50 Gb/s Silicon Photonics Receiver With Low Insertion Loss

Author

Littlejohns, Callum G. ; Youfang Hu ; Gardes, Frederic Y. ; Thomson, David J. ; Reynolds, Scott A. ; Mashanovich, Goran Z. ; Reed, Graham T.

Author_Institution

Optoelectron. Res. Centre, Univ. of Southampton, Southampton, UK

Volume

26

Issue

7

fYear

2014

fDate

1-Apr-14

Firstpage

714

Lastpage

717

Abstract

Optical (de)multiplexers that can provide low insertion loss, low crosstalk, high thermal stability, and insensitivity to fabrication tolerances are essential components for silicon photonics integration. In this letter, we demonstrate the integration of an angled multimode interferometer coarse wavelength division multiplexer with germanium p-i-n photodetectors to form a 50 Gb/s receiver with a low insertion loss of <;-0.5 dB and crosstalk of <;-15 dB. The angled multimode interferometer has the flexibility to be designed on a platform with a wide range of waveguide thicknesses with little variation in performance, which allows for the optimization of other optical components in the photonics integrated circuit.

Keywords

elemental semiconductors; germanium; integrated optics; integrated optoelectronics; light interferometers; multiplexing equipment; optical crosstalk; optical fabrication; optical losses; optical receivers; optical waveguide components; p-i-n photodiodes; photodetectors; silicon; silicon-on-insulator; thermal stability; wavelength division multiplexing; Ge; Si; angled multimode interferometer coarse wavelength division multiplexer; bit rate 50 Gbit/s; fabrication tolerances; germanium p-i-n photodetectors; high thermal stability; low crosstalk; low insertion loss; optical component optimization; optical multiplexers; photonics integrated circuit; silicon photonics integration; silicon photonics receiver; waveguide thicknesses; Germanium; Optical losses; Optical waveguides; Photodetectors; Photonics; Receivers; Silicon; Germanium; integrated optoelectronics; lithography; loss measurement; multimode waveguides; optical waveguide components; photodetectors; silicon on insulator technology; waveguide theory; wavelength division multiplexing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2303578

Filename

6728630