Photonic structures including multiple input/output optical couplers

A photonic structure comprising:

• a light source;
• a photonics chip including a semiconductor substrate and a first spot-size converter, the semiconductor substrate having a top surface;
• and
• a first optical coupler including a first mirror disposed adjacent to the first spot-size converter and a first plurality of lenses disposed over the top surface of the semiconductor substrate, the first mirror and the first plurality of lenses configured to direct first light from the light source to the first spot-size converter.

A method of forming a photonic structure, the method comprising:

• forming a first optical coupler including a first mirror disposed at a first height relative to a top surface of a semiconductor substrate of a photonics chip;
• and
• forming a second optical coupler including a second mirror disposed at a second height relative to the top surface of the semiconductor substrate,
• wherein the first optical coupler is configured to reflect first light from a light source to the photonics chip, the second optical coupler is configured to reflect second light from the light source to the photonics chip, the first mirror is disposed between the second mirror and the light source, and the second height is different from the first height.