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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 13 — Jul. 1, 2013
  • pp: 2237–2239

Polarization-insensitive photonic microwave downconversion

Xiaowen Gu, Shilong Pan, Zhenzhou Tang, Dan Zhu, Ronghui Guo, and Yongjiu Zhao  »View Author Affiliations


Optics Letters, Vol. 38, Issue 13, pp. 2237-2239 (2013)
http://dx.doi.org/10.1364/OL.38.002237


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Abstract

A polarization-insensitive photonic microwave downconverter is proposed and demonstrated, which is comprised of a polarization beam splitter, two Mach–Zehnder modulators (MZMs), and a balanced photodetector. By biasing the MZMs at the quadrature bias points with opposing modulation slopes, the performance of the proposed photonic microwave downconverter is almost independent of the polarization state of the optical microwave signal for down conversion. An experiment is performed, which shows that the polarization dependent loss of the proposed downconverter is less than 0.06 dB. The downconverter is also evaluated in a radio-over-fiber link. A 20 GHz RF signal with 20 MBaud 16 quadrature amplitude modulation baseband data is successfully downconverted to a 1 GHz IF signal. When the polarization state of the input optical microwave signal is adjusted, the variation of the error vector magnitude of the downconverted signal is less than 0.4%.

© 2013 Optical Society of America

OCIS Codes
(350.4010) Other areas of optics : Microwaves
(060.5625) Fiber optics and optical communications : Radio frequency photonics
(060.2840) Fiber optics and optical communications : Heterodyne

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 2, 2013
Revised Manuscript: May 11, 2013
Manuscript Accepted: May 22, 2013
Published: June 24, 2013

Citation
Xiaowen Gu, Shilong Pan, Zhenzhou Tang, Dan Zhu, Ronghui Guo, and Yongjiu Zhao, "Polarization-insensitive photonic microwave downconversion," Opt. Lett. 38, 2237-2239 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-13-2237


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