Multichannel phase-sensitive amplification in a low-loss CMOS-compatible spiral waveguide.

Area of Science:

• Photonics and Optical Engineering
• Integrated Optics

Background:

• Phase-sensitive amplification (PSA) is crucial for optical signal processing.
• Developing compact, efficient PSA devices is essential for advanced optical networks.

Purpose of the Study:

• To investigate single-channel and multichannel PSA in a highly nonlinear, CMOS-compatible spiral waveguide.
• To derive an analytic solution for maximum PSA gain in lossy Kerr media.

Main Methods:

• Utilized a highly nonlinear, CMOS-compatible spiral waveguide.
• Performed single-channel and multichannel amplification experiments.
• Derived an analytic solution for phase-sensitive gain.

Main Results:

• Achieved a net gain of 10.4 dB and 24.6 dB extinction ratio for single-channel PSA.
• Demonstrated 5 dB gain and 15 dB extinction ratio over a 24 nm bandwidth for multichannel PSA.
• Developed an analytic solution for calculating maximum phase-sensitive gain.

Conclusions:

• The spiral waveguide enables efficient on-chip optical amplification and regeneration.
• The derived analytic solution provides design guidelines for PSA-based amplifiers.
• On-chip integration of optical regeneration and amplification is feasible.