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Proceedings Paper

Quality evaluation of quasi-phase-matched devices by far-field diffraction pattern analysis
Author(s): Krishnamoorthy Pandiyan; Yeon Sook Kang; Hwan Hong Lim; Byeong Joo Kim; Myoungsik Cha
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Paper Abstract

Periodically poled ferroelectric crystals form highly efficient quasi-phase matched optical frequency conversion devices. For optimal performance of such devices, accurate period and duty-cycle are required throughout the poled region. For the quality evaluation we demonstrate a simple and a powerful technique using far-field diffraction measurement. Periodically poled lithium niobates were fabricated and etched out to reveal a surface-relief grating. The far-field diffraction pattern was analyzed to obtain statistical information for the duty-cycle. We explored the equivalence between the linear diffraction experiment and the conventional second-harmonic generation method for poling quality evaluation, through the Fourier-transform of the spatial modulation of domains.

Paper Details

Date Published: 24 February 2009
PDF: 8 pages
Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 71970R (24 February 2009); doi: 10.1117/12.808464
Show Author Affiliations
Krishnamoorthy Pandiyan, Pusan National Univ. (Korea, Republic of)
Yeon Sook Kang, Pusan National Univ. (Korea, Republic of)
Hwan Hong Lim, Pusan National Univ. (Korea, Republic of)
Byeong Joo Kim, Pusan National Univ. (Korea, Republic of)
Myoungsik Cha, Pusan National Univ. (Korea, Republic of)


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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