Design and performances of logarithmic wavelength demultiplexers

Author

Cincotti, Gabriella ; Neri, Alessandro

Author_Institution

Dept. of Appl. Electron., Univ. of Rome TRE, Roma, Italy

Volume

16

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

1325

Lastpage

1327

Abstract

We investigate the performance and furnish design guideline for a 1×N router realized as a tree of Mach-Zehnder interferometers, with free-spectral ranges that follow a logarithmic progression. We show that the crosstalk can be reduced and the channel passband flattened by inserting all-pass (AP) filters in the interferometers arms, with a suitable choice of the coupling ratios. The proposed device is inherently low loss and the chromatic dispersion introduced by the AP filters can be easily compensated. Two different realizations are investigated, and the power penalties induced by losses and dispersion are evaluated numerically.

Keywords

Mach-Zehnder interferometers; all-pass filters; band-pass filters; demultiplexing; demultiplexing equipment; optical communication equipment; optical crosstalk; optical filters; optical losses; telecommunication network routing; wavelength division multiplexing; 1×N router; Mach-Zehnder interferometers; all-pass filters; channel passband filters; chromatic dispersion; crosstalk; dense wavelength-division multiplexing; free-spectral ranges; furnish design guideline; logarithmic wavelength demultiplexers; power penalty; Arm; Band pass filters; Couplers; Crosstalk; Digital filters; Mach-Zehnder interferometers; Optical filters; Optical losses; Passband; Propagation losses;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2004.826032

Filename

1291499