+44 (0)24 7671 8970
More publications     •     Advertise with us     •     Contact us
News Article

Scientists develop novel optical modulators for integrated photonics


Researchers at the University of Central Florida’s College of Optics and Photonics (CREOL) and the University of California, Los Angeles, have published a paper in Nature Communications, detailing a novel class of optical modulators. The scientists say that this new technology will make data transfer over optical fibre communication faster and more efficient.

“Carrying torrents of data between internet hubs and connecting servers, storage elements, and switches inside data centres, optical fibre communication is the backbone on which the digital world is built,” says Sasan Fathpour, the study’s co-author and CREOL professor. “The basic constituents of such links, the optical fibre, semiconductor laser, optical modulator and photoreceiver, all place limits on the bandwidth and the accuracy of data transmission.”

Fathpour says that, in particular, the dispersion of optical fibres, or signal distortion over long distances, and noise of semiconductor lasers, or unwanted signal interference, are two fundamental limitations of optical communication and signal processing systems that affect data transmission and reliability.

He says their research has invented a unique class of optical modulators that simultaneously address both limitations by taking advantage of phase diversity, or varied timing of signals, and differential operations, or comparison of light signals.

By doing so, the researchers have created an advanced “light switch” that not only controls data transmission but does so while comparing the amount and timing of data moving through the system to ensure accurate and efficient transmission.

“Dubbed four-phase electrooptic modulators, the circuit is demonstrated on thin-film lithium niobate, which is an ultracompact platform for integrated photonic applications, including optical communication,” Fathpour says.

The concepts of phase diversity and differential operation existed before this research and have been explored by the UCLA team, he says.

“The problem is that off-the-shelf optical components and existing modulator architectures are not capable of achieving these two operations simultaneously,” Fathpour says. “The compactness of the thin-film lithium niobate platform allows tight integration of several components on the same small chip and helped shaping up the concept of four-phase electrooptic modulators.”

Bahram Jalali, a distinguished professor emeritus and Fang Lu Chair in Engineering in the Electrical and Computer Engineering Department at UCLA, says the concept originated from 25 years of research into time-stretch instruments, an optical slow-motion technique that stands as the most effective method for capturing ultrafast single-shot events.

“Invented at UCLA in the 1990s, time-stretch technology has yielded breakthroughs, such as the creation of the world’s fastest spectrometers, cameras, lidars, velocimeters, oscilloscopes, and more, ultimately uncovering optical rogue waves and the introduction of innovative blood screening microscopes, among other advancements,” Jalali says. “This new electrooptic modulator architecture culminated from the quest to create improved methods for encoding ultrafast data onto a laser beam to enable time stretch instruments with high bandwidth and high sensitivity.”

How the research was performed

The four-phase electrooptic modulator was analysed within the context of a time-stretch system used for analysing signal processing, and a comprehensive analytical model was developed to explain its operation. The technology was also optimised for electro-optic bandwidth and modulation efficiency using simulation tools for fine-tuning.

The application of the four-phase electrooptic modulator in optical communication was also explored. It was shown that the four-phase electrooptic modulator can eliminate common mode noise and dispersion, and simulation results demonstrated its ability to improve signal quality and power budget in optical communication systems.

Ehsan Ordouie was a doctoral student in optics and photonics when the research was conducted and is the study’s lead author. He worked on mathematical modelling, device simulations, chip design, fabrication and more.

He says the innovative device enables both phase diversity and differential operations on a single photonic integrated circuit, thereby cancelling the dispersion penalty, or signal quality degradation, and noise in optical communication links.

“Our experiments demonstrate that this approach eliminates the inherent nulls in the frequency response, which is a significant advancement for photonic time-stretch systems and coherent optical communication systems,” Ordouie says. “Although the proposed modulator is more complex than standard ones, leading to a larger chip size and potentially lower fabrication yield, we believe that the advantages of phase diversity and differential operations justify the added complexity. This breakthrough represents a noteworthy advancement in the practical implementation of photonic systems and opens up new possibilities for faster and more efficient data communication and acquisition.”

UniversityWafer announces new supply silicon-on-insulator substrates
Paratus deploys Infinera GX Series in superhighway network
The first universal, programmable, multifunctional photonic chip
Intel Ignite launches its European cohort of Spring 2024
A large-scale photonic chiplet to power artificial general intelligence
Aeva creates Automotive Center of Excellence in Germany
Luceda Photonics releases new Test Design Kit
PhotonVentures’ second fundraising round brings total to €75 million
New edition of IPSR-I photonics roadmap published
Luceda Photonics and Alter Technology collaborate on PIC assembly
Alcyon Photonics and Applied Nanotools collaborate on photonics PDK
Aire Networks deploys Infinera’s ICE-X pluggable solution
Nexus participates in airborne hazard detection project
CMC Microsystems and ventureLAB support semiconductors in Canada
Startups selected for Luminate NY accelerator announced
POET and MultiLane partner on transceivers
Rapid Photonics receives €300,000 for lithium niobate PIC production
Lumentum announces improvements to 800ZR+ transceivers
Teramount and GlobalFoundries cooperate on silicon photonics
StarIC teams up with GlobalFoundries on silicon photonics
Marvell demonstrates 200G 3D silicon photonics engine
Alphawave Semi and InnoLight collaborate on linear pluggable optics
NewPhotonics introduces PIC with integrated optical equaliser
Pilot Photonics secures €2.5 million from European Innovation Council
Ranovus collaborates with MediaTek on 6.4T co-packaged optics
Stellantis Ventures invests in SteerLight silicon photonics LiDAR
Semilux launches programme to develop LiDAR for autonomous vehicles
Coherent recognises Tower Semiconductor with Outstanding Innovation and Technology Supplier Award
photonixFAB Consortium now open for first prototyping
Roadmap to drive PIC industry forward unveiled
European quantum experts team up on photonic quantum computing
OpenLight Partners with VLC Photonics to Expand Design and Test Capacity

Search the news archive

To close this popup you can press escape or click the close icon.
  • 1st January 1970
  • 1st January 1970
  • 1st January 1970
  • 1st January 1970
  • 1st January 1970
  • 1st January 1970
  • 1st January 1970
  • 1st January 1970
  • View all news 22645 more articles
Register - Step 1

You may choose to subscribe to the PIC Magazine, the PIC Newsletter, or both. You may also request additional information if required, before submitting your application.

Please subscribe me to:


You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in: