Characterization of erbium doped lithium niobate crystals and waveguides
نویسندگان
چکیده
Optical planar waveguides have been fabricated by the titanium in-diffusion process in lithium niobate crystals activated with erbium ions. The waveguides were studied by m-line technique in order to recover the index profile. The effect of the Ti in-diffusion on the structural and spectroscopic properties of the lithium niobate crystals was investigated by Raman and photoluminescence spectroscopies. The presence of titanium has only minor effects on the vibrational properties of the crystal, and no change in the emission properties of the erbium ions is observed. 2006 Elsevier B.V. All rights reserved. PACS: 42.82.Et; 78.66.Nk; 78.55.Hx
منابع مشابه
Optimized Digital Optical Switch Using Proton Exchanged Lithium Niobate Waveguides
The main emphasis in developing DOS has been on achieving low crosstalk (CT). CT in the order of -30 dB is acceptable in conventional DOS and below that value is hard to achieve. Relatively low drive voltage (or power requirements) is also necessary to optimized DOS. This paper depicts the design of Y-branched digital optical switches (DOS) with optimized on-chip area coverage, reduced driving ...
متن کاملRole of cerium in lithium niobate for holographic recording
Cerium-doped lithium niobate crystals are tested for holographic recording. A photochromic effect is observed in crystals doped with cerium and manganese. But two-center recording in the sample is not as effective as in iron and manganese doubly doped crystals. Photocurrent measurements in cerium and iron singly doped crystals indicate that the photovoltaic constant in the cerium-doped crystal ...
متن کاملFabrication of p-type lithium niobate crystals by molybdenum doping and polarization
The lack of p-type lithium niobate limits it serving as an active material. A series of Mo-doped and pure congruent lithium niobate crystals were grown by Czochralski method under different polarization conditions. Their dominant carrier species were characterized by holographic experiment. The results showed dominant charge carrier species may be changed from electrons to holes when lithium ni...
متن کاملRecent achievements in LiNbO3 waveguides fabricated by swift heavy ion irradiation
Optical waveguides having some unique characteritics can be fabricated in Lithium niobate using high energy heavy ions. High optical confinement or very thick optical waveguides can be obtained using moderate (10 cm) or even ultralow (10 cm) fluences. The method has also been applied to other crystals of photonic interest. We present a review of the recent achievements obtained. Lithium niobate...
متن کاملChemical bond analysis of the second-order nonlinear optical behaviour of Mg-doped lithium niobate
Second-order nonlinear optical properties of Mg-doped lithium niobate single crystals are quantitatively studied from the chemical bond viewpoint. The results show that the secondorder nonlinear optical response of Mg-doped LiNbO3 single crystals at 1079 nm decreases linearly with increasing Mg concentration in the crystal. This linear correlation is quantitatively evaluated in the current work.
متن کامل