Method of tuning optical components integrated on a monolithic chip

A method of tuning of a photonic integrated circuit (PIC), comprising the steps of:

• providing a plurality of integrated modulated sources of different wavelengths in the PIC which produce a plurality of modulated signals together representing a modulated source wavelength grid;
• providing an integrated optical combiner that is wavelength selective and has a wavelength grid for receiving modulated signals from the modulated sources for multiplexing the modulated signals to form a single output signals;
• providing a first tuning element associated with each of the modulated sources;
• providing a second tuning element associated with the optical combiner;
• and
• adjusting the first and second tuning elements so that the wavelength grid of modulated sources substantially matches the wavelength grid of the optical combiner.

A method of tuning optical components integrated on a monolithic chip comprising the steps of:

• providing a group of first optical components each fabricated to have an operating wavelength approximating a desired wavelength on a first wavelength grid;
• including with each of the first optical components, a first wavelength tuning component;
• providing a second optical component integrated on the chip and optically coupled to the first optical components and having a second wavelength grid;
• and
• including with the second optical component, a second wavelength tuning component;
• and
• tuning the first and second optical components through their respective first and second wavelength tuning components to adjust the first and second wavelength grids to be closer to one another.