Patent ID: 7088747
Filing Date: 2006-08-08
Classification: B82Y,G02B,H01S

Abstract:
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 laser light source for inputting light with a plurality of wavelengths into said photonic crystal; and an output structure for outputting light in a predetermined waveband that is selected by said photonic crystal; wherein the laser light source is a semiconductor laser having two opposed end faces for emitting light, light outputted from one of the end faces is inputted to a reflecting mirror through said photonic crystal, a laser resonator is constructed between said reflecting minor and the other one of the end faces, and the other one of the end faces is optically coupled with said output structure, and the waveband of light to be outputted from said output structure changes in accordance with an external force applied by said external force applying means.