Low-loss athermal silica-based lattice-form interleave filter with silicone-filled grooves |
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Authors: | S. Kamei M. Oguma M. Kohtoku T. Shibata Y. Inoue |
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Affiliation: | NTT Photonics Labs., NTT Corp., Kanagawa, Japan; |
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Abstract: | We describe a low-loss athermal silica-based interleave filter with a lattice-form structure. We athermalize the filter by using a silicone-filled groove formed in each delay line and we employ a low-loss design to reduce the accumulated groove excess loss in the multiple delay lines. By using these designs, we obtained a very low groove excess loss of 0.4 dB and achieved satisfactory temperature insensitivity and optical characteristics with this filter. |
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