Diamond-Machined Geodesic Lenses In LiNbO3

D. Mergerian; E. C. Malarkey; R. P. Pautienus; J. .C. Bradley

doi:10.1117/12.957223

26 July 1979 Diamond-Machined Geodesic Lenses In LiNbO3

D. Mergerian, E. C. Malarkey, R. P. Pautienus, J. .C. Bradley

Proceedings Volume 0176, Guided Wave Optical Systems and Devices II; (1979) https://doi.org/10.1117/12.957223
Event: Technical Symposium East, 1979, Washington, D.C., United States

Abstract

The application of single point diamond turning to the fabrication of aberration-corrected, aspheric geodesic lenses in LiNb03 for use in integrated optics is reported. F/5 lenses with useful apertures of 4 mm and 5 mm have been produced. Lens profile accuracies ranging between 1.5 and 3 pm total indicator reading and depth accuracies of 0.25 to 2.0 μm have been achieved. The machined surfaces require only light polishing, which produces little effect on the figure accuracy, to remove residual machining marks. Waveguides grown by Ti-indiffusion are found to be characterized by very low scattering losses. Optical image spot sizes of 1.35 to 2.23 times diffraction-limited have been measured for input beam widths of 1.0 to 3.28 mm for a lens in which the edge rounding has not been incorporated into the aspheric correction. The edge rounding has been included in the correction for subsequent lenses.

Citation Download Citation

D. Mergerian, E. C. Malarkey, R. P. Pautienus, and J. .C. Bradley "Diamond-Machined Geodesic Lenses In LiNbO3", Proc. SPIE 0176, Guided Wave Optical Systems and Devices II, (26 July 1979); https://doi.org/10.1117/12.957223

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