Properties of the ions of the iron transition group in the lattice of single-crystalline lithium niobate

Arsenev, P. A.; Baranov, B. A.

doi:10.1002/pssa.2210090233

Cited by 31 publications

(10 citation statements)

References 1 publication

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“…However, a redistribution of electrons from Fe 2 centers would not yield an increased absorption coefficient at 488 nm, since Fe 2 centers exhibit a larger photon-absorption cross section at this wavelength than any polaron state [7,14]. With this mechanism, the crystals should rather favor bleaching at 488 nm.…”

mentioning

confidence: 91%

Green-induced blue absorption in MgO-doped lithium niobate crystals

et al. 2013

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We have measured the intrinsic and 532 nm-induced optical absorption of 5 mol. % MgO-doped lithium niobate crystals at 488 nm wavelength. The measurements have been conducted employing a photothermal common-path interferometer. The absorption at 488 nm increases on simultaneous illumination with 532 nm light. This induced absorption rises linearly with the stimulating 532 nm radiation power and saturates for intensities larger than 50 kW/cm(2). A model developed recently, considering the excitation of electrons from levels near the valence band into iron centers, is applied to explain the observations.

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mentioning

confidence: 91%

Green-induced blue absorption in MgO-doped lithium niobate crystals

et al. 2013

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“…The absorption starts at 390 nm in the range of 10 −2 cm −1 and drops with increasing wavelength for both polarizations. This absorption in the visible spectral range can be referred to Fe 2+ impurities in the crystal [15]. Such impurities originate usually from impurities in the crucibles that are used for the growing process.…”

Section: Absorption Spectra: Comparison and Discussionmentioning

confidence: 99%

Comparative study on three highly sensitive absorption measurement techniques characterizing lithium niobate over its entire transparent spectral range

Leidinger¹,

Fieberg²,

Waasem³

et al. 2015

Opt. Express

121

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We employ three highly sensitive spectrometers: a photoacoustic spectrometer, a photothermal common-path interferometer and a whispering-gallery-resonator-based absorption spectrometer, for a comparative study of measuring the absorption coefficient of nominally transparent undoped, congruently grown lithium niobate for ordinarily and extraordinarily polarized light in the wavelength range from 390 to 3800 nm. The absorption coefficient ranges from below 10(-4) cm(-1) up to 2 cm(-1). Furthermore, we measure the absorption at the Urbach tail as well as the multiphonon edge of the material by a standard grating spectrometer and a Fourier-transform infrared spectrometer, providing for the first time an absorption spectrum of the whole transparency window of lithium niobate. The absorption coefficients obtained by the three highly sensitive and independent methods show good agreement.

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“…This absorption can be attributed to Fe 2+ impurities. 11 For larger wavelengths the absorption drops to a minimum of 10 −3 cm −1 for ordinary polarization and to 2 × 10 −4 cm −1 for extraordinary light polarization around 1700 nm. For ordinary polarization a broad absorption band between 900 and 1500 nm and a sharp absorption peak at 1472 nm are observed.…”

Section: Calibrationmentioning

confidence: 98%

High-sensitivity photoacoustic absorption spectroscopy of nonlinear optical materials

2013

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Nonlinear optical materials are important to extend the spectral coverage of existing lasers, mainly via frequency doubling and with optical parametric oscillators. The quality of the materials and components, e.g. in terms of residual absorption, is pivotal for the performance of the devices. The paper presents high-sensitivity absorption measurements of nonlinear optical materials. They were performed using a photoacoustic spectrometer which combines high sensitivity with broad spectral coverage. This allows one not only to quantify the level of residual absorption but also to assist in the characterization of the materials in terms of optically relevant impurities and imperfections. The spectrometer covers the wavelength range between 407 and 2600 nm using a pulsed optical parametric os cillator as excitation source. Pulse energies up to 100 mJ allow one to record absorption spectra with a sensitivity down to 10 ppm/cm. The paper presents spectra of lithium niobate and lithium triborate crystals which are important for highpower nonlinear optical applications. The results are discussed with respect to material impurities and the suitability of individual samples for frequency conversion

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Properties of the ions of the iron transition group in the lattice of single-crystalline lithium niobate

Cited by 31 publications

References 1 publication

Green-induced blue absorption in MgO-doped lithium niobate crystals

Green-induced blue absorption in MgO-doped lithium niobate crystals

Comparative study on three highly sensitive absorption measurement techniques characterizing lithium niobate over its entire transparent spectral range

High-sensitivity photoacoustic absorption spectroscopy of nonlinear optical materials

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