Title :
Theoretical modeling of optical amplification in Er-doped Ti:LiNbO 3 waveguides
Author :
Dinand, Manfred ; Sohler, Wolfgang
Author_Institution :
Angewandte Phys., Univ. Gesamthochschule Paderborn, Germany
fDate :
5/1/1994 12:00:00 AM
Abstract :
An accurate theoretical analysis is presented describing optical amplification in Er-diffused Ti:LiNbO3 channel waveguides. It follows as far as possible the theory already developed for Er-doped fibers. As optical pumping around λp≈1.48 μm is considered, a quasi-two-level model for the Er3+ ions is used with wavelength-dependent cross sections. The optical gain in the 1.53 μm<λ<1.64-μm wavelength range is evaluated. The characteristic parameters, as Er concentration profile, cross sections, pump, and signal mode distributions and waveguide (scattering) losses are taken from experiments. Examples of numerically calculated pump-, small-signal-gain-, and ASE-evolutions are presented. The model has been tested by comparing computed and experimentally observed gain characteristics for Xˆ- and Yˆ-cut LiNbO3; an almost quantitative agreement has been obtained
Keywords :
erbium; integrated optics; laser theory; lithium compounds; optical pumping; optical waveguide theory; optical waveguides; solid lasers; titanium; 1.48 mum; 1.53 mum; ASE-evolutions; Er concentration profile; Er-diffused Ti:LiNbO3 channel waveguides; Er-doped Ti:LiNbO3 waveguides; LiNbO3:Er,Ti; Yˆ-cut LiNbO3; cross sections; gain characteristics; optical amplification; optical gain; optical pumping; pump mode distributions; quasi-two-level model; signal mode distributions; small-signal-gain; theoretical modeling; waveguide scattering losses; wavelength-dependent cross sections; Erbium; Optical fiber theory; Optical losses; Optical pumping; Optical scattering; Optical waveguide theory; Optical waveguides; Particle beam optics; Scattering parameters; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
