Abstract
We report the design and fabrication of a widely tunable optical bandpass filter based on using two identical long-period gratings formed along a polymer channel waveguide with a section of the waveguide core removed. The peak transmission of the passband of the fabricated filter is and the bandwidth of the passband is . The filter is thermally tunable over the C + L band (1520–1610 nm) for both TE and TM polarizations with a temperature control of .
© 2006 Optical Society of America
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