Narrowband, tunable, 2 µm optical parametric master-oscillator power amplifier with large-aperture periodically poled Rb:KTP

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Raman Scattering and Nd3+ Laser Operation in NaLa(WO4)2

The continuous-wave laser operation of Nd-doped tetragonal NaLa(WO4)2 crystal is studied at room temperature by optical pumping in the spectral region overlapping AlGaAs diode laser emission. This crystal has inhomogeneously broadened optical bands. From the room-temperature spectroscopic parameters determined it is found that the optimum Nd concentration for the 4F3/2 --> 4IJ laser channels must be in the 3-5 at.% range. For J=11/2 and 13/2 channels (lambda approximate to 1.06 and 1.3 mum) the most favourable polarization configuration is parallel to the crystallographic c axis, while for J=9/2 little polarization dependence of the laser efficiency is predicted. Laser operation was achieved with a 3.35 at.% Nd-doped sample grown by the Czochralski method. The laser operation was tested in an hemispherical optical cavity pumped by a Ti:sapphire laser. Stimulated emission at lambda=1056 nm was achieved for a wide spectral pumping range, lambda=790-820 nm. Stimulated Raman scattering was achieved in the picosecond regime with an efficiency similar to that of monoclinic KY(WO4)2 reference compoundThis work was supported in part by the Projects DT-CRYS or NMP3-CT-2003-505580 (EU), in part by MAT2004-21113-E, MAT2005-06354-C03-01 (Spanish Science and Education Ministry), and in part by RFBR 06-02-16747 (Russia). The work of M. Rico was supported by the Ramón y Cajal program of the Spanish Science and Education Ministry. The work of A. García-Cortés is supported by the FPU program of the Spanish Science and Education MinistryPeer reviewe

Bulk PPKTP by crystal growth from high temperature solution

: A2. Growth from high temperature solutions A3. Liquid phase epitaxy B2. Ferroelectric materials B2. Nonlinear optic materials a b s t r a c t Periodically-poled ferroelectric crystals show unprecedented efficiency and properties otherwise impossible to obtain. Unfortunately, the sample thickness obtainable today limits their use to low and moderate power application. With the aim of increasing the size of periodically domain-structured crystals with a controlled and regular grating period, we proposed an epitaxial growth process using seeds made of thin plates domain engineered by electric field poling. We demonstrated this process with the ferroelectric crystal KTiOPO 4 (KTP) which is one of the most promising candidate materials for that purpose. The poling step requires a sample exhibitin

Non-critical OPO based on periodically-poled KTP crystal generating ∼ 250 ps idler pulses at 1 - 10 kHz

Idler pulses at 2.8 µm with energy of ∼ 50 µJ and ∼ 250 ps pulse duration are obtained from a short-cavity, singly-resonant OPO based on PPKTP, pumped by a 1−10 kHz, 500 ps, 1064 nm laser source