Spectral width requirement for measuring return loss of arrayed waveguide gratings by using optical low coherence reflectometry

Author

Takada, K. ; Okamoto, K.

Author_Institution

NTT Photonics Labs., Nippon Telegraph. Corp., Ibaraki, Japan

Volume

35

Issue

20

fYear

1999

fDate

9/30/1999 12:00:00 AM

Firstpage

1734

Lastpage

1736

Abstract

The reflection from a half wave plate incorporated in an arrayed waveguide grating (AWG) for polarisation-independent operation has a strong wavelength dependence. The error is derived as a function of the full width at half maximum (FWHM) of the Gaussian light spectrum when the reflectivity at the plate is measured with an optical low coherence reflectometer. This error can be reduced to <4 dB when the FWHM is less than the channel spacing of the AWG

Keywords

diffraction gratings; light reflection; measurement errors; optical arrays; optical elements; optical loss measurement; optical waveguide components; reflectivity; reflectometry; Gaussian light spectrum; arrayed waveguide grating; arrayed waveguide gratings; channel spacing; error; full width at half maximum; half wave plate; optical low coherence reflectometer; optical low coherence reflectometry; polarisation-independent operation; reflection; reflectivity; return loss; spectral width requirement; wavelength dependence;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19991184

Filename

811151