Optical Modulation - an overview | ScienceDirect Topics
Optical modulation amplitude is defined as the change of transmittance (Δ T) or absorptivity (Δ A) between the colored state and the bleached state of electrochromic materials or devices at a specific wavelength, which is the main parameter used to evaluate the potential application of EC materials and devices.
Optical modulators - ScienceDirect
Jan 1, 2023 · Optical modulation is obtained by converting an electrical signal into an optical signal. This can be achieved either by directly modulating the current of the light source or by an electro-optic (EO) effect via an optical modulator ( Fig. 3.1 ).
Optical Modulation - an overview | ScienceDirect Topics
Optical modulation refers to the modification of the optical properties of a material, such as its refractive index, using an external electrical signal. This enables the manipulation of light propagation through the material for various applications in photonics. AI generated definition based on: Semiconductors and Semimetals, 2019
Optic Modulation - an overview | ScienceDirect Topics
Jan 6, 2012 · This unique property of MZI-based electro-optic modulator has been used to create duobinary optical modulation format in high-speed optical transmission systems, which requires only half the optical bandwidth compared with direct amplitude modulation at the same data rate (Penninckx et al., 1997). 1.6.3 Optical single-side modulation
Efficient optical modulation in ring structure based on Silicon-ITO ...
Oct 15, 2023 · The optical modulation in ring structure based on Si-ITO heterojunction is numerically studied employing Lumerical Charge-transport solver and FDTD-solutions. The one-dimensional accumulation and depletion of free charge-carrier density i.e., holes and electrons across the Si-ITO heterojunctions in the ring structure is calculated by the ...
Optical modulators based on 2D materials - ScienceDirect
Jan 1, 2020 · Optical modulation 1 is a process to load information onto the light beam. Generally, modulation can be achieved by altering several attributes of the light beam, including the direction, amplitude, phase, frequency, and polarization state, as shown in Fig. 2.1.
Optical Phase Modulation - an overview | ScienceDirect Topics
Jan 5, 2012 · V.B Optical Phase Modulation. When the carrier-density in an SOA is modulated either via a change in the drive current, or a change in the optical power level, the refractive index of the device changes and this results in a change in phase shift of the field passing through the amplifier. This effect is optical phase modulation. In some ...
Al nanowire-embedded silicon for broadband optical modulation: …
Oct 1, 2024 · Broadband optical modulation for silicon via introducing Al nanowires. • One-step magnetron co-sputtering method for Si-Al nanowire fabrication. • Ion-impact induced nanowire forming window broadening and structural regulation. • Controllable full-band optical response with flexible nanowire structures.
Optical Modulation Index - an overview | ScienceDirect Topics
The amount of optical cross-phase modulation, and thus intensity modulation after interaction with the dispersion, varies linearly with the level of the interfering optical signal. Thus, after detection this degradation factor will vary 2 dB for every 1-dB change in …
Optical modulators - ScienceDirect
Jan 1, 2023 · An Innovative method for adjustable broadband THz to Mid-IR optical modulator using Graphene Gratings surface plasmon Fabry–Perot resonances with low insertion loss, high speed and modulation depth Optics Communications, Volume 530, 2023, Article 129200