Second and third harmonic generation by cascading in a QPM LiNbO3 waveguide

Roberta Ramponi; Roberto Osellame; Marco Marangoni; Vera Russo; Emilia Giorgetti; Xianfeng Chen; Alessandro Carta; Francesca Gelli; Stefano Sottini

doi:10.1117/12.379950

24 March 2000 Second and third harmonic generation by cascading in a QPM LiNbO₃ waveguide

Roberta Ramponi, Roberto Osellame, Marco Marangoni, Vera Russo, Emilia Giorgetti, Xianfeng Chen, Alessandro Carta, Francesca Gelli, Stefano Sottini

Author Affiliations +

Proceedings Volume 3936, Integrated Optics Devices IV; (2000) https://doi.org/10.1117/12.379950
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

Quasi-phase-matched (QPM) LiNbO₃ waveguides are at present the most efficient device for second-harmonic- generation (SHG). They require the periodic inversion of the ferroelectric domains and the fabrication of annealed- proton-exchanged (APE) waveguides. In order to work at a wavelength of interest for telecommunications, 1300nm, we realized an APE waveguide, single-mode at such wavelength, on a periodically-poled substrate with a period of 11.7 micrometers . Domain inversion was obtained by Ti-indiffusion. The sample was linearly characterized. For the nonlinear experiment, a tunable Nd:YAG-pumped OPA was used as the light source. The maximum efficiency for SHG was found around 1300nm, within a few nanometers from the expected wavelength. The ratio among the output power of the second harmonic and of the fundamental guided mode was 56 percent. Together with the SH, the third harmonic was generated as the result of a (chi) ² cascading process. On the basis of the result obtained, the problems connected with the design and fabrication of QPM devices will be discussed, with particular attention to the tolerance sin waveguide fabrication. It is worth noting that the two wavelengths were generated simultaneously, using a single laser source. This opens the possibility of generating multicolor output in diode-pumped QPM-waveguides.

Citation Download Citation

Roberta Ramponi, Roberto Osellame, Marco Marangoni, Vera Russo, Emilia Giorgetti, Xianfeng Chen, Alessandro Carta, Francesca Gelli, and Stefano Sottini "Second and third harmonic generation by cascading in a QPM LiNbO₃ waveguide", Proc. SPIE 3936, Integrated Optics Devices IV, (24 March 2000); https://doi.org/10.1117/12.379950

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