On-chip tunable long-period grating devices based on liquid crystal photonic bandgap fibers

Lei Wei, Johannes Weirich, Thomas Tanggaard Alkeskjold, Anders Overgaard Bjarklev

Research output: Contribution to journalJournal articleResearchpeer-review


We design and fabricate an on-chip tunable long-period grating device by integrating a liquid crystal photonic bandgap fiber on silicon structures. The transmission axis of the device can be electrically rotated in steps of 45° as well as switched on and off with the response time in the millisecond range. The strength of the loss peak is controlled electrically, and the spectral position of the loss peak is thermally tunable. This compact design results in a stable grating, and enables this device to be more easily applied in practical systems.
Original languageEnglish
JournalOptics Letters
Issue number24
Pages (from-to)3818-3820
Publication statusPublished - 2009

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