Surface-mount laser apparatus and output optical power monitoring method
Embodiments of the present disclosure relate to a surface-mount laser apparatus. One example apparatus includes an on-chip laser, a passive waveguide, and a waveguide detector. The waveguide detector includes a first ridge waveguide. The on-chip laser includes a second ridge waveguide. The on-chip laser is coupled with the passive waveguide by the second ridge waveguide, and the waveguide detector is coupled with the passive waveguide by the first ridge waveguide.
1. A surface-mount laser apparatus, comprising:
an on-chip laser,
a single passive waveguide, and
a waveguide detector, wherein:
the waveguide detector comprises: a first ridge waveguide, and an electrode, wherein the electrode is configured to connect to a bonding pad on a base board, wherein the base board comprises an optical waveguide; and
the on-chip laser comprises a second ridge waveguide; and the on-chip laser is configured to output test light;
the single passive waveguide is configured to:
split the test light into first test light and second test light, wherein optical energy of the first test light is higher than optical energy of the second test light;
couple the first test light into the optical waveguide of the base board, wherein the first test light is output from the optical waveguide of the base board; and
couple the second test light directly into the waveguide detector; and
the waveguide detector is configured to determine, using the electrode, a photocurrent corresponding to the second test light, wherein the photocurrent is corresponding to optical power of the first test light detected after the first test light is output from the optical waveguide of the base board;
wherein the on-chip laser is coupled with the single passive waveguide by the second ridge waveguide; and
wherein the waveguide detector is coupled with the single passive waveguide by the first ridge waveguide.
2. The surface-mount laser apparatus according to claim 1 , wherein
the first test light is coupled into the optical waveguide of the base board by using an evanescent wave.
3. The surface-mount laser apparatus according to claim 2 , wherein the first ridge waveguide is covered by metal, and wherein the metal is used as the electrode of the waveguide detector.
4. The surface-mount laser apparatus according to claim 1 , wherein
the waveguide detector further comprises a deeply etched cavity surface.
5. The surface-mount laser apparatus according to claim 4 , wherein
the deeply etched cavity surface is covered by a dense substance with a preset thickness.
6. The surface-mount laser apparatus according to claim 4 , wherein the deeply etched cavity surface is a straight surface or an arc surface.
7. The surface-mount laser apparatus according to claim 1 , wherein
an included angle between the first ridge waveguide of the waveguide detector and the second ridge waveguide of the on-chip laser is within a preset range; and
the single passive waveguide comprises a curved waveguide.