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This paper reports a Nanoelectromechanical System (NEMS) Variable Optical Attenuator (VOA) driven by the optical gradient force. The VOA is realized via a waveguide based directional coupler. The gap in the directional coupler is controlled via an optical force driven actuator. The doubly-clamped silicon beam actuator is controlled by tuning the wavelength of control light. The signal light can be...
Microparticle trapping and manipulation using the optical force in double coupled ring resonator (DCRR) through wavelength tuning is reported in this paper. The DCRR consists of two coupled identical rings, and a waveguide that is side-coupled to the two rings. The microparticles are propelled by optical radiation force and trapped by optical gradient force, which are both generated by the evanescent...
This paper reports a new design of MEMS variable optical attenuator (VOA) that makes use of a pair of parabolic mirrors as the retro-reflector in the horizontal plane and a normal fiber as the rod lens to focus in the vertical plane. It is advantageous over the conventional co-axial VOAs since it allows the fibers to be arranged in parallel and is thus convenient for the packaging. The parabolic mirrors...
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