Wavelength tunable optical add-after-drop filter with flat passband for WDM networks
- 1 February 1999
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 11 (2) , 239-241
- https://doi.org/10.1109/68.740716
Abstract
A tunable optical add-after-drop filter is presented with add and drop functions optimized individually. The add function exhibits a conventional passband, whereas the drop passband is flattened (less than 0.1 dB ripple over more than 0.5 nm). The design is based on the resonant coupler principle. The free spectral range is 6.4 nm and the channel spacing 1.6 nm. The device is realized in a newly developed, high-refractive-index-contrast SiON technology that permits small bending radii of 1.5 mm. Thermo-optic heaters are used to tailor and tune the filter characteristic. The on-chip losses are about 3.5 dB, the wavelength channel isolation is better than 27 dB, and the TE-TM polarization shift is smaller than 0.1 nm.Keywords
This publication has 11 references indexed in Scilit:
- Tunable optical add/drop components in silicon-oxynitride waveguide structuresPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A very short planar silica spot-size converter using a nonperiodic segmented waveguideJournal of Lightwave Technology, 1998
- Crosstalk reduction in a 10-GHz spacing arrayed-waveguide grating by phase-error compensationJournal of Lightwave Technology, 1998
- Large UV-induced negative index changes in germanium-freenitrogen-doped planar SiO 2 waveguidesElectronics Letters, 1998
- WDM: North American deployment trendsIEEE Communications Magazine, 1998
- Tunable polymer optical add/drop filter for multiwavelength networksIEEE Photonics Technology Letters, 1997
- Silica-based optical integrated circuitsIEE Proceedings - Optoelectronics, 1996
- Waveguide EDFA gain equalisation filterElectronics Letters, 1995
- Synthesis of coherent two-port lattice-form optical delay-line circuitJournal of Lightwave Technology, 1995
- Cascaded coupler Mach-Zehnder channel dropping filters for wavelength-division-multiplexed optical systemsJournal of Lightwave Technology, 1994