Demonstration of InP-InGaAsP vertical grating-assisted codirectional coupler filters and receivers with tapered coupling coefficient distributions

Author

Jan, Yu-Heng ; Fish, Greg A. ; Coldren, Larry A. ; DenBaars, Steven P.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA

Volume

9

Issue

7

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

994

Lastpage

996

Abstract

In this letter, we demonstrate the first vertical grating-assisted codirectional coupler filter and receiver with a tapered coupling coefficient distribution. The tapering is achieved by modulating the grating duty ratio. By doing so, filter responses with sidelobe suppression ratios (SSR) better than conventional devices are observed. Using this design in an integrated receiver, a record SSR of 16 dB is reported. With perfect input coupling, it is found that the receiver sidelobe levels using this approach can be lower than /spl sim/40 dB.

Keywords

III-V semiconductors; diffraction gratings; gallium arsenide; indium compounds; integrated optics; optical couplers; optical directional couplers; optical receivers; optical waveguide filters; InP-InGaAsP; InP-InGaAsP vertical grating-assisted codirectional coupler filters; filter response; grating duty ratio modulation; integrated receiver; receiver sidelobe levels; sidelobe suppression ratios; tapered coupling coefficient distributions; tunable receivers; Arrayed waveguide gratings; Engineering drawings; Filters; Genetic expression; Indium phosphide; Marine animals; Optical receivers; Optical refraction; Photonic band gap; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.593377

Filename

593377