Integrating-sphere diffuser for wireless infrared communication

Author

Pohl, V. ; Jungnickel, V. ; von Helmolt, C.

Author_Institution

Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany

Volume

147

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

281

Lastpage

285

Abstract

The application of an integrating sphere (IS) as a diffuser in a wireless infrared (IR) network is investigated. Going beyond the simplified analytical model, it is shown that ray-tracing simulations provide realistic data for the optical insertion loss: the transfer function and the far-field light distribution. As an example, a sphere diffuser for a 155 Mbit/s 16-PPM IR transmitter is investigated with an insertion loss of 0.66 dB, a cutoff frequency of 570 MHz and a 104° full width at half-maximum (FWHM) angle of the intensity distribution. The device has also been manufactured using a proprietary material and good agreement between simulation and experimental data is found. A method to increase the FWHM angle and some aspects of eye safety are discussed

Keywords

optical communication; optical losses; optical transmitters; photometry; ray tracing; safety; 155 Mbit/s; 570 MHz; FWHM angle; IR transmitter; eye safety; far-field light distribution; half-maximum angle; insertion loss; integrating-sphere diffuser; intensity distribution; optical insertion loss; ray-tracing simulations; sphere diffuser; transfer function; wireless IR network; wireless infrared communication;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:20000564

Filename

871125