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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 3, Iss. S1 — Aug. 28, 2005
  • pp: S57–S59

Fabrication of Dammann gratings in silica glass

Yudong Li, Wataru Watanabe, Qian Sun, Takayuki Tamaki, Junji Nishii, and Kazuyoshi Itoh  »View Author Affiliations


Chinese Optics Letters, Vol. 3, Issue S1, pp. S57-S59 (2005)


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Abstract

Dammann grating is one kind of binary optical elements. We fabricated Dammann gratings in silica glass using femtosecond laser pulses at the wavelength of 800 nm with the repetition rate of 1 kHz. By using two-dimensional (2D) scanning system, we produced successfully 5*5 Dammann gratings for He-Ne laser with the wavelength of 632.8 nm. We selected suitable writing parameters to keep the length of the refractive index changed region as 160 microns across the grating. It makes the phase shift of the modulated region close to be 'pi'. The diffraction efficiency of the fabricated Dammann grating in our experiment reached to 56%, quite close to the theoretical value of 77%.

© 2005 Chinese Optics Letters

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.2770) Diffraction and gratings : Gratings
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.3990) Optical devices : Micro-optical devices
(230.4000) Optical devices : Microstructure fabrication
(320.0320) Ultrafast optics : Ultrafast optics

Citation
Yudong Li, Wataru Watanabe, Qian Sun, Takayuki Tamaki, Junji Nishii, and Kazuyoshi Itoh, "Fabrication of Dammann gratings in silica glass," Chin. Opt. Lett. 3, S57-S59 (2005)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-3-S1-S57

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