Effects of surface roughness on the performance of an etched diffraction grating demultiplexer

• The fabrication tolerance of surface roughness on the performance [such as the insertion loss, the polarization-dependent loss (PDL), and the chromatic dispersion] of an etched diffraction grating demultiplexer is analyzed by using an accurate method of moments. The results show that both the insertion loss and the chromatic dispersion rapidly increase as the roughness of the grating facets increases. Appropriate residual roughness of the shaded facets can reduce the PDL of the demultiplexer, and the mechanism for the existence of an optimal residual roughness is explained.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)

Nyckelord

Demultiplexing

Diffraction

Insertion losses

Light polarization

Optical communication

Optical waveguides

Surface roughness

Wavelength division multiplexing

Chromatic dispersion

Diffraction grating demultiplexer

Polarization dependent loss (PDL)

Photonics

Fotonik

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)