Technologies for optical demultiplexing with backwards compatibility
AssigneeIntel Corporation
InventorsWenhua Lin, Saeed Fathololoumi, Pegah Seddighian, Tiehui Su, David Chak Wang Hui
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Abstract
In one embodiment, a silicon photonic integrated circuit (PIC) includes a pair of Mach-Zehnder Interferometers (MZI) with a phase shifter to function as a 1×2 optical switches. On one path between the MZIs is a wavelength interleaver. The MZI switch can be controlled to either an all-pass mode or a by-pass mode, therefore setting configurable optical demultiplexing bandwidths to support dual 1.6T FR8/800G FR4 network backward compatibility. The configurable multiplexer operates at set-and-forget mode for the entire operating temperature and the product's lifetime.
Claims25
A photonic integrated circuit (PIC) die comprising:
- a first switch comprising an input, a first output, and a second output;
- a wavelength interleaver comprising an input, a first output, and a second output, wherein the first output of the first switch is connected to the input of the wavelength interleaver;
- and
- a second switch comprising a first input, a second input, and an output, wherein the first input of the second switch is connected to the second output of the first switch, wherein the second input of the second switch is connected to the first output of the wavelength interleaver.
A photonic integrated circuit (PIC) die comprising:
- an input waveguide;
- a first plurality of output waveguides;
- a second plurality of output waveguides;
- and
- means for demultiplexing light from the input waveguide to the first plurality of output waveguides and the second plurality of output waveguides,
- wherein the means for demultiplexing light can be set to a first configuration and can be set to a second configuration,
- wherein, in the first configuration, the means for demultiplexing light demultiplexes light in a first set of channels to the first plurality of output waveguides,
- wherein, in the second configuration, the means for demultiplexing light demultiplexes light in a second set of channels to the first plurality of output waveguides and the second plurality of output waveguides,
- wherein each channel in the first set of channels overlaps with at least two channels in the second set of channels.
A method for using a photonic integrated circuit (PIC) die, the method comprising:
- connecting an optical fiber to the PIC die;
- determining a channel spacing associated with a plurality of channels associated with the optical fiber;
- and
- configuring an adaptive demultiplexer on the PIC die based on the determined channel spacing,
- wherein the PIC die comprises:
- a first switch comprising an input, a first output, and a second output;
- a wavelength interleaver comprising an input, a first output, and a second output, wherein the first output of the first switch is connected to the input of the wavelength interleaver;
- and
- a second switch comprising a first input, a second input, and an output, wherein the first input of the second switch is connected to the second output of the first switch, wherein the second input of the second switch is connected to the first output of the wavelength interleaver.
Dependencies are inferred from the claim text.