Wavelength converter and two-dimensional image display device

A wavelength converter, comprising:

• a laser resonator including a fiber containing an laser-active material and a fiber grating formed in the fiber;
• a laser light source for emitting an excitation light to the fiber;
• a polarization splitting element provided between the laser resonator and the laser light source;
• and
• a wavelength conversion element for converting a fundamental wave of a laser beam emitted from the laser resonator into a harmonic,
• wherein:
• the laser resonator is constructed to emit a beam polarized in a direction normal to a polarization direction of the laser light source using a polarization maintaining fiber and a single polarization mechanism and includes a pair of reflection surfaces;
• and
• the polarization splitting element is provided between one of the respective reflection surfaces closer to the laser light source and the laser light source to introduce an excitation light in a specified polarization direction emitted from the laser light source to the laser resonator while introducing the fundamental wave emitted from the laser resonator and having a polarization direction normal to the specified polarization direction in a direction deviated from the laser light source.