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A Miniaturized Tunable Filter Based on a Fiber Bragg Grating Loaded by a Ceramic-Tube Microheater |
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| Authors: | Yoshiaki Tachikawa Sinji Nagaoka Yoshio Suzuki |
| Institution: | (1) NTT Opto-electronics Laboratories, 9-11, Midori-cho 3-chome, Musashino, Tokyo 180, Japan |
| Abstract: | A miniaturized 1.55 μm tunable fiber Bragg grating (FGB) filter is proposed and successfully demonstrated using an aluminum ceramic-tube with a tungsten thick film sleeve microheater. Fine tuning of the Bragg reflective wavelength with 0.0135 nm/oC is achieved by adding the constant thermal distribution along the uniform FBG with a 0.3 nm bandwidth. Furthermore, a 1.5 nm linearly chirped reflection bandwidth is obtained by thermal gradient loading. |
| Keywords: | fiber Bragg grating tunable filter microheater thermal loading thermal gradient thermo-optic effect tunable chirping dispersion equalizing wavelength division multiplexing |
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