6533b831fe1ef96bd1298f70
RESEARCH PRODUCT
Optical retarder system with programmable spectral retardance.
Pascuala García-martínezJosé Luis MartínezJosé Vicente CarriónJuan CamposIgnacio MorenoMaría Del Mar Sánchez-lópezsubject
SiliconSpatial light modulatorMaterials sciencebusiness.industrySpectrum AnalysisPhysics::OpticsOptical DevicesPhysics::Classical PhysicsRetarderWaveplateAtomic and Molecular Physics and Opticslaw.inventionLiquid CrystalsLiquid crystal on siliconWavelengthLight intensityOpticslawLight beambusinessBeam splitterdescription
An optical system that works as a retarder waveplate with programmable spectral retardance is proposed. The system is based on a pixelated liquid crystal on silicon (LCoS) spatial light modulator (SLM). The input light beam is spectrally dispersed and different spectral components are projected onto different pixels of the LCoS-SLM. A different retardance is then addressed for each pixel, adapted to the incoming wavelength. Light reflected from the SLM is then recombined by the same setup. In this way a programmable polarization spectrum can be encoded. We illustrate the broadband characterization that is required for proper use of the system. Then several examples are shown, including spectral compensation to yield retarders with constant retardance, retarders with abrupt changes in the spectral retardance function, or bandpass variable retarder filters. The system is also demonstrated to provide programmable light spectrum generation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-11-01 | Optics letters |