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Proceedings Paper

Passive and active optical waveguides in LiF thin films
Author(s): Giancarlo C. Righini; Stefano Pelli; Rosa Maria Montereali; Stefano Martelli; Antonella Mancini; Lucilla Fornarini; Giuseppe Baldacchini
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Paper Abstract

Lithium fluoride thin films represent an innovative material for integrated optics. Passive waveguides may be produced by using a LiF/NaF two-layer structure deposited on any substrate material. On the other hand, low-energy electron beam irradiation of LiF polycrystalline films gives rise to the efficient formation of laser active lattice defects showing intense photoluminescence and sizable optical gain in the visible spectral range from green to red at room temperature. This irradiation at the same rime induces an increase of the real part of the refractive index, thus allowing one to exploit electron lithography technique to directly write integrated optical amplifiers and lasers in LiF films. Experimental results of the characterization of both passive and active waveguides are reported, demonstrating the feasibility of more complex circuits in this material.

Paper Details

Date Published: 12 January 1998
PDF: 7 pages
Proc. SPIE 3278, Integrated Optic Devices II, (12 January 1998); doi: 10.1117/12.298192
Show Author Affiliations
Giancarlo C. Righini, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Stefano Pelli, Istituto di Recerca sulle Onde Elettromagnetiche/CNR (Italy)
Rosa Maria Montereali, ENEA Frascati (Italy)
Stefano Martelli, ENEA Frascati (Italy)
Antonella Mancini, ENEA Frascati (Italy)
Lucilla Fornarini, ENEA Frascati (Italy)
Giuseppe Baldacchini, ENEA Frascati (Italy)


Published in SPIE Proceedings Vol. 3278:
Integrated Optic Devices II
Giancarlo C. Righini; S. Iraj Najafi; Bahram Jalali, Editor(s)

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