Coupling of lithium niobate disk resonators to integrated waveguides

S. Berneschi; F. Cosi; G. Nunzi Conti; S. Pelli; S. Soria; G. C. Righini; M. Dispenza; A. Secchi

doi:10.1117/12.876378

8 February 2011 Coupling of lithium niobate disk resonators to integrated waveguides

S. Berneschi, F. Cosi, G. Nunzi Conti, S. Pelli, S. Soria, G. C. Righini, M. Dispenza, A. Secchi

Proceedings Volume 7941, Integrated Optics: Devices, Materials, and Technologies XV; 79410U (2011) https://doi.org/10.1117/12.876378
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

Whispering gallery mode (WGM) disk resonators fabricated in single crystals can have high Q factors within their transparency bandwidth and may have application both in fundamental and applied optics. Lithium niobate (LN) resonators thanks to their electro-optical properties may be used in particular as tunable filters, modulators, and delay lines. A critical step toward the actual application of these devices is the implementation of a robust and efficient coupling system. High index prisms are typically used for this purpose. In this work we demonstrate coupling to high-Q WGM LN disks from an integrated optical LN waveguide. The waveguides are made by proton exchange in X-cut LN. The disks with diameters of about 5 mm and thickness of 1 mm are made from commercial Z-cut LN wafers by core drilling a cylinder and thereafter polishing the edges into a spheroidal profile. Both resonance linewidth and cavity photon lifetime measurements were performed to calculate the Q factor of the resonator, which is in excess of 10⁸.

Citation Download Citation

S. Berneschi, F. Cosi, G. Nunzi Conti, S. Pelli, S. Soria, G. C. Righini, M. Dispenza, and A. Secchi "Coupling of lithium niobate disk resonators to integrated waveguides", Proc. SPIE 7941, Integrated Optics: Devices, Materials, and Technologies XV, 79410U (8 February 2011); https://doi.org/10.1117/12.876378

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