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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 19511–19519

Wide spectral bandwidth electro-absorption modulator using coupled micro-cavity with asymmetric tandem quantum well

Byung Hoon Na, Gun Wu Ju, Hee Ju Choi, Yong Chul Cho, Yong Hwa Park, Chang Young Park, and Yong Tak Lee  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 19511-19519 (2012)

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For reliable three dimensional (3D) imaging system, it is necessary for the optical shutter to have a wide spectral bandwidth operation and enhanced modulation depth. We propose an electro-absorption modulator (EAM) based on coupled Fabry-Perot cavities with micro-cavity (CCMC) which uses asymmetric tandem quantum wells (ATQWs) to obtain improved spectral bandwidth and enhanced modulation depth. Several modulator designs are investigated to obtain improved modulation performance such as wider spectral bandwidth and enhanced modulation depth. It was found that among all the studied modulator geometries, CCMC structure with ATQWs provides the widest spectral bandwidth of 9.6nm and high modulation depth in excess of 50% at −24V, which is good agreement with theoretical calculations. These results suggest that EAM has excellent potential as optical shutter for 3D imaging application.

© 2012 OSA

OCIS Codes
(100.6890) Image processing : Three-dimensional image processing
(230.2090) Optical devices : Electro-optical devices
(230.4110) Optical devices : Modulators
(230.4205) Optical devices : Multiple quantum well (MQW) modulators

ToC Category:
Optical Devices

Original Manuscript: June 12, 2012
Revised Manuscript: July 20, 2012
Manuscript Accepted: August 6, 2012
Published: August 10, 2012

Byung Hoon Na, Gun Wu Ju, Hee Ju Choi, Yong Chul Cho, Yong Hwa Park, Chang Young Park, and Yong Tak Lee, "Wide spectral bandwidth electro-absorption modulator using coupled micro-cavity with asymmetric tandem quantum well," Opt. Express 20, 19511-19519 (2012)

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