Refracting Boundaries In Thin Film Glass Lightguides

A. F. Turner; S. D. Browning

doi:10.1117/12.958146

27 February 1980 Refracting Boundaries In Thin Film Glass Lightguides

A. F. Turner, S. D. Browning

Proceedings Volume 0204, Physical Properties of Optical Materials; (1980) https://doi.org/10.1117/12.958146
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

Alumina and lanthana glasses in ternary systems containing BaO and SiO2 are useful for the vacuum deposition of thin film lightguides.1 Evaporated with an electron gun they produce low-loss films of refractive index 1.64-1.66. These can serve as the interconnecting lightguide for components of an integrated optics system. Understanding the refraction process at the boundaries of refracting components is vital. This paper describes experimental studies of refraction at a straightline boundary between evaporated glass lightguides and evaporated thin film overlays of Sb203 with index 2.10. In the guide the angle of incidence on the boundary was 60°. Refraction was measured versus overlay thickness. As an example, for lowest order modes, a lightguide optically 2.4 quarterwaves thick with a 1.8 quarterwave overlay refracts a HeNe beam 7° in TM polarization and 11° in TE. The overlay edge was tapered a width of 1 mm. The refraction process is a continuous direction change through the taper. Snell's law gives the total change if mode indices on each side of the boundary are used. The work was supported by the Air Force Office of Scientific Research (AFSC), The United States Air Force, and the Army Research Office, United States Army.

Citation Download Citation

A. F. Turner and S. D. Browning "Refracting Boundaries In Thin Film Glass Lightguides", Proc. SPIE 0204, Physical Properties of Optical Materials, (27 February 1980); https://doi.org/10.1117/12.958146

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available