50-GHz-Spacing Athermal Mach–Zehnder Interferometer-Synchronized Arrayed-Waveguide Grating With Improved Temperature Insensitivity
| Autor: | Masaki Kohtoku, Tsugumichi Shibata, Mikitaka Itoh, Tsutomu Kitoh, Shin Kamei |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Demultiplexer business.industry Grating Mach–Zehnder interferometer Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Arrayed waveguide grating law.invention Interferometry Optics law Wavelength-division multiplexing Channel spacing Electrical and Electronic Engineering business Passband |
| Zdroj: | IEEE Photonics Technology Letters. 21:1205-1207 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2009.2021271 |
| Popis: | We describe a technique designed to compensate for the residual temperature sensitivity of an athermal silica-based arrayed-waveguide grating (AWG) and its application to a 50-GHz-spacing multi/demultiplexer with a low loss and a wide passband. The device has a Mach-Zehnder interferometer (MZI)-synchronized configuration, in which the AWG and the MZI are athermalized with resin-filled grooves. The point is that we employ a temperature-dependent phase-generating coupler (TD-PGC) in the MZI to compensate for the second-order temperature dependence of the AWG passband wavelength. The fabricated device exhibits practical characteristics including a low loss of less than 3.5 dB and a wide 0.5-dB bandwidth of 24.1 GHz as well as a reduced wavelength variation of less than 10 pm in a - 5degC to 65degC temperature range. |
| Databáze: | OpenAIRE |
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