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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 4 — Feb. 1, 2009
  • pp: 658–663

Noise analysis in photonic true time delay systems based on broadband optical source and dispersion components

Xiaoxiao Xue, He Wen, Xiaoping Zheng, Hanyi Zhang, Yili Guo, and Bingkun Zhou  »View Author Affiliations

Applied Optics, Vol. 48, Issue 4, pp. 658-663 (2009)

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The noise in photonic true time delay systems based on broadband optical source and dispersion components is investigated. It is found that the beat noise induced by the optical source begins to dominate and grows far larger than other noise terms quickly, as long as the detected optical power is above some certain value P thr . When the system dispersion is nonzero, the output carrier-to-noise ratio (CNR) will change periodically with the optical bandwidth due to the noise power increment and the dispersion induced radio frequency signal power degradation. The maximum CNR is the peak value of the first period. For a set of specified system conditions, the P thr is calculated to be 21 dBm , and the optimal optical bandwidth is 0.8 nm , at which the maximum CNR is 93.3 dB by considering the noise in a 1 Hz bandwidth. The results are verified experimentally.

© 2009 Optical Society of America

OCIS Codes
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(280.5110) Remote sensing and sensors : Phased-array radar
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics

Original Manuscript: September 25, 2008
Revised Manuscript: December 7, 2008
Manuscript Accepted: December 11, 2008
Published: January 21, 2009

Xiaoxiao Xue, He Wen, Xiaoping Zheng, Hanyi Zhang, Yili Guo, and Bingkun Zhou, "Noise analysis in photonic true time delay systems based on broadband optical source and dispersion components," Appl. Opt. 48, 658-663 (2009)

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