Modeling, characterization, and experimental/numerical comparison of signal and fluorescence amplification in Ti :Er :LiNbO3 waveguides

• Published in: IEEE journal of quantum electronics Vol. 37; no. 11; pp. 1460 - 1468
• Main Authors: LAZARO, J. A, REBOLLEDO, M. A, VALLES, J. A
• Format: Journal Article
• Language: English
• Published: New York, NY Institute of Electrical and Electronics Engineers 01-11-2001; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Integrated optics. Optical fibers and wave guides; Optical and optoelectronic circuits; Optical waveguides and couplers; Waveguides, couplers, and arrays; Ternary compound; Integrated optics; Lithium niobate; Optimization method; Theoretical study; Fluorescence; Doped materials; Titanium addition; Experimental study; Inorganic compound; Amplified spontaneous emission; Erbium addition; Optical amplifier; Numerical simulation; Optical waveguide; Codoping; Gain
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.958377

A complete model for signal and fluorescence amplification in Ti:Er:LiNbO3 waveguides under 1480 and 980 nm excitation, which includes transitions involving high energy levels, is presented. Most of the waveguide parameters that the model requires have been determined or checked in situ. In order to numerically solve the proposed model, the overlapping factors method has been adapted to these waveguides and improved, obtaining a large computing time reduction with sufficiently accurate results. Finally, results from signal gain and ASE spectral measurements and numerical simulations have been compared. The remarkable agreement confirms both the model assumptions and the used characterization techniques. Moreover, the unusually short computing time which is consumed makes the model suitable for design and optimization processes. (Author)