Edge-emitting etched-facet lasers

A laser chip comprising:

• a substrate;
• an epitaxial structure on the substrate, the epitaxial structure including an active region, the active region generating light;
• a first waveguide formed in the epitaxial structure extending in a first direction, the first waveguide having a first front etched facet and a first back etched facet that define a first edge-emitting laser;
• a second waveguide formed in the epitaxial structure extending in the first direction, the second waveguide having a second front etched facet and a second back etched facet defining a second edge-emitting laser;
• and
• a recessed region formed in said epitaxial structure, the recessed region having an opening adjacent to one of the first back etched facet and the second back etched facet, the recessed region facilitating testing of an adjacent laser chip prior to singulation of the laser chip.

A laser chip comprising:

• a substrate;
• an epitaxial structure on the substrate, the epitaxial structure including an active region, the active region generating light;
• a waveguide formed in the epitaxial structure extending in a first direction, the waveguide having a front etched facet and a back etched facet that define an edge-emitting laser;
• and
• a complete opening in the epitaxial structure in a direction parallel to and at a distance from the waveguide facilitating testing of an adjacent laser chip prior to singulation of the laser chip.