Thermally wavelength tunable laser having selectively activated gratings
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United States of America Patent
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Aug 24, 2004
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app pub date -
Jan 31, 2002
filing date -
Jan 31, 2002
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Abstract
A thermally wavelength tunable laser includes a core, the core including more than one diffraction grating, and thermo-optical material adjacent to each diffraction grating. By selectively changing the temperature and hence the refractive index in the thermo-optical material adjacent to a chosen diffraction grating, the chosen diffraction grating can be tuned over a selected wavelength range. By selecting different diffraction gratings, different, non-overlapping wavelength ranges can be selected and the laser can be tuned over a broad range of wavelengths.
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