Technologies for signal amplification for a photonic integrated circuit
AssigneeIntel Corporation
InventorsHiroki Tanaka, Bai Nie, Kristof Darmawikarta, Hari Mahalingam
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Abstract
Techniques for signal amplification for a photonic integrated circuit (PIC) die are disclosed. In the illustrative embodiment, an optical fiber is coupled to an input signal waveguide in a glass interposer, and an input signal waveguide of a PIC die is coupled to the input signal waveguide of the glass interposer. In order to compensate for any coupling losses, the input signal waveguide of the glass interposer is active, amplifying an input signal. Light in a pump waveguide near the input signal waveguide pumps ions in the input signal waveguide into a population inversion, allowing them to amplify the input signal.
Claims25
An apparatus comprising:
- a laser;
- a glass substrate comprising:
- a pump waveguide, wherein an output of the laser is coupled to the pump waveguide;
- and
- a signal waveguide, wherein at least a portion of the pump waveguide is adjacent the signal waveguide, wherein the signal waveguide is doped with an element that, when pumped by the laser, amplifies a signal in the signal waveguide, wherein the signal waveguide is a first signal waveguide, wherein the pump waveguide is a first pump waveguide;
- and
- a photonic integrated circuit (PIC) die comprising a detector coupled to the signal waveguide,
- wherein the apparatus further comprises a beam splitter disposed in a cavity defined in the glass substrate to split the laser into a first mode and a second mode, wherein the first mode is coupled to the first pump waveguide,
- wherein the glass substrate further comprises:
- a second pump waveguide, wherein the second mode of the laser is coupled to the second pump waveguide;
- and
- a second signal waveguide, wherein at least a portion of the second pump waveguide is adjacent the second signal waveguide, wherein the second signal waveguide is doped with an element that, when pumped by the laser, amplifies a signal in the second signal waveguide.
An apparatus comprising:
- a glass interposer comprising a signal waveguide, wherein the signal waveguide is an input signal waveguide, wherein the glass interposer further comprises an output signal waveguide;
- a photonic integrated circuit (PIC) die comprising a detector coupled to the signal waveguide;
- means for amplifying a signal in the signal waveguide;
- and
- means for amplifying a signal in the output signal waveguide.
Dependencies are inferred from the claim text.