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Optics Letters

Optics Letters


  • Vol. 36, Iss. 6 — Mar. 15, 2011
  • pp: 864–866

Efficiency pedestal in quasi-phase-matching devices with random duty-cycle errors

J. S. Pelc, C. R. Phillips, D. Chang, C. Langrock, and M. M. Fejer  »View Author Affiliations

Optics Letters, Vol. 36, Issue 6, pp. 864-866 (2011)

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It is shown that random duty-cycle errors in quasi-phase-matching (QPM) nonlinear optical devices enhance the efficiency of processes far from the QPM peak. An analytical theory is shown to agree well with numerical solutions of second-harmonic generation (SHG) in disordered QPM gratings. The measured efficiency of 1550 nm band SHG in a periodically poled lithium niobate (PPLN) waveguide away from the QPM peak agrees with observations of domain disorder in a PPLN wafer by Zygo interferometry. If suppression of parasitic nonlinear interactions is important in a specific application of QPM devices, control of random duty-cycle errors is critical.

© 2011 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices

ToC Category:
Nonlinear Optics

Original Manuscript: November 23, 2010
Manuscript Accepted: January 17, 2011
Published: March 9, 2011

J. S. Pelc, C. R. Phillips, D. Chang, C. Langrock, and M. M. Fejer, "Efficiency pedestal in quasi-phase-matching devices with random duty-cycle errors," Opt. Lett. 36, 864-866 (2011)

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