Multiple noncritical phase-matchings in biaxial KTP crystal

• Дата: 2006
• Автори: Zadorozhnii, V.I., Kornienko, M.E., Sidenko, T.S.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2006
• Назва видання: Functional Materials
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/139960
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Multiple noncritical phase-matchings in biaxial KTP crystal / V.I. Zadorozhnii, M.E. Kornienko, T.S. Sidenko // Functional Materials. — 2006. — Т. 13, № 1. — С. 164-172. — Бібліогр.: 23 назв. — англ.

А general approach is developed and conditions of noncritical phase matchings (РМ) of different multiplicity for the sum frequency generation process are analyzed taking a biaxial КТР crystal as an example. The approach is based on the consideration of general properties of a РМ surface constructed in the frequency and angle coordinates, analysis of their singular lines and intersection points of those lines. The lines of non-criticality in signal frequency or in the propagation angles of the interacting waves have been consid- ered on the РМ surface. The classification of double-uncritical (in frequency and one of the angles or in two angles) РМs is proposed. The possibility to realize a triple non-criti- cality in three independent quantities, for example, frequency and two angles, has been shown. It is found that the double non-criticality (in frequency and IR signal divergence) region can be scanned over the whole transparency range of КТР under frequency tuning of the long-wavelength laser pumping. Мultiple non-critical РМs allow visualizing the broadband IR spectra and IR images.