Compact Electroabsorption Modulators for Photonic Integrated Circuits, Using an Isolated Pedestal Contact Scheme

Author

Daunt, Chris L M ; O´Callaghan, James ; Lee, Ko-Hsin ; Yang, Hua ; Young, Robert J. ; Thomas, Kevin ; Pelucchi, Emanuele ; Corbett, Brian ; Peters, Frank H.

Author_Institution

Dept. of Phys., Univ. Coll. Cork, Cork, Ireland

Volume

24

Issue

5

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

356

Lastpage

358

Abstract

We demonstrate a shallow ridge waveguide, lumped element electroabsorption modulator (EAM) based on AlInGaAs multiple quantum wells, operating with input powers up to 8 dBm. The device was isolated between two DC controlled sections, using angled etched slots in the waveguide, minimizing optical feedback, while also providing 40-KΩ resistance between devices. The EAM uses a planar isolated pedestal contact with a benzocyclobutene bridge, allowing for a small contact footprint of just 0.024 mm², while being suitable for flip-chip packaging. The parasitic capacitance was measured to be 19.6 fF, and the EAM has a f_3dB bandwidth of 42 GHz.

Keywords

electroabsorption; flip-chip devices; integrated optics; optical feedback; optical modulation; optical waveguides; DC controlled sections; angled etched slots; benzocyclobutene bridge; compact electroabsorption modulators; flip chip packaging; isolated pedestal contact scheme; lumped element electroabsorption modulator; multiple quantum wells; optical feedback; parasitic capacitance; photonic integrated circuits; planar isolated pedestal contact; shallow ridge waveguide; Capacitance measurement; Electrical resistance measurement; Extinction ratio; Modulation; Optical waveguides; Quantum well devices; Resistance; Electroabsorption modulator (EAM); integrated optoelectronics; optical device fabrication;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2179025

Filename

6099556