Coherent light source and production method thereof
OwnerYasuo Kitaoka, Kiminori Mizuuchi +2inventors
InventorsYasuo Kitaoka, Kiminori Mizuuchi, Kazuhisa Yamamoto, Shinichi Takigawa
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Abstract
The emission angle and emission position of coherent light source are controlled with high precision. A wavelength-variable DBR semiconductor laser (1) and an optical waveguide-type QPM-SHG device (2) are mounted on a submount (7), and the submount (7) is fixed inside a package (11), thus obtaining a coherent light source. Reference lines (A) and (B) serving as reference markers when fixing the submount (7) are formed on a submount fixing face of the package (11).
Claims26
A coherent light source in which at least a semiconductor laser and an optical waveguide device are mounted on a submount, and the submount is fixed inside a package,
- wherein a reference marker serving as a reference when fixing the submount is formed on a submount fixing face of the package.
A coherent light source in which at least a semiconductor laser and an optical waveguide device are mounted on a submount, and the submount is fixed inside a package,
- wherein when θ (<90°) is an angle between the optical waveguide on the optical waveguide device and an emission-side end face of the optical waveguide device and n is an effective refractive index of the optical waveguide, then the angle θ3 between a normal on an emission-side end face or an emission window of the package and the reference line substantially satisfies the following Equations 1 to 3:
- θ1=90°−θ (Equation 1) θ2=sin−1(n×sin θ1) (Equation 2) θ3=90°−θ2 (Equation 3)
A coherent light source in which at least a semiconductor laser and an optical waveguide device are mounted on a submount, and the submount is fixed inside a package,
- wherein an emission window for outputting light is formed in an emission-side end face of the package, and the emission window is formed at a left-right asymmetric position in the emission-side end face of the package.
A coherent light source in which at least a semiconductor laser and an optical waveguide device are mounted on a submount, and the submount is fixed inside a package,
- wherein the optical waveguide on the optical waveguide device and a lateral face of the package are substantially parallel, wherein an emission window for outputting light is formed in an emission-side end face of the package, the lateral face of the package and the emission window are not perpendicular to one another, and when θ (<90°) is an angle between the optical waveguide and the emission-side end face of the optical waveguide device and n is an effective refractive index of the optical waveguide, then the angle θ3 between a normal on the emission window of the package and the emission-side end face of the optical waveguide device substantially satisfies the following Equations 4 to 6:
- θ1=90°−θ (Equation 4) θ2=sin−1(n×sin θ1) (Equation 5) θ3=90°θ2 (Equation 6)
A coherent light source in which at least a semiconductor laser and an optical waveguide device are mounted on a submount, and the submount is fixed inside a package, wherein a reference plane serving as a reference when fixing the submount is formed in a portion of the package.
A method for manufacturing a coherent light source in which at least a semiconductor laser and an optical waveguide device are mounted on a submount, and the submount is fixed inside the package, wherein the submount is fixed by referencing a reference marker formed in a submount fixing face of the package or a virtual reference line or virtual reference point determined deliberately from two or more reference points.
Dependencies are inferred from the claim text.