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Tunable midinfrared source by difference frequency generation in bulk periodically poled KTiOPO4

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4 Author(s)
Fradkin, K. ; Department of Electrical Engineering—Physical Electronics, Faculty of Engineering, Tel Aviv University, 69978 Tel Aviv, Israel ; Arie, A. ; Skliar, A. ; Rosenman, G.

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We demonstrate quasi-phase-matched difference frequency generation in periodically poled KTiOPO4. A midinfrared (3.2–3.4 μm) idler with a power level of 0.17 μW is generated by mixing a Nd:YAG laser and tunable external cavity laser near 1550 nm which is amplified by an erbium-doped fiber amplifier. The wavelength, temperature, and angle tuning characteristics of this device are determined. The experimental results are used to derive a Sellmeier equation with improved accuracy in the midinfrared range for the extraordinary refractive index of flux-grown KTiOPO4. © 1999 American Institute of Physics.

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Applied Physics Letters  (Volume:74 ,  Issue: 7 )