<p>Fourier-transform optical pulse shaping is a technique that is crucial in numerous technologies like spectroscopy, communications, optical and radio-frequency signal processing, quantum communications, and more. Commercial WaveShapers – Fourier-transform pulse shapers based on bulk optical elements and spatial light modulators - have enabled rapid and significant advancements in these applications but are limited to >= 10 GHz resolution. Achieving spectral resolution at the single or sub-GHz level is especially sought after in, for example, next generation applications in quantum information processing and RF photonics. Laboratory-scale shapers with resolutions at the 100s of MHz level have been shown, but they require complex alignment, occupy a significant footprint, and impose strong optical losses. To this end, researchers have been pursuing spectral shapers on integrated optical platforms for the benefits of small form-factor and large-scale integration with other subsystems. In this thesis, we will discuss our advancements in developing high-resolution chip-scale pulse shapers using microresonator filter banks with inline phase control. Unlike other integrated spectral dispersers like the arrayed-waveguide grating which requires a large footprint to achieve high spectral resolution, the resolution of the microresonator is limited only by the waveguide propagation losses and the fabrication. We will first discuss the design and characterization of high-resolution microresonator filters on a foundry silicon photonics platform. This will be followed by the experimental demonstration of a high-resolution wavelength selective switch and spectral demultiplexer. Then, we will present results in both classical and quantum domains from a six-channel silicon photonic shaper with a high resolution of 900 MHz. We will discuss in detail techniques which we have developed to realize programmable reconfigurability of our shaper. Our shaper is fabricated through a commercial foundry silicon photonics process and stands out as the highest spectral resolution integrated Fourier-transform pulse shaper to date.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/26970010 |
| Date | 10 September 2024 |
| Creators | Lucas Michael Cohen (19565188) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/MICRORESONATOR-BASED_CLASSICAL_AND_QUANTUM_PULSE_SHAPING_WITH_FOUNDRY_SILICON_PHOTONICS/26970010 |
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