Terahertz-wave parametric generation characteristics of MgO:LiNbO3

This paper describes the terahertz‐wave generation characteristics and mechanism of a terahertz‐wave parametric oscillator (TPO) using MgO:LiNbO3, which has high optical damage resistance. We have observed that congruent MgO:LiNbO3 shows fivefold higher THz‐wave output characteristics compared to un...

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Bibliographic Details
Published in:Electronics & communications in Japan. Part 2, Electronics Electronics, 2002-04, Vol.85 (4), p.22-29
Main Authors: Ken-ichi, Karino, Jun-ichi, Shikata, Kodo, Kawase, Hiromasa, Ito, Ietaka, Sahashi
Format: Article
Language:English
Subjects:
device design
doping level dependence
MgO:LiNbO3
parametric
THz-wave
wide tunability
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Summary:This paper describes the terahertz‐wave generation characteristics and mechanism of a terahertz‐wave parametric oscillator (TPO) using MgO:LiNbO3, which has high optical damage resistance. We have observed that congruent MgO:LiNbO3 shows fivefold higher THz‐wave output characteristics compared to undoped LiNbO3. To find the optimum concentration of MgO and to study the mechanism of output increase, we measured the THz‐wave parametric generation (TPG) and far‐infrared spectral characteristics of MgO:LiNbO3 samples having different doping concentration. We found that the optimum concentration is 5 mol% and that output is increased due to an increase in parametric gain resulting from the increased Raman scattering cross section and increased lifetime of the lowest A1‐symmetry phonon mode. © 2002 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 85(4): 22–29, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.1101
ISSN:8756-663X
1520-6432
DOI:10.1002/ecjb.1101