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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 24873–24879

Photonic generation of ultra-wide-band doublet pulse through monolithic integration of tapered directional coupler and quantum well waveguide

Yu-Zheng Kuo, Jui-Pin Wu, Tsu-Hsiu Wu, and Yi-Jen Chiu  »View Author Affiliations

Optics Express, Vol. 20, Issue 22, pp. 24873-24879 (2012)

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We proposed and demonstrated a novel scheme of photonic ultra-wide-band (UWB) doublet pulse based on monolithic integration of tapered optical-direction coupler (TODC) and multiple-quantum-well (MQW) waveguide. TODC is formed by a top tapered MQW waveguide vertically integrating with an underneath passive waveguide. Through simultaneous field-driven optical index- and absorption- change in MQW, the partial optical coupling in TODC can be used to get a valley-shaped of optical transmission against voltage. Therefore, doublet-enveloped optical pulse can be realized by high-speed and high-efficient conversion of input electrical pulse. By just adjusting bias through MQW, 1530nm photonic UWB doublet optical pulse with 75-ps pulse width, below −41.3dBm power, 125% fractional bandwidth, and 7.5 GHz of −10dB bandwidth has been demonstrated, fitted into FCC requirement (3.1GHz~10.6GHz). Doublet-pulse data transmission generated in optical fiber is also performed for further characterization, exhibiting a successful 1.25Gb/s error-free transmission. It suggests such optoelectronic integration template can be applied for photonic UWB generation in fiber-based communications.

© 2012 OSA

OCIS Codes
(250.3140) Optoelectronics : Integrated optoelectronic circuits
(250.7360) Optoelectronics : Waveguide modulators
(350.4010) Other areas of optics : Microwaves

ToC Category:
Integrated Optics

Original Manuscript: August 23, 2012
Revised Manuscript: September 30, 2012
Manuscript Accepted: October 11, 2012
Published: October 16, 2012

Yu-Zheng Kuo, Jui-Pin Wu, Tsu-Hsiu Wu, and Yi-Jen Chiu, "Photonic generation of ultra-wide-band doublet pulse through monolithic integration of tapered directional coupler and quantum well waveguide," Opt. Express 20, 24873-24879 (2012)

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