Evaluation of domain randomness in periodically poled lithium niobate by diffraction noise measurement

Random duty-cycle errors (RDE) in ferroelectric quasi-phase-matching (QPM) devices not only affect the frequency conversion efficiency, but also generate non-phase-matched parasitic noise that can be detrimental to some applications. We demonstrate an accurate but simple method for measuring the RDE...

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Bibliographic Details
Published in:Optics express 2013-12, Vol.21 (25), p.30221-30226
Main Authors: Dwivedi, Prashant Povel, Choi, Hee Joo, Kim, Byoung Joo, Cha, Myoungsik
Format: Article
Language:English
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Summary:Random duty-cycle errors (RDE) in ferroelectric quasi-phase-matching (QPM) devices not only affect the frequency conversion efficiency, but also generate non-phase-matched parasitic noise that can be detrimental to some applications. We demonstrate an accurate but simple method for measuring the RDE in periodically poled lithium niobate. Due to the equivalence between the undepleted harmonic generation spectrum and the diffraction pattern from the QPM grating, we employed linear diffraction measurement which is much simpler than tunable harmonic generation experiments [J. S. Pelc, et al., Opt. Lett.36, 864-866 (2011)]. As a result, we could relate the RDE for the QPM device to the relative noise intensity between the diffraction orders.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.030221