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Optics Letters

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  • Vol. 30, Iss. 7 — Apr. 1, 2005
  • pp: 723–725

Low-loss waveguides written with a femtosecond laser for flexible interconnection in a planar light-wave circuit

Yusuke Nasu, Masaki Kohtoku, and Yoshinori Hibino  »View Author Affiliations


Optics Letters, Vol. 30, Issue 7, pp. 723-725 (2005)
http://dx.doi.org/10.1364/OL.30.000723


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Abstract

We describe a low-loss single-mode waveguide in planar light-wave circuit (PLC) glass doped with boron and phosphorus, which is more difficult to write than pure-silica glass. The written waveguide has a rectangular core, a symmetric near-field pattern, and a propagation loss of 0.35 dB∕cm. The loss that originates from the mode-field mismatch between the mode-field diameters of the written and the PLC waveguides is less than 0.1 dB∕point. In addition, we successfully connected PLC waveguides with a 500-µm-long waveguide written with a laser. The laser-written waveguide can flexibly connect PLC waveguides with a low coupling loss.

© 2005 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(230.7370) Optical devices : Waveguides
(320.2250) Ultrafast optics : Femtosecond phenomena

Citation
Yusuke Nasu, Masaki Kohtoku, and Yoshinori Hibino, "Low-loss waveguides written with a femtosecond laser for flexible interconnection in a planar light-wave circuit," Opt. Lett. 30, 723-725 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-7-723


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