A semiconductor laser device, an optical device and a method of producing the same.

摘要

A semiconductor laser device and an optical device is disclosed. The semiconductor laser device includes a semiconductor laser chip, an optical device, and a supporting member for supporting the semiconductor laser chip and the optical device. The optical device includes a reflection diffractive optical lens which diffracts part of the laser light emitted from the emitting end face of the semiconductor laser chip, to form diffracted light beams, and allows a diffracted light beam having a selected wavelength among the diffracted light beams to be incident on the emitting end face, whereby the wavelength of the laser light emitted from the semiconductor laser chip can be stabilized. The optical device includes a substrate having a first and a second main faces, a first optical element formed on either one main face, and a second optical element formed on the main face together with the first optical element. The second optical element has a reflection diffractive grating structure which reflects and diffracts part of laser light emitted from a semiconductor laser chip to form a plurality of orders of diffracted light beams, and allowing diffracted light beams having a selected wavelength among the plurality of orders of diffracted light beams to be incident on the emitting end face of the semiconductor laser chip, whereby the wavelength of laser light emitted from the semiconductor laser chip can be stabilized. A method of producing the semiconductor laser device and the optical device is also disclosed.