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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 4 — Feb. 15, 2010
  • pp: 3379–3384

Novel Ultra-wideband (UWB) Photonic Generation through photodetection and cross-absorption modulation in a single Electroabsorption Modulator

Tsu-Hsiu Wu, Jui-pin Wu, and Yi-Jen Chiu  »View Author Affiliations


Optics Express, Vol. 18, Issue 4, pp. 3379-3384 (2010)
http://dx.doi.org/10.1364/OE.18.003379


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Abstract

We propose and demonstrate, by proof of concept, a novel method of ultra-wide band (UWB) photonic generation using photodetection and cross-absorption modulation (XAM) of multiple quantum wells (MQW) in a single short-terminated electroabsorption modulator (SEAM). As an optical pump pulse excite the MQWs of SEAM waveguide, the probe light pulse with the same polarity can be generated through XAM, simultaneously creating photocurrent pulse propagating along the waveguide. Using the short termination of SEAM accompanied by the delayed microwave line, the photocurrent pulse can be reversed in polarity and re-modulated the waveguide, forming a monocycle UWB optical pulse. An 89ps cycle of monocycle pulse with 114% fractional bandwidth is obtained, where the electrical power spectrum centered at 4GHz of frequency ranges from 0.1GHz to 8GHz for −10dB drops. Meanwhile, the generation processing is also confirmed by observing the same cycle of monocycle electrical pulse from the photodetection of SEAM. The whole optical processing is performed inside a compact semiconductor device, suggesting the optoelectronic integration template has a potential for the application of UWB photonic generation.

© 2010 OSA

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(230.0250) Optical devices : Optoelectronics
(350.4010) Other areas of optics : Microwaves
(060.5625) Fiber optics and optical communications : Radio frequency photonics
(230.7405) Optical devices : Wavelength conversion devices

ToC Category:
Optoelectronics

History
Original Manuscript: December 4, 2009
Revised Manuscript: January 15, 2010
Manuscript Accepted: January 18, 2010
Published: February 2, 2010

Citation
Tsu-Hsiu Wu, Jui-pin Wu, and Yi-Jen Chiu, "Novel ultra-wideband (UWB) photonic generation through photodetection and cross-absorption modulation in a single electroabsorption modulator," Opt. Express 18, 3379-3384 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-4-3379


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References

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