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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 11 — May. 25, 2009
  • pp: 9028–9039

Even-order harmonic cancellation for off-quadrature biased Mach-Zehnder modulator with improved RF metrics using dual wavelength inputs and dual outputs

Preetpaul S. Devgan, John F. Diehl, Vincent J. Urick, Christopher E. Sunderman, and Keith J. Williams  »View Author Affiliations


Optics Express, Vol. 17, Issue 11, pp. 9028-9039 (2009)
http://dx.doi.org/10.1364/OE.17.009028


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Abstract

We present a technique using a dual-output Mach-Zehnder modulator (MZM) with two wavelength inputs, one operating at low-bias and the other operating at high-bias, in order to cancel unwanted even-order harmonics in analog optical links. By using a dual-output MZM, this technique allows for two suppressed optical carriers to be transmitted to the receiver. Combined with optical amplification and balanced differential detection, the RF power of the fundamental is increased by 2 dB while the even-order harmonic is reduced by 47 dB, simultaneously. The RF noise figure and third-order spurious-free dynamic range (SFDR3) are improved by 5.4 dB and 3.6 dB, respectively. Using a wavelength sensitive, low Vπ MZM allows the two wavelengths to be within 5.5 nm of each other for a frequency band from 10 MHz to 100 MHz and 10 nm for 1 GHz.

© 2009 OSA

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4080) Fiber optics and optical communications : Modulation
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 18, 2009
Revised Manuscript: April 23, 2009
Manuscript Accepted: May 10, 2009
Published: May 14, 2009

Citation
Preetpaul S. Devgan, John F. Diehl, Vincent J. Urick, Christopher E. Sunderman, and Keith J. Williams, "Even-order harmonic cancellation for off-quadrature biased Mach-Zehnder modulator with improved RF metrics using dual wavelength inputs and dual outputs," Opt. Express 17, 9028-9039 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-11-9028


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