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Proceedings Paper

Angular quasi-phase-matching: theory and first experiments
Author(s): Pierre Brand; Benoît Boulanger; Patricia Segonds; Yannick Petit; Corinne Félix; Bertrand Ménaert; Takunori Taira; Hideki Ishizuki
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Paper Abstract

Advances in the periodic poling process have led to longer and larger PPLN crystals. Today it is also possible to prepare PPLN samples with a thickness of about 5 mm which allows the use of pump laser beams with a larger aperture, and so with a higher energy. Moreover thicker samples give the possibility to consider quasi-phase-matching (QPM) at any angle with respect to the grating periodicity. We called this scheme angular quasi-phase-matching (AQPM). In order to illustrate the potentiality of AQPM, we compared its tunability and spectral acceptance with that of BPM in the case of second harmonic generation (SHG) and difference frequency generation (DFG) in the periodically poled negative uniaxial 5%MgO:PPLN crystal, with a grating periodicity Λ = 32.2 μm We found that AQPM exhibits complementary spectral range and acceptances compared with BPM. We experimentally performed the first validation of the theory of AQPM by cutting 5%MgO:PPLN as a polished sphere with a diameter of 3.9 mm in order to propagate beams in any direction of the crystal by keeping normal incidence. It allowed us to measure any SHG and DFG AQPM direction, with the associated efficiencies, the spectral and angular acceptances. They are reported with calculations.

Paper Details

Date Published: 23 February 2009
PDF: 15 pages
Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 719706 (23 February 2009); doi: 10.1117/12.810138
Show Author Affiliations
Pierre Brand, Institut Néel, CNRS, Univ. Joseph Fourier (France)
Benoît Boulanger, Institut Néel, CNRS, Univ. Joseph Fourier (France)
Patricia Segonds, Institut Néel, CNRS, Univ. Joseph Fourier (France)
Yannick Petit, Institut Néel, CNRS, Univ. Joseph Fourier (France)
Univ. de Genève (Switzerland)
Corinne Félix, Institut Néel, CNRS, Univ. Joseph Fourier (France)
Bertrand Ménaert, Institut Néel, CNRS, Univ. Joseph Fourier (France)
Takunori Taira, Institute for Molecular Science (Japan)
Hideki Ishizuki, Institute for Molecular Science (Japan)


Published in SPIE Proceedings Vol. 7197:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII
Peter E. Powers, Editor(s)

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