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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 24 — Nov. 21, 2011
  • pp: 23958–23964

Low-loss channel optical waveguide fabrication in Nd3+-doped silicate glasses by femtosecond laser direct writing

Shi-Ling Li, Peigao Han, Meng Shi, Yicun Yao, Bing Hu, Mingwei Wang, and Xiaonong Zhu  »View Author Affiliations

Optics Express, Vol. 19, Issue 24, pp. 23958-23964 (2011)

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Optical waveguides were fabricated in neodymium-doped silicate glass by using a low-repetition-rate (1 kHz) femtosecond laser inscription. Two different types of waveguide structure are fabricated. In the first, guiding occurs in the focal spot. In the second, guiding occurs in the region between the two filaments. The near-field intensity distribution, propagation loss, index profile reconstruction, and calculation of the modal intensity distribution by the beam propagation method of these waveguides are presented. On the basis of near-field intensity distribution of the light guided through the waveguides and the propagation loss measurement, the optimum writing conditions such as the pulse energy and scan velocity were determined. The waveguide written with 2.2 µJ pulse energy and 50 µm/s scan velocity shows strong guidance at 632.8 nm, with an index contrast of 7 × 10−4 and a propagation loss of ~0.8 dB/cm.

© 2011 OSA

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.3380) Materials : Laser materials
(230.7380) Optical devices : Waveguides, channeled

ToC Category:
Laser Microfabrication

Original Manuscript: August 8, 2011
Revised Manuscript: October 10, 2011
Manuscript Accepted: October 13, 2011
Published: November 10, 2011

Shi-Ling Li, Peigao Han, Meng Shi, Yicun Yao, Bing Hu, Mingwei Wang, and Xiaonong Zhu, "Low-loss channel optical waveguide fabrication in Nd3+-doped silicate glasses by femtosecond laser direct writing," Opt. Express 19, 23958-23964 (2011)

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