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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 5 — Mar. 8, 2004
  • pp: 742–746

Fabrication of internal diffraction gratings in calcium fluoride crystals by a focused femtosecond laser

Quan-Zhong Zhao, Jian-Rong Qiu, Xiong-Wei Jiang, Chong-Jun Zhao, and Cong-Shan Zhu  »View Author Affiliations


Optics Express, Vol. 12, Issue 5, pp. 742-746 (2004)
http://dx.doi.org/10.1364/OPEX.12.000742


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Abstract

We report the fabrication of internal diffraction gratings in calcium fluoride crystals by a focused near-IR 800 nm femtosecond laser. The diffraction efficiency and refractive index change were evaluated after femtosecond laser irradiation and subsequent annealing. The maximum refractive index change was estimated to be 3.57×10-4. Optical absorption spectra, measured for the crystals before and after the laser irradiation and subsequent annealing, indicate that the absorbance increase after femtosecond laser irradiation and decrease with increasing annealing temperature. The mechanisms of refractive index change are proposed. The results may be useful for fabrication of three-dimensional integrated optics devices in the crystals.

© 2004 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.4670) Materials : Optical materials
(270.4180) Quantum optics : Multiphoton processes

ToC Category:
Research Papers

History
Original Manuscript: January 5, 2004
Revised Manuscript: February 18, 2004
Published: March 8, 2004

Citation
Quan-Zhong Zhao, Jian-Rong Qiu, Xiong-Wei Jiang, Chong-Jun Zhao, and Cong-Shan Zhu, "Fabrication of internal diffraction gratings in calcium fluoride crystals by a focused femtosecond laser," Opt. Express 12, 742-746 (2004)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-5-742


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References

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