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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 7446–7457

Photonic generation of arbitrarily phase-modulated microwave signals based on a single DDMZM

Wei Li, Wen Ting Wang, Wen Hui Sun, Li Xian Wang, and Ning Hua Zhu  »View Author Affiliations


Optics Express, Vol. 22, Issue 7, pp. 7446-7457 (2014)
http://dx.doi.org/10.1364/OE.22.007446


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Abstract

We propose and demonstrate a compact and cost-effective photonic approach to generate arbitrarily phase-modulated microwave signals using a conventional dual-drive Mach-Zehnder modulator (DDMZM). One arm (arm1) of the DDMZM is driven by a sinusoidal microwave signal whose power is optimized to suppress the optical carrier, while the other arm (arm2) of the DDMZM is driven by a coding signal. In this way, the phase-modulated optical carrier from the arm2 and the sidebands from the arm1 are combined together at the output of the DDMZM. Binary phase-coded microwave pulses which are free from the baseband frequency components can be generated when the coding signal is a three-level signal. In this case, the precise π phase shift of the microwave signal is independent of the amplitude of the coding signal. Moreover, arbitrarily phase-modulated microwave signals can be generated when an optical bandpass filter is attached after the DDMZM to achieve optical single-sideband modulation. The proposed approach is theoretically analyzed and experimentally verified. The binary phase-coded microwave pulses, quaternary phase-coded microwave signal, and linearly frequency-chirped microwave signal are experimentally generated. The simulated and the experimental results agree very well with each other.

© 2014 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:
Optoelectronics

History
Original Manuscript: January 20, 2014
Revised Manuscript: March 6, 2014
Manuscript Accepted: March 10, 2014
Published: March 24, 2014

Citation
Wei Li, Wen Ting Wang, Wen Hui Sun, Li Xian Wang, and Ning Hua Zhu, "Photonic generation of arbitrarily phase-modulated microwave signals based on a single DDMZM," Opt. Express 22, 7446-7457 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-7-7446


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