Search
Menu

Integrated Photonics Processor Outperforms Wireless Systems

Facebook X LinkedIn Email
MILAN, July 13, 2022 — An international team led by researchers at the Politecnico di Milano has devised a way to separate and distinguish optical beams even when the beams are superimposed, and even when the form in which the beams arrive at a destination is drastically changed and/or unknown. In the researchers’ design, the beams were separated in the optical domain and were simultaneously detected with negligible crosstalk  even when they shared the same wavelength and polarization.

The phenomenon is enabled by a programmable photonic processor built on a 5-mm2 chip that receives all optical beams through microscopic optical antennas integrated onto the chip. A network of integrated interferometers manipulates the beams and separates them on distinct optical fibers, which eliminates interference.

The device allowed information quantities of over 5000 GHz to be managed — a value that the research team said is at least 100× that which current high-capacity wireless systems can manage.

“A peculiarity of our photonic processor is that it can self-configure very simply, without the need for complex control techniques,” said Francesco Morichetti, head of the Photonic Devices Lab at the Politecnico di Milano. “This allows scalability to new versions of the device, capable of handling many beams at the same time, further increasing the transmission capacity. It is also able to adapt in real time to compensate for effects introduced by moving obstacles or atmospheric turbulence, allowing the establishment and maintenance of optimal optical connections.”

An international collaborations has developed a technique to separate and distinguish optical beams even if they are superimposed and the form in which they arrive at their destination is drastically changed and unknown. The development supports the ability to use on-chip designs in applications including precision positioning and self-driving cars. Courtesy of Politecnico di Milano.

 


An international collaboration has developed a technique to separate and distinguish optical beams even if they are superimposed and the form in which they arrive at their destination is drastically changed and unknown. The development supports the ability to use on-chip designs in applications including precision positioning and self-driving cars. Courtesy of Politecnico di Milano.
Like in optical fibers, light in free space can travel in beams that take different shapes, or modes, with each mode carrying a flow of information. The generation, manipulation, and reception of more modes means more the transmission of more information.


However, free space is a more variable environment than an optical fiber, due to atmospheric agents that can alter the shape of light beams or otherwise affect them.

The researchers identified applications that require the advanced processing of free space optics beams: wavefront sensing, phase-front mapping and reconstruction, multiple-beam transmission and imaging through scattering media, and chip-to-chip optical wireless communications. Additionally, high-precision positioning and localization systems, such as self-driving cars, and sensors, remote object detection, portable and wearable devices, and biomedical applications are among those that require the advanced processing of optical beams, the researchers said.

Researchers from Stanford University, the Scuola Superiore Sant’Anna, and the University of Glasgow also participated.

The research was published in Light: Science & Applications (www.doi.org/10.1038/s41377-022-00884-8).

Published: July 2022
Glossary
chip
1. A localized fracture at the end of a cleaved optical fiber or on a glass surface. 2. An integrated circuit.
scattering
Change of the spatial distribution of a beam of radiation when it interacts with a surface or a heterogeneous medium, in which process there is no change of wavelength of the radiation.
positioning
Positioning generally refers to the determination or identification of the location or placement of an object, person, or entity in a specific space or relative to a reference point. The term is used in various contexts, and the methods for positioning can vary depending on the application. Key aspects of positioning include: Spatial coordinates: Positioning often involves expressing the location of an object in terms of spatial coordinates. These coordinates may include dimensions such as...
optical fiber
Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
integrated photonics
Integrated photonics is a field of study and technology that involves the integration of optical components, such as lasers, modulators, detectors, and waveguides, on a single chip or substrate. The goal of integrated photonics is to miniaturize and consolidate optical elements in a manner similar to the integration of electronic components on a microchip in traditional integrated circuits. Key aspects of integrated photonics include: Miniaturization: Integrated photonics aims to...
Research & TechnologyeducationCommunicationschipEuropeAmericasPolitecnico di Milanotelecomdatacomfree spacelight propagationfree space opticsscatteringpositioningSelf-driving carsoptical processingFiber Optics & Communicationsfiber opticsoptical fiberinformation processingphotonic processorintegrated photonics

We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.