Lithium niobate electrically controlled super-Gaussian mirrors

Antonello Cutolo; Luigi Zeni

doi:10.1117/12.174989

2 May 1994 Lithium niobate electrically controlled super-Gaussian mirrors

Antonello Cutolo, Luigi Zeni

Proceedings Volume 2150, Design, Simulation, and Fabrication of Optoelectronic Devices and Circuits; (1994) https://doi.org/10.1117/12.174989
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Lithium Niobate is a material almost transparent in the visible and in the near IR range with a fairly high thermo-optical coefficient (5.3 X 10^-5 degree(s)C^-1). Relaying on the above properties, we have designed dielectric multistrate mirrors with supergaussian reflectivity profile whose parameters can be easily varied through the control of the border temperature. In fact, if one of the dielectric layers (active layer) is made up by a thermo-optical material, keeping the border temperature of the mirror above the environmental one, a temperature gradient is created along the radius. This gradient induces a refractive index modulation in the active layer which, in turn, give rise to a tapering of the reflection coefficient. This tapering fits very well a supergaussian profile.

Citation Download Citation

Antonello Cutolo and Luigi Zeni "Lithium niobate electrically controlled super-Gaussian mirrors", Proc. SPIE 2150, Design, Simulation, and Fabrication of Optoelectronic Devices and Circuits, (2 May 1994); https://doi.org/10.1117/12.174989

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