Variable wavelength light source
First Claim
1. A wavelength tunable light source unit comprising:
- a plastic photonic crystal;
external force applying means for applying an external force to said photonic crystal;
a light source for inputting light with a plurality of wavelengths into said photonic crystal; and
an output part for outputting light in a predetermined waveband that is selected by the photonic crystal, which are installed in a unit.
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Accused Products
Abstract
When a piezoelectric element 3 applies an external force to a plastic photonic crystal, the photonic crystal deforms, and accordingly, the photonic band gap easily changes. When the photonic band gap changes, transmission of light with a specific wavelength is limited. Therefore, light with a desired wavelength is outputted from the photonic crystal 2 upon sufficient tuning, and extracted to the outside through an output window 6. In the present invention, a plastic photonic crystal 2 which can achieve sufficient wavelength tuning although it is small is used, and elements are unitized, so that the entire wavelength tunable light source unit is downsized.
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Citations
5 Claims
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1. A wavelength tunable light source unit comprising:
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a plastic photonic crystal;
external force applying means for applying an external force to said photonic crystal;
a light source for inputting light with a plurality of wavelengths into said photonic crystal; and
an output part for outputting light in a predetermined waveband that is selected by the photonic crystal, which are installed in a unit. - View Dependent Claims (2, 3, 4, 5)
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Specification