Monolithic transmitter photonic integrated circuit (txpic) with a transversely disposed output

An optical device, comprising:

• a substrate having a cleavage plane;
• a plurality of optical sources provided on the substrate, each of the plurality of optical sources supplying a corresponding one of a plurality of optical signals, each of the plurality of optical signals having a corresponding one of a plurality of wavelengths;
• a plurality of heaters, each of which being thermally coupled to a corresponding one of the plurality of optical sources, each of the plurality of heaters being configured to adjust a corresponding one of the plurality of wavelengths;
• and
• an optical combiner provided on the substrate the optical combiner having a plurality of inputs, each of which being configured to receive a corresponding one of the plurality of optical signals, and an output, the output supplying a wavelength division multiplexed (WDM) signal including each of the plurality of optical signals,
• wherein the output of the optical combiner includes a waveguide, the waveguide having an edge portion, the edge portion being tilted relative to the cleavage plane of the substrate.

An optical device, comprising:

• a substrate having a facet;
• a plurality of optical sources provided on the substrate, each of the plurality of optical sources supplying a corresponding one of a plurality of optical signals, each of the plurality of optical signals having a corresponding one of a plurality of wavelengths;
• a plurality of heaters, each of which being thermally coupled to a corresponding one of the plurality of optical sources, each of the plurality of heaters being configured to adjust a corresponding one of the plurality of wavelengths;
• and
• an optical combiner provided on the substrate the optical combiner having a plurality of inputs, each of which being configured to receive a corresponding one of the plurality of optical signals, and an output, the output supplying a wavelength division multiplexed (WDM) signal including each of the plurality of optical signals,
• wherein the output of the optical combiner includes a waveguide, the waveguide having an edge portion, the facet of the substrate being tilted relative to the edge portion.