Results 31 to 40 of about 106,674 (292)
Ultrafast All-Optical Modulation in Silicon Optical Fibers [PDF]
Frontiers in Optics 2011/Laser Science XXVII, 2011 Degenerate and non-degenerate two-photon absorption based modulation is demonstrated in a hydrogenated amorphous silicon core optical fiber. We show modulation using femtosecond pulses and compare this with theory.
Mehta, P. +6 more
openaire +2 more sources
All-optical $\mathcal{PT}$-symmetric amplitude to phase modulator
, 2015 We study electromagnetic field propagation through a planar three-waveguide coupler with linear gain and loss, in a configuration that is the optical analog of a quantum $\mathcal{PT}$-symmetric system, and provide its closed-form analytic propagator. At
Gutiérrez, Oscar Ignacio Zaragoza +2 more
core +1 more source
Towards a millivolt optical modulator with nano-slot waveguides [PDF]
, 2007 We describe a class of modulator design involving slot waveguides and electro-optic polymer claddings. Such geometries enable massive enhancement of index tuning when compared to more conventional geometries.
Baehr-Jones, Thomas +6 more
core +1 more source
Tungsten disulfide coated side‐polished fibre as polarisation state modulator in all‐optical system
IET Optoelectronics, 2022 In this work, all‐optical polarisation state modulation using a tungsten disulfide (WS2) coated side‐polished fibre (SPF) as modulator is experimentally demonstrated.
Zian Cheak Tiu +5 more
doaj +1 more source
Ultrafast all-optical switching via coherent modulation of metamaterial absorption
, 2014 We report on the demonstration of a femtosecond all-optical modulator providing, without nonlinearity and therefore at arbitrarily low intensity, ultrafast light-by-light control.
Din Ping Tsai +6 more
core +1 more source
APL Photonics, 2023 Spectrally efficient modulation formats become essential for optical network scaling as the demand for routed data streams exceeds the present wavelength-division multiplexing systems’ throughput.
Arijit Misra +4 more
doaj +1 more source
Wideband Microwave Phase Noise Analyzer Based on All-Optical Microwave Signal Processing
IEEE Photonics Journal, 2022 An approach for wideband phase noise measurement of microwave signal sources is proposed based on all-optical microwave signal processing. In the proposed scheme, an optical carrier is sequentially modulated by the signal under test (SUT) in a phase ...
Yifeng Xie +4 more
doaj +1 more source
All-optical phase controlled amplitude modulator
Electronics Letters, 1994 Based on the cascading of second-order nonlinearities, the authors propose a novel scheme for all-optical processing exploiting the tensorial nature of the second-order susceptibility. A weak phase-modulated signal can efficiently modulate the amplitude of a frequency-degenerate orthogonally polarised intense beam through coherent interaction via the ...
ASSANTO, GAETANO, I. Torelli, S. Trillo
openaire +2 more sources
IEEE Photonics Journal, 2018 We propose an analytical model to evaluate three different methods for generating the optical four-level pulse-amplitude-modulation (PAM-4) signal with a standard silicon Mach–Zehnder (M–Z) optical modulator. With this model, we further use
Sizhu Shao +6 more
doaj +1 more source
Phosphorene-assisted silicon photonic modulator with fast response time
Nanophotonics, 2020 All-optical modulators avoid the conversion from external electronic signals to optical signals and thus have the potential to achieve an energy-efficient high-speed photonic system.
Cheng Zhao +8 more
doaj +1 more source