Integrated multi-channel wavelength monitor

摘要

An optical-source monitor images and diffracts received optical signals using an optical device that has a reflective geometry. For example, the optical device may include a diffraction grating on a curved surface, such as an echelle grating. By imaging and diffracting the optical signals, the optical device may couple to the optical signals on different diffraction orders of the optical device (which have different carrier wavelengths) from input optical waveguides to corresponding output optical waveguides. Then, output power monitors may measure the output power levels of the optical signals, and control logic may provide wavelength control signals to optical sources that provide the optical signals based on measured output power levels.

主权项

1. An optical-source monitor, comprising:
an optical device, input optical waveguides, output optical waveguides, output power monitors, and control logic, the input optical waveguides configured to convey optical signals having carrier wavelengths, wherein each of the input optical waveguides is configured to convey a plurality of carrier wavelengths simultaneously, and wherein each of the input optical waveguides is arranged to have a different incident angle so that center carrier wavelengths of all the input optical waveguides are diffracted into a same output optical waveguide, wherein corresponding side carrier wavelengths of all the input optical waveguides are diffracted into respective output optical waveguides, wherein the optical device comprises a plurality of input ports, a plurality of output ports, and a reflective geometry, each of the input ports optically coupled to a corresponding input optical waveguide and configured to receive the optical signal for the corresponding input optical waveguide, wherein, for each optical signal of the optical signals, the optical device images and diffracts the optical signal from the corresponding input port using the reflective geometry, and wherein, after imaging and diffracting the optical signal, the optical device optically couples the optical signal to a corresponding output port in the output ports on a different diffraction order of the optical device, wherein each of the output ports is optically coupled to a corresponding output optical waveguide of the output optical waveguides, and wherein each of the output ports is configured to couple the corresponding optical signal to the output optical waveguide for the output port, wherein the output optical waveguides are configured to convey the optical signals, wherein each of the output optical waveguides is configured to receive one carrier wavelength from each of the input optical waveguides.