Short wavelength light source and a laser image forming apparatus

The present invention provides a short wavelength light source, comprising a fundamental wave enters the incident surface and emitting harmonic emission surface of the conversion element converts the above fundamental wave to the harmonic wavelength, and the wavelength conversion element holding portion holding . The wavelength conversion element, in the region designated partial region of the exit side as the wavelength conversion element, the wavelength conversion element described above fundamental wave of the high harmonics due to heat absorption by the wavelength conversion result and said changes the phase matching condition between the higher harmonics is suppressed.