Polarised light in circular and elliptical optical fibers

Imperial Users onl

MEMS actuated small scale retroreflectors for free space optical communications

This paper describes the use of electrothermal MEMS actuation and small-scale spherical retroreflectors to produce a retroreflective optical phase modulator

MEMS actuated spherical retroreflector for free-space optical communications

An optical MEMS retroreflective phase modulator comprising a silicon MEMS microactuated platform to which a spherical retroreflector is attached has been investigated. The steady state and dynamic behaviour of the MEMS modulator have been experimentally measured when two different sizes of spherical retroreflectors are used. Dynamic testing shows a dominant resonant frequency response at around 200 Hz, which matches finite-element analysis for the structure