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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 1 — Jan. 1, 2004
  • pp: 95–97

Quasi-phase-matched generation of tunable blue light in a quasi-periodic structure

Ping Xu, Kun Li, Gang Zhao, Shi-ning Zhu, Yan Du, Shuai-hua Ji, Yong-yuan Zhu, Nai-ben Ming, L. Luo, K. F. Li, and K. W. Cheah  »View Author Affiliations


Optics Letters, Vol. 29, Issue 1, pp. 95-97 (2004)
http://dx.doi.org/10.1364/OL.29.000095


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Abstract

We present what is to our knowledge a new approach to generating tunable blue light by cascaded nonlinear frequency conversion in a single LiTaO3 crystal. Simultaneous quasi-phase matching of an optical parametric generation process and a sum-frequency mixing process is achieved by means of structuring the crystal with a quasi-periodic optical superlattice. The spectral (wavelength tuning and bandwidth) and power characteristics of the blue-light generation are studied with a fixed-wavelength 532-nm picosecond laser and a wavelength-tunable nanosecond optical parametric oscillator (OPO) as the pump sources. By tuning the OPO wavelength, we could tune the blue output over ∼20 nm . Temperature tuning of the blue output at a fixed pump wavelength of 532 nm was limited to ∼1.5 nm. A maximum blue power of 15 μW was generated at a pump power of 0.5 mW, corresponding to an efficiency of 3%.

© 2004 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(230.4320) Optical devices : Nonlinear optical devices

Citation
Ping Xu, Kun Li, Gang Zhao, Shi-ning Zhu, Yan Du, Shuai-hua Ji, Yong-yuan Zhu, Nai-ben Ming, L. Luo, K. F. Li, and K. W. Cheah, "Quasi-phase-matched generation of tunable blue light in a quasi-periodic structure," Opt. Lett. 29, 95-97 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-1-95

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