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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 23, Iss. 24 — Dec. 15, 1998
  • pp: 1880–1882

Waveguide second-harmonic generation device with broadened flat quasi-phase-matching response by use of a grating structure with located phase shifts

Kiminori Mizuuchi and Kazuhisa Yamamoto  »View Author Affiliations


Optics Letters, Vol. 23, Issue 24, pp. 1880-1882 (1998)
http://dx.doi.org/10.1364/OL.23.001880


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Abstract

We report on a theoretical analysis and experiments for bandwidth broadening in quasi-phase-matched (QPM) second-harmonic generation (SHG).We used phase-shifted segments of a periodic grating to obtain a spectrally broadened, nearly flat response simultaneously with high conversion efficiency. We used an x-cut MgO:LiNbO3 QPM waveguide in our analysis and experiments. The spectral range of the 850-nm fundamental for which SHG conversion exceeded 0.95 of the maximum value broadened from 0.02 to 0.12 nm when a 1-cm-long grating was divided into three segments with optimum phase shift. SHG conversion efficiency was 300%/W for this waveguide. The SHG efficiency and phase-matching characteristics showed good agreement with theoretical results.

© 1998 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides

Citation
Kiminori Mizuuchi and Kazuhisa Yamamoto, "Waveguide second-harmonic generation device with broadened flat quasi-phase-matching response by use of a grating structure with located phase shifts," Opt. Lett. 23, 1880-1882 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-24-1880

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