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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 9 — Sep. 1, 2012
  • pp: 1209–1218

Mid-IR volumetric Bragg grating based on LiF color center crystal

Dmitry V. Martyshkin, Anton V. Fedorov, Anitha Arumugam, David J. Hilton, Vladimir V. Fedorov, and Sergey B. Mirov  »View Author Affiliations

Optical Materials Express, Vol. 2, Issue 9, pp. 1209-1218 (2012)

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We have demonstrated volumetric Bragg gratings (VBGs) for mid-IR spectral range based on LiF color center (LiF:CC) crystals. γ-irradiated LiF:CC crystals feature strong absorption bands in the visible and near-IR spectral range, where selective color center photo-bleaching allows for the LiF refractive index modification. The absence of active absorption in LiF:CC crystals at wavelengths longer than 1.3 μm results in a VBG that is stable under mid-IR irradiation. Our calculations predict a ~60% diffraction efficiency over 1-6 μm spectral range, which could be realized in a ~1 cm long VBG. To verify this, we fabricated periodic structures in LiF:CC crystals using an amplified femtosecond Ti:sapphire laser. Diffraction at 1.56 μm is demonstration of a phase grating in LiF and is a proof of the feasibility of LiF:CC crystals for mid-IR VBG applications.

© 2012 OSA

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(160.5320) Materials : Photorefractive materials

ToC Category:
Photorefractive Materials

Original Manuscript: April 16, 2012
Revised Manuscript: July 6, 2012
Manuscript Accepted: July 12, 2012
Published: August 7, 2012

Virtual Issues
Advances in Optical Materials (2012) Optical Materials Express

Dmitry V. Martyshkin, Anton V. Fedorov, Anitha Arumugam, David J. Hilton, Vladimir V. Fedorov, and Sergey B. Mirov, "Mid-IR volumetric Bragg grating based on LiF color center crystal," Opt. Mater. Express 2, 1209-1218 (2012)

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