Optical devices and systems for optical source redundancy

A method for optical supply redundancy, comprising:

• outputting light from a first output of a first optical switching device to a photonic integrated circuit (PIC), wherein a first optical source supplies a first optical signal to a first input of the first optical switching device, the first optical switching device comprising a first phase-shift mechanism;
• determining the first optical source has failed based on monitoring, by a first monitor device, optical power of the first optical signal;
• in response to determining that the first optical source has failed, activating a second optical source that supplies a second optical signal to a second optical switching device comprising a second phase-shift mechanism, an output of the second optical switching device is coupled to a second input of the first optical switching device;
• monitoring, by a second monitor device, optical power of the second optical signal output from the second optical switching device;
• tuning a phase difference of the second phase-shift mechanism based on the optical power of the second optical signal monitored by the second monitor device to maximize the optical power of the second optical signal output from the second optical switching device and supplied to the second input of the first optical switching device;
• and
• in response to maximizing the optical power of the second optical signal supplied to the second input of the first optical switching device, tuning a phase difference of the first phase-shift mechanism based on the optical power of the second optical signal monitored by the first monitor device,
• wherein the second optical source is output from the first optical switching device and into the PIC based on the tuning of phase differences of the first and second phase-shift mechanisms.

An optical device comprising:

• a plurality of waveguides coupled to a plurality of optical sources configured to emit light at a common wavelength;
• and
• a plurality of optical switching devices, each optical switching device of the plurality of optical switching devices coupled to a pair of waveguides of the plurality of waveguides and each optical switching device of the plurality of optical switching devices comprising a Mach-Zehnder Interferometer (MZI) having a first branch comprising a capacitive structure coupled to one waveguide of the pair of waveguides and a second branch formed of another waveguide of the pair of waveguides,
• wherein an optical signal from one of the plurality of optical source is steered to an output of the optical device based on tuning phase differences of the MZI by adjusting bias applied to the capacitive structures.