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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 17 — Sep. 1, 2013
  • pp: 3441–3444

Photonic generation of widely tunable and background-free binary phase-coded radio-frequency pulses

Wei Li, Li Xian Wang, Ming Li, and Ning Hua Zhu  »View Author Affiliations


Optics Letters, Vol. 38, Issue 17, pp. 3441-3444 (2013)
http://dx.doi.org/10.1364/OL.38.003441


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Abstract

We present a novel photonic approach to generating widely tunable and background-free binary phase-coded radio-frequency (RF) pulses by cascading a polarization modulator (PolM) and a phase modulator (PM). The PolM is used to produce an optical carrier and two sidebands with orthogonal polarization states. The phase shift θ between the optical carrier and the sidebands is controlled by the electrical driving signal applied to the PM. For θ > π / 2 or < π / 2 , the phase of the detected RF signal is 0 or π , respectively. For θ = π / 2 , there is no RF signal recovered in the photodiode (PD). In this way, binary phase-coded RF pulses can be generated, while the optical power launched to the PD keeps constant. The proposed technique is therefore background free by eliminating the baseband frequency components. Moreover, the carrier frequency of the RF pulses is widely tunable and the π phase shift of the RF signal is independent of the amplitude of the electrical driving signal. The proposed scheme is theoretically analyzed and experimentally verified.

© 2013 Optical Society of America

OCIS Codes
(280.5600) Remote sensing and sensors : Radar
(320.5520) Ultrafast optics : Pulse compression
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 15, 2013
Revised Manuscript: July 25, 2013
Manuscript Accepted: August 6, 2013
Published: August 29, 2013

Citation
Wei Li, Li Xian Wang, Ming Li, and Ning Hua Zhu, "Photonic generation of widely tunable and background-free binary phase-coded radio-frequency pulses," Opt. Lett. 38, 3441-3444 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-17-3441

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