A portable heat dissipation device is provided for operation with various devices of different purposes for heat dissipation therefrom and includes an enclosure and an air flow generation device. Mach-Zehnder circuit 104 is adjusted in advance such that wavelengths to be controlled are included in a wavelength range that corresponds to the frequency range in which the optical transmittance-optical frequency characteristics curve of the Mach-Zehnder circuit changes steeply. Each of the diffusion components is coupled to the substrate such that the concave surface thereof is between at least some of the plurality of light emitting components and the convex surface thereof.