavity can be used to realize power transfer function, which is key functionality signal regeneration, particularly suppression amplitude fluctuations The experimental results are explained using simulations based on coupled-mode theory also compared case conventional Lorentzian-shaped...
Island-type two-dimensional high-index-contrast grating mirror based on a standard silicon-on-insulator wafer have been experimentally demonstrated. The measured spectra shows bandwidth of ~192 nm with reflectivity over 99% as well polarization independence. Numerical simulations show that the designed has large tolerance to fabrication errors.
We demonstrate all-optical switching using a multi-mode membranized photonic crystal nanocavity exploiting the free-carrier induced dispersion in InP and sharp asymmetric lineshape of Fano resonances. A cavity is designed to sustain two spatially overlapping modes with spectral spacing 18 nm. The measured transmission spectrum fabricated device shows multiple resonances as predicted by optical simulations. capabilities are benchmarked comparing wavelength conversion from 1538.2 nm 1565.2...
We experimentally demonstrate the use of a photonic crystal Fano resonance for carving-out short pulses from long-duration input pulses. This is achieved by exploiting an asymmetric combined with carrier-induced nonlinear effects in membrane structure. The nanocavity concentrates field to very small volume leading efficient shift that carves pulse out pulse. Here, we shortening ∼500 ps and ∼100 long ∼30 ∼20 pulses, respectively. Furthermore, error-free low duty cycle return-to-zero signal...
Summary form only given. Ultra-compact photonic structures that perform high-speed low-energy optical signal processing are essential for enabling integrated chips can meet the growing demand information capacity [1]. Here, we demonstrate all-optical 40 Gbit/s to 10 demultiplexing of an time domain multiplexed (OTDM) using InP crystal switch. The device is realized a membrane structure, where point-defect nanocavity side coupled line-defect waveguide as shown in Fig. 1(a). discrete cavity...
Silicon photonics offers tremendous potential for inexpensive high-yield photonic-electronic integration by enabling fabless fabrication and joint processing of photonic electronic circuitry. as an optical material, however, falls short certain properties that are indispensable high-performance devices. In particular, bulk silicon does not feature any second-order nonlinearity due to crystal symmetry, thereby making efficient electro-optic modulators challenging. These deficiencies can be...
We present our work on photonic crystal membrane devices exploiting Fano resonance between a line-defect waveguide and side coupled nanocavity. Experimental demonstration of fast compact all-optical switches for wavelength-conversion is reported. It shown how the use an asymmetric structure in combination with cavity-enhanced nonlinearity can be used to realize non-reciprocal transmission at ultra-low power large bandwidth. A novel type laser structure, denoted laser, discussed which one...
We report the use of Fano resonances as compact optical switches by exploiting their sharp asymmetric lineshape together with thermo-optic effects. This enables low footprint and efficient on chip integrated systems. The device consists a photonic crystal (PhC) membrane waveguide side-coupled to nanocavity surrounded p-i-n junction. demonstrate thermal tuning an power requirements response time 16.1μs. Their high extinction ratio close spectral separation between maximum minimum transmission...
Fano resonances occur as a result of the interference between discrete mode and continuum modes. We have realized structure using planar indium phosphide photonic crystal membrane device, which consists point-defect nanocavity side-coupled to line-defect waveguide. Compared traditional symmetric Lorentzian lineshape, asymmetric lineshape is characterized by having transmission maximum minimum in close spectral vicinity, leading new opportunities for optical switching, lasing, sensing narrow...
We present investigations on photonic-crystal Fano structures based a cavity-waveguide configuration. show that the use of resonance can enable great improvements in high-speed low-energy all-optical switching and realizing ultra-fast nanolasers.
We demonstrate a frequency comb generator using silicon-organic hybrid (SOH) electrooptic modulators to obtain flat-top spectra.This is the first demonstration of modulator-based on silicon.The viability device confirmed in data transmission experiment achieving an aggregate rate 784 Gbit/s.
We discuss the realization of active photonic devices exploiting Fano resonances in crystal membranes.
In article number 1900054 by Jesper Mork and co-workers, the properties of Fano resonances their use in integrated photonics for realizing optical signal processing are reviewed. The cover image shows a photonic crystal structure, where resonance is used to realize all-optical switching. light beam enters through line-defect waveguide excites nanocavity, concentrated induces nonlinear effects. Interference with field leads switching ultra-small intensity.
We demonstrate frequency comb generation using silicon-organic hybrid (SOH) electro-optic modulators. The combs are used for WDM data transmission at terabit/s rates and distances of up to 300 km.
We give an overview on our recent achievements in the field of SOH integration, covering in-device electro-optic coefficients r <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">33</sub> excess 200 pm/V, highly efficient Mach-Zehnder modulators, IQ and modulator-based frequency comb generators.
We demonstrate a novel optical receiver for direct-detection of QPSK signals using microring-based photonic integrated circuit. The signal is converted into PAM7 electrical signal, and demodulated without the need local oscillator.
We demonstrate a novel optical receiver for direct-detection of QPSK signals using microring-based photonic integrated circuit. The signal is converted into PAM7 electrical signal, and demodulated without the need local oscillator.
We show that Fano resonances can be realized in photonic crystal membrane structures by coupling line-defect waveguides and point-defect nanocavities. The resonance exploited to realize optical switches with very small switching energy, as well lasers, generate short pulses.
We present our recent experimental work involving nanocavities which enable efficient light-matter interaction in small optical mode volumes. To achieve this, we investigated photonic crystal membrane platforms for designing high-quality (Q) factor and planar waveguides. Particularly, discuss waveguide-nanocavity coupled systems realization of asymmetric Fano resonances are characterized by having transmission maximum minimum close spectral separation (~1nm) suitable switching applications.