Share Email Print
cover

Proceedings Paper

Geodesic Lens Performance Characteristics
Author(s): J. C. Bradley; L. D. Hutcheson; A. L. Kellner; E. C. Malarkey; D. Mergerian; R. P. Pautienus
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The position of the focal plane, the intensity profile of the first diffraction spot and power losses have been measured for geodesic lenses in Ti-indiffused LiNb03 waveguides. It was intended for the focal plane of a geodesic lens to be situated at a waveguide edge; experimental results have shown that this was achieved to a tolerance of better than 12 im with two of the measured focal planes coinciding with the waveguide edge to within the +2 Inn accuracy of the measurement techniaue. Scans of the intensity profiles of focused diffraction spots have been made for one and two lens systems; the spot sizes in both cases were found to be <1.15 times the diffraction limit at F/12. Throughput losses in geodesic lenses ranged from 2.5 to 17 dB - the larger losses occurring in lenses with small edge rounding and large corrected regions. An analytical program was initiated to determine the various mechanisms responsible for power loss. A simplified model indicates that a significant loss is due to mode mismatch in the vicinity of the edge rounding.

Paper Details

Date Published: 25 February 1981
PDF: 8 pages
Proc. SPIE 0239, Guided Wave Optical and Surface Acoustic Wave Devices: Systems and Applications, (25 February 1981); doi: 10.1117/12.959191
Show Author Affiliations
J. C. Bradley, Westinghouse Systems Development Division (United States)
L. D. Hutcheson, Westinghouse Systems Development Division (United States)
A. L. Kellner, Westinghouse Systems Development Division (United States)
E. C. Malarkey, Westinghouse Systems Development Division (United States)
D. Mergerian, Westinghouse Systems Development Division (United States)
R. P. Pautienus, Westinghouse Systems Development Division (United States)


Published in SPIE Proceedings Vol. 0239:
Guided Wave Optical and Surface Acoustic Wave Devices: Systems and Applications
Chen S. Tsai, Editor(s)

© SPIE. Terms of Use
Back to Top