Variational analysis of Er : Ti : LiNbO3 waveguide lasers based on Gaussian/two-half Gaussian mode field distribution
✍ Scribed by De-Long Zhang; Bo Wu
- Book ID
- 104159666
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 407 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0030-3992
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✦ Synopsis
Starting with two dimensional, scalar wave equation, a variational equation was established for the fundamental TE and TM modes guided in Ti : LiNbO3 waveguides on the basis of assuming a symmetric Gaussian mode ÿeld function in the width direction and two-half Gaussian trial functions in the depth direction. The controllable waveguide fabrication parameters, including channel width, di usion temperature, initial Ti-strip thickness and di usion time, dependent of fundamental mode size, e ective pump area, coupling e ciency between pump and laser modes, and the coupling loss between a Ti : LiNbO3 waveguide and a ÿber were numerically calculated for Z-cut Er : Ti : LiNbO3 channel waveguide lasers at three possible emission wavelengths 1532; 1563 and 1576 nm and two possible pump wavelengths 1480 and 980 nm. The calculated results were compared with those of Gaussian=Hermite-Gaussian mode ÿeld distribution in detail.