A5051592380- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Photorefractive and Nonlinear Optics
- Advanced Antenna and Metasurface Technologies
- Semiconductor Lasers and Optical Devices
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Solid State Laser Technologies
- Advanced Frequency and Time Standards
University of Pennsylvania
2018-2025
Nokia (United States)
2023
Thin-film lithium niobate (TFLN) based frequency doublers have widely been recognized as an essential component for both classical and quantum optical communications. Nonetheless, the efficiency (unit: %/W) of these devices is hindered by imperfections present in quasi-phase matching (QPM) spectrum. In this report, we a thorough experimental study spectral TFLN with varying lengths, ranging from 5 to 15 mm. A non-destructive diagnostic method on scattered light imaging proposed employed...
Millimeter-wave (mm-wave) phased arrays can realize multi-Gb/s communication links but face challenges such as signal distribution and higher power consumption hindering their widespread deployment. Hybrid photonic mm-wave solutions combined with fiber-optics address some of these bottlenecks. Here, we report an integrated photonic-assisted array transmitter applicable for low-power, compact radio heads in fiber to fronthaul links. The utilizes optical heterodyning within electronically...
Metasurfaces can manipulate the amplitude and phase of electromagnetic waves, offering applications from antenna design cloaking to imaging communication. Temporal non-linear metasurfaces also adjust frequency impinging advancing conversion, sensing, quantum systems. Here, we demonstrate a active electronic-photonic metasurface that transfers information an optical wave millimeter-wave beam. The proof-of-concept is designed radiate steerable 28 GHz beam when illuminated with at 193 THz...
Optical frequency synthesizers have widespread applications in optical communication, sensing, and ranging systems. These typically consist of an electro-optical phase-locked loop (EOPLL) that phase locks a widely tunable laser (TL) to the teeth highly stable comb. In this paper, partially integrated synthesizer is reported, where low-noise comb used as reference. proposed architecture, synthesis done two phases. coarse tuning phase, distributed Bragg reflector continuously tuned by...
With the recent advancements in photonic integrated circuits, RF photonics has increasingly been considered as a viable avenue to meet demands of many emerging applications telecommunication, sensing and signal processing. In this paper, an integrated, rapidly tunable, wideband optical delay line is used implement optoelectronic oscillator that can be continuously tuned from 594 MHz 634 MHz. The exhibits relatively flat modulation response at high frequencies (larger than 400 MHz),...
Metasurfaces can manipulate the amplitude and phase of electromagnetic waves, offering applications ranging from antenna design cloaking to imaging communication. Additionally, temporal, non-linear metasurfaces have potential adjust frequency impinging driving advancements in conversion, sensing, quantum systems. Here, we report demonstration a active electronic-photonic metasurface that transfers information an optical wave millimeter-wave (mm-wave) beam. The proof-of-concept is designed...
In the absence of optical frequency dividers, stable combs are often used to provide a direct relationship between laser and an RF source in synthesizer. Here, synthesizer is presented where integrated electro-optical phase-locked loop (EO-PLL) phase-frequency lock tunable (TL) teeth comb. Frequency synthesis performed two phases. coarse tuning phase, TL continuously tuned, passing through reference comb teeth, while tooth indexing system selects desired as EOPLL. Once selected tooth, fine...
Thin-film lithium niobate (TFLN) based frequency doublers have been widely recognized as essential components for both classical and quantum optical communications. Nonetheless, the efficiency of these devices is hindered by imperfections present in quasi-phase matching (QPM) spectrum. In this study, we a thorough analysis spectral TFLN with varying lengths, ranging from 5 mm to 15 mm. Employing non-destructive diagnostic method on scattered light imaging, identify sources waveguide sections...
We unveil the primary origin of imperfections in quasi-phase-matching (QPM) spectrum from thin-film lithium niobate (TFLN) frequency doublers using scattered light imaging. conclude measured spectral distortion arises non-uniformities film thickness.
A rapidly adjustable, continuously tuned optoelectronic oscillator is implemented using an integrated variable delay line. The has a tuning range of 594-634MHz and capable being modulated with frequencies higher than 400MHz.
Photonic-electronic co-design significantly improves the performance of each area and enables new applications. This review focuses on our work electrical control optical phase for synthesis processing microwave signals near-field imaging.