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Transverse Writing of Multimode Interference Waveguides inside Silica Glass by Femtosecond Laser Pulses |
| LIU Da-Yong, LI Yan, DOU Yan-Ping, GUO Heng-Chang, YANG Hong, GONG Qi-Huang |
| State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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LIU Da-Yong, LI Yan, DOU Yan-Ping et al 2008 Chin. Phys. Lett. 25 2500-2503 |
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Abstract Multi-mode interference waveguides are fabricated inside silica glass by transverse writing geometry with femtosecond laser pulses. The influences of several writing and reading factors on the output mode are systematically studied. The experimental results of straight waveguides are in good agreement with the simulations by the beam propagation method. By integrating a straight waveguide with a bent waveguide, a 1×2 multi-mode splitter is formed and 2×3 lobes are observed in the output mode.
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| Keywords:
42.65.-b
42.82.Et
81.05.Kf
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Received: 26 February 2008
Published: 26 June 2008
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