Low-loss athermal silica-based lattice-form interleave filter with silicone-filled grooves

Author

Kamei, Shin ; Oguma, Manabu ; Kohtoku, Masaki ; Shibata, Tomohiro ; Inoue, Yasuyuki

Author_Institution

NTT Photonics Labs., NTT Corp., Kanagawa, Japan

Volume

17

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

798

Lastpage

800

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.

Keywords

lattice filters; optical delay lines; optical design techniques; optical fibre communication; optical losses; optical waveguide filters; silicones; wavelength division multiplexing; 0.4 dB; SiO₂; WDM; athermal silica; groove excess loss; interleave filter; lattice-form filter; low-loss design; low-loss filter; multiple delay lines; optical characteristics; optical fiber communication; optical waveguide filter; silicone-filled grooves; temperature insensitivity; Arrayed waveguide gratings; Delay lines; Optical devices; Optical fiber filters; Optical filters; Optical losses; Optical planar waveguides; Optical waveguides; Passband; Wavelength division multiplexing; Lattice filters; optical components; optical fiber communication; optical planar waveguides; optical waveguide filters; wavelength-division multiplexing (WDM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2005.843956

Filename

1411880