[PDF]    http://dx.doi.org/10.3952/lithjphys.48402

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 48, 313–318 (2008)


DIFFERENCE FREQUENCY GENERATION BETWEEN THE OUTPUT WAVES OF THE PP-MgO:LN OPTICAL PARAMETRIC OSCILLATOR
Viktoras Vaičikauskasa, Marius Kaučikasa,b, and Zenonas Kuprionisb
aInstitute of Physics, Savanorių 231, LT-02300 Vilnius, Lithuania
E-mail: m.kaucikas@ekspla.com
bEKSPLA, Savanorių 231, LT-02300 Vilnius, Lithuania

Received 10 July 2008; accepted 18 September 2008

The difference frequency generation in the AgGaSe2 crystal between output waves of a periodically poled MgO doped lithium niobate (PP-MgO:LN) optical parametric oscillator (OPO) is described in this paper. The wavelength of the generated radiation is tunable from 6 to 13 μ\mum with the average generated power in the range of several microwatts. The set-up allows a rapid tuning of the wavelength in the limited region of spectra without changing the temperature of the PP-MgO:LN crystal. A typical spectral linewidth of 5 cm–1 makes this source suitable for spectrometry of complex molecules under atmospheric conditions. The measured spectrum of the acetone vapour is presented to confirm this fact.
Keywords: nonlinear optics, optical frequency converters, infrared sources
PACS: 42.65.-k, 42.79.Nv, 42.72.Ai


SKIRTUMINIO DAŽNIO GENERAVIMAS SĄVEIKAUJANT PP-MgO:LN PARAMETRINIO ŠVIESOS GENERATORIAUS SIGNALINEI IR ŠALUTINEI BANGOMS
Viktoras Vaičikauskasa, Marius Kaučikasa,b, Zenonas Kuprionisb
aFizikos institutas, Vilnius, Lietuva
bUAB EKSPLA, Vilnius, Lietuva

Aprašomas skirtuminio dažnio generavimas AgGaSe2 kristale tarp PP-MgO:LN parametrinio šviesos generatoriaus signalinės ir šalutinės bangų. Generuojamos spinduliuotės bangos ilgis yra derinamas nuo 6 iki 13 μ\mum, o vidutinė jos galia siekia keletą milivatų. Aprašyta šaltinio konfigūracija leidžia greitai keisti spinduliuotės bangos ilgį, nekeičiant PP-MgO:LN kristalo temperatūros. Būdingasis generuojamos spinduliuotės spektro plotis yra 5 cm–1, o tai leidžia naudoti šį šaltinį sudėtingų molekulių spektroskopijai atmosferos sąlygomis. Tai iliustruojama acetono garų pavyzdžiu.


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