Free-carrier absorption variable optical attenuators and thermal phase shifters formed by an optical waveguide having multiple passes in an intrinsic region

Wavelength locking filter

Silicon-based modulator with different transition zone thicknesses

Wavelength locking filter

Optical pulse clipper for lidar

Optical modulating device and apparatus including the same

Wavelength locking filter

Optical phase shifter, optical interferometer based thereupon, and method of manufacture thereof

Wavelength locking filter

Silicon electro-optical modulator

Wavelength locking filter

Silicon electro-optical modulator

Optical modulator with plasmon based coupling

Optical absorption based device

Optical absorber

Optical modulator, imaging device and display apparatus including a dielectric layer and an electrode comprising graphene

Optical modulator including grapene

Optical modulator including graphene

Evanescent wave absorption based devices

Dynamic wavelength converter

Slow light waveguide