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Proceedings Paper

High-speed traveling-wave electro-absorption modulators
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Paper Abstract

Electroabsorption modulators (EAM) based on quantum-confined Stark effect (QCSE) in multiplequantum wells (MQW) have been demonstrated to provide high-speed, low drive voltage, and high extinction ratio. They are compact in size and can be monolithically integrated with continuous-wave (CW) lasers. In order to achieve both high speed and low drive-voltage operation, travelling-wave (TW) electrode structures can be used for EAMs. The inherently low impedance of high-speed EAMs may be transformed to values close to the standard 50Ohm impedance using periodic microwave structures with a combination of passive transmission lines with high characteristic impedance and active modulator sections with low impedance. Modulation bandwidths of 100GHz (-3dBe) have been accomplished with electrical reflections lower than -10dB in a 50Ohm system. Transmission at 80Gbit/s with non-return-to-zero (NRZ) code has been demonstrated for InP-based TWEAMs using electronic time-domain multiplexing (ETDM), indicating the possibility of reaching speeds of 100Gbit/s and beyond.

Paper Details

Date Published: 19 July 2006
PDF: 9 pages
Proc. SPIE 6350, Workshop on Optical Components for Broadband Communication, 635004 (19 July 2006); doi: 10.1117/12.693009
Show Author Affiliations
Urban Westergren, Royal Institute of Technology (Sweden)
Kista Photonics Research Ctr. (Sweden)
Yichuan Yu, Royal Institute of Technology (Sweden)
Kista Photonics Research Ctr. (Sweden)
Zhejiang Univ. (China)
Lars Thylén, Royal Institute of Technology (Sweden)
Kista Photonics Research Ctr. (Sweden)
Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 6350:
Workshop on Optical Components for Broadband Communication
Pierre-Yves Fonjallaz; Thomas P. Pearsall, Editor(s)

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