| Session | ||
TOM6 S03: Optical Materials: Optical materials, probing and characteriozation
| ||
| Presentations | ||
16:15 - 17:00
Special Invited ID: 541 / TOM6 S03: 1 TOM 6 Optical Materials: crystals, thin films, organic molecules and polymers, syntheses, characterization and devices Oxide-based nonlinear borate single crystals: a good challenge for the design of efficient UV solid state laser in the UV range Chimie Paristech, France Nowadays, only very few nonlinear (NLO) crystals can achieve Third harmonic or forth harmonic generation phase matching process towards UV, especially when wavelengths below 270 nm are targeted. Therefore, the field of research for NLO materials in UV range is still widely open. Reliable and long lifetime new NLO crystals would easily open industrial markets. More than hundreds of non-centrosymmetric crystals have been investigated since 1962 regarding their frequency conversion properties. However, the most materials that eventually came to the market and found practical applications remain oxide-based borates single crystals 17:00 - 17:15
ID: 236 / TOM6 S03: 2 TOM 6 Optical Materials: crystals, thin films, organic molecules and polymers, syntheses, characterization and devices Optical characterization of diffusion doped Nd:LNOI 1Helmut Schmidt University, Germany; 2Shandong University, P.R. China Nd doped LNOI has been fabricated from a diffusion doped LiNbO3 (LN) substrate. Diffusion doping allows to fabricate differently doped areas on a single LNOI substrate. The fluorescence spectra, the fluorescence lifetime and the small signal gain have been determined for the first time, to the best of our knowledge. The results obtained agree with data published for diffusion doped ridge or channel waveguides in LN substrates. We achieve a small signal gain of 16dB pumping with a DBR laser diode what is promising for future laser operation. 17:15 - 17:30
ID: 409 / TOM6 S03: 3 TOM 6 Optical Materials: crystals, thin films, organic molecules and polymers, syntheses, characterization and devices Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography 1Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Faculty of Medicine Carl Gustav Carus, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany; 2Institute of Applied Physics, TU Dresden, Noethnitzerstr. 61, 01187 Dresden, Germany; 3ct.qmat, Dresden-Würzburg Cluster of Excellence-EXC 2147, TU Dresden, Noethnitzerstr. 61, 01187 Dresden, Germany Domain walls (DWs) in ferroelectric materials are of highest interest as integrated functional elements, for instance in optoelectronic nanodevices. We investigate individual ferroelectric DWs in periodically-poled LiNbO3 single crystals by applying polarization-sensitive optical coherence tomography at 1300 nm. Using circular light polarization, we probe the relevant electro-optical properties close to and at the DWs. Comparing experimental results to simulations, we conclude that the three different DW signals are associated to the ordinary and extraordinary refractive index, and to a third contribution from the mean value of both. | ||