A semiconductor laser module includes: a semiconductor laser element which emits
laser light; a waveguide-type optical wavelength selection element which includes
an optical waveguide, and selects a first portion of the laser light having a predetermined
wavelength; and an optical wavelength conversion element which converts a second
portion of the laser light having the predetermined wavelength to wavelength-converted
laser light having a converted wavelength. The semiconductor laser element, the
waveguide-type optical wavelength selection element, and the optical wavelength
conversion element are coupled. The semiconductor laser element contains a multiple-quantum-well
active layer including a plurality of quantum-well sublayers, where one of the
plurality of quantum-well sublayers is different from another of the plurality
of quantum-well sublayers in thickness and/or composition.
