| Autor: |
Rigrod, W. W., McFee, J. H., Pollack, M. A., Logan, R. A. |
| Zdroj: |
Journal of the Optical Society of America (1917-1983); January 1975, Vol. 65 Issue: 1 p46-55, 10p |
| Abstrakt: |
Heterostructure GaAs–Al_xGa_1−xAs–GaAs waveguides for 10.6 μm wavelength grown by liquid-phase epitaxy have a linear variation of dielectric constant in their substrates. On the basis of their mode equation, a computer program was devised for obtaining optimum values of the six parameters that define the index profiles, given a sufficient number and distribution of mode-angle measurements. The optimized parameters agreed well with the measured values for a variety of waveguides, illustrating the generality of the parameter-optimization procedure. Two types of leaky modes were observed, whose effective index β/k is less than the seed index, (1) Lummer–Gehrcke modes that are incompletely reflected at the substrate–seed interface and (2) low-loss totally reflected modes whose evanescent fields radiate into high-index seeds. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
