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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 11 — Jun. 1, 2012
  • pp: 2028–2030

466 mW green light generation using annealed proton-exchanged periodically poled MgO:LiNbO3 ridge waveguides

Jian Sun and Chanqing Xu  »View Author Affiliations


Optics Letters, Vol. 37, Issue 11, pp. 2028-2030 (2012)
http://dx.doi.org/10.1364/OL.37.002028


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Abstract

We report high-power efficient green light generation by frequency doubling from a periodically poled MgO doped LiNbO3 ridge waveguide. The ridge waveguide is fabricated by the annealed proton-exchanging and precise diamond blade dicing techniques. The ridge structure exhibits a surface roughness of only 3.7 nm, and near-90° vertical sidewall. The total insertion loss of an 8.5 µm wide and 1.4 cm long uncoated waveguide is 3.0 dB under direct fiber coupling. 466 mW of continuous-wave green light with an optical-to-optical conversion efficiency of 69.7% is obtained. To the best of our knowledge, this is the highest green light output power reached to date using a ridge-type LiNbO3 waveguide device. Phase-matching temperature shift, tuning curve distortion, and waveguide loss increase are observed under high power operation. Our analysis shows that the photorefractive effect and the green induced infrared absorption are responsible for the observed phenomena, which becomes prominent under several megawatt per square centimeter power density.

© 2012 Optical Society of America

OCIS Codes
(140.7300) Lasers and laser optics : Visible lasers
(160.3730) Materials : Lithium niobate
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(230.7370) Optical devices : Waveguides
(230.7405) Optical devices : Wavelength conversion devices

ToC Category:
Optical Devices

History
Original Manuscript: March 1, 2012
Manuscript Accepted: March 28, 2012
Published: May 30, 2012

Citation
Jian Sun and Chanqing Xu, "466 mW green light generation using annealed proton-exchanged periodically poled MgO:  LiNbO3 ridge waveguides," Opt. Lett. 37, 2028-2030 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-11-2028

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