DocumentCode
1266212
Title
Virtually imaged phased array with graded reflectivity
Author
Shirasaki, M. ; Akhter, A.N. ; Lin, C.
Author_Institution
MIT, Cambridge, MA, USA
Volume
11
Issue
11
fYear
1999
Firstpage
1443
Lastpage
1445
Abstract
A virtually imaged phased array (VIPA) can produce large angular dispersion, i.e., change in output angle with change in wavelength. The insertion loss and crosstalk of the VIPA demultiplexer are analyzed. It is shown that both characteristics are significantly improved by modifying the reflectivity on the VIPA element. With a graded reflectivity instead of a uniform reflectivity, the mode coupling efficiency to the output fiber is improved from 80%99.5% and the crosstalk Is reduced from -23 to -59 dB.
Keywords
demultiplexing equipment; optical arrays; optical crosstalk; optical fibre couplers; optical fibre dispersion; optical images; reflectivity; VIPA demultiplexer; VIPA element; crosstalk; graded reflectivity; insertion loss; large angular dispersion; mode coupling efficiency; output fiber coupling; reflectivity; uniform reflectivity; virtually imaged phased array; Crosstalk; Diffraction gratings; Optical diffraction; Optical fiber dispersion; Optical propagation; Optical surface waves; Optical waveguides; Phased arrays; Reflectivity; Wavelength division multiplexing;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/68.803073
Filename
803073
Link To Document