Multiwavelength optical sources

An optical device comprising:

• a multi-wavelength optical source comprising:
• a plurality of optically active waveguides configured to provide optical gain having a plurality of output ports configured to output laser light amplified by the plurality of optically active waveguides;
• a photonic integrated circuit (PIC) comprising a plurality of input ports, and a plurality of narrow band optical reflectors configured to reflect at least a portion of light received from the plurality of input ports, and at least one PIC output port configured to output multi-wavelength light comprising laser light having at least two different wavelengths, wherein the PIC further comprises an optical multiplexer optically coupled to the plurality of narrowband optical reflectors and the at least one PIC output port, the optical multiplexer configured to combine light from the plurality of laser sources to form the multi-wavelength light;
• and
• a plurality of polymer waveguides connected to the plurality of input ports of the PIC and the plurality of output ports of the plurality of optically active waveguides, the plurality of the polymer waveguides configured to optically connect the plurality of output ports of the plurality of optically active waveguides to the plurality of input ports to form a plurality of laser sources comprising the plurality of optically active waveguides and respective narrowband optical reflectors, wherein the plurality of optically active waveguides and the PIC are fabricated on at least two separate substrates, wherein the plurality of polymer waveguides comprise polymer cladded polymer waveguides, and wherein the at least one PIC output port comprises a first PIC output port configured to provide a first multi-wavelength output and a second PIC output port configured to provide a second multi-wavelength output.