Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 84, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4792724
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- Deutsche Forschungsgemeinschaft
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A sensitive photoacoustic absorption spectrometer for highly transparent solids has been built and tested. As the light source an optical parametrical oscillator pumped by a nanosecond pulse laser with 10 Hz repetition rate is employed, covering the complete wavelength range from 407 to 2600 nm. A second-harmonic-generation unit extends the range of accessible wavelengths down to 212 nm. A lead-zirconate-titanate piezo transducer, directly coupled to the sample, detects the photoacoustically generated sound waves. Absorption spectra of lithium triborate, lithium niobate, and alpha barium borate crystals with absorption coefficients down to 10(-5) cm(-1) are presented. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4792724]
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