We present the operations mechanism of different types of all-optical modulators with various configurations, such as fiber-integrated and free-space ones. We also discuss the challenges and opportunities faced by all-optical modulation, as well as offer some future perspectives for the development ...
The high SPP field confinement and high QD-absorption cross-section enable optical modulation at low power densities (10Wcm) in micrometre-scale planar devices. 展开 关键词: Cadmium Selenide Quantum Dots All-Optical Modulation Plasmonics Information Processing Surface Plasmon Polaritons Photonics ...
We have realized a novel optical modulation format conversion using double-sideband suppressed-carrier modulation. An optical wideband frequency-shift-keying (FSK) signal, generated by an external FSK modulator, can be directly converted into an optical phase-shift-keying (PSK) signal, where the FSK...
databases selected: multiple databases terahertz all-optical modulation in a silicon-polymer hybrid system M Hochberg,T Baehr-Jones,G Wang,... 被引量: 0发表: 2019年 Terahertz all-optical modulation in a silicon-polymer hybrid system. Although gigahertz-scale free-carrier modulators have been ...
摘要: We study analytically all-optical modulation by cascading in type II second-harmonic generation and show that this configuration is promising for all-optical signal processing, provided that it is operated near phase matching. Conditions for an effective transistorlike action are derived....
Graphene is an attractive material for all-optical modulation because of its ultrafast optical response and broad spectral coverage. However, all-optical graphene modulators reported so far require high pump fluence due to the ultrashort photo-carrier lifetime and limited absorption in graphene. We pr...
Taking advantage of the tight mode confinement over the entire waveguide length allows us to achieve high Rabi frequencies and all-optical modulation in the μW regime. The speed of such optical switch is in general limited by the lifetime of the F″=2/3/4 levels (that is, the 52P3/2...
The actual absorbed switching power required for a 3 dB modulation depth is measured to be as low as 6 fJ. While the switch-on time is on the order of a few picoseconds, the relaxation time is almost 500 ps and limited by the lifetime of the charge carriers....
However, all of the electrical and all-optical schemes that have been proposed so far for SHG modulation in two-dimensional materials have considerable downsides. On one hand, electrical modulation has been demonstrated in tungsten diselenide (WSe2) monolayers26by tuning the oscillator strength of ne...
ACOUSTICALLOPTICAL MODULATION SCANNING DEVICE 优质文献 相似文献Optical scanning device An optical scanning device includes optical modulation means having an one-dimensional optical modulator array wherein a plurality of optical modulators are arranged one-dimensionally; lighting means; and a scanning optical...