[OFC 2025 Exhibition Report] Dexerials’ New Optical Devices for the 1.6T Era

Highlights from the World’s Largest Optical Communications Exhibition

From March 30th to April 3rd, 2025, OFC 2025 was held at the Moscone Center in San Francisco, USA. As the world’s largest exhibition for optical communications technology, OFC attracts leading experts and companies from around the globe.

Dexerials exhibited at this global event under the theme “Empower Photonics,” showcasing its latest technologies in optical semiconductors and photonic devices. This report summarizes the key trends presented at OFC 2025, along with the highlights of Dexerials’ exhibition.

What is OFC?

The Optical Fiber Communication Conference and Exhibition (OFC) is one of the world’s largest and international events in optical communication and networking technologies. The event brings together a wide range of technologies essential to modern communication infrastructure, including optical transceivers, data center modules, and fiber optic systems.

In 2025, OFC attracted more than 16,700 visitors from over 83 countries, with 685 companies exhibiting their latest innovations.¹
Source: OFC 2025 Press Release

1. https://www.ofcconference.org/en-us/home/news-and-press/press-releases/2025/ofc-2025-concludes-in-san-francisco/ ↩︎

Key Trends from OFC 2025

Celebrating its 50th anniversary, OFC 2025 adopted the theme “Celebrating 50 Years of Optical Networking and Communications,” reflecting on the progress of the industry while also looking ahead to its future.

Particularly notable this year were developments driven by the demand for increased transmission capacity. Key topics frequently discussed across the venue included:

• 1.6 terabit transmission
• Coherent communication (high-speed modulation for long-distance optical links)
• Linear Pluggable Optics (LPO)
• AI-based network optimization
• Multi-core fiber technology
• Quantum networking

In addition, the continued advancement of silicon photonics and the research into 6G communication demonstrated the increasing expectations and demand surrounding optical infrastructure.

These emerging themes were also featured in dedicated sessions, such as:

• Frontiers of Optical Network Architecture in the AI Era
• The Year of Quantum
• The End of Copper

OFC net, a live network environment simulating real-world use, was further enhanced this year. Real-time demonstrations of quantum communications and AI-driven data transmission over 400G/800G networks helped bring theoretical technologies closer to practical applications.

Dexerials Showcases Optical Communication Solutions at OFC

Dexerials’ participation in OFC reflects its strong focus on the photonics business—one of its key strategic areas. Leveraging optical technologies originally developed for display and electronic device applications, the company is now actively expanding into communications through the development of optical semiconductors and photonic devices.

OFC, being one of the world’s most prominent technical exhibitions in this field, served as an important opportunity for Dexerials to demonstrate its technological capabilities and signal a major milestone in the company’s business expansion.

At OFC 2025, under the theme “Empower Photonics,” Dexerials introduced several advanced technologies supporting next-generation networks. Among them, the newly developed Waveguide-Type High-Speed Photo Detector—unveiled for the first time at OFC—drew particular attention. Existing optical semiconductors and devices were also exhibited to showcase both the company’s technological depth and the potential for future expansion.

New Product Unveiled: Waveguide-Type High-Speed Photo Detector

At OFC 2025, Dexerials publicly exhibited its newly developed Waveguide-Type High-Speed Photo Detector for the first time. This product, which consolidates the company’s development efforts to date, features high speed, high sensitivity, and compactness—key requirements for next-generation optical communications—and attracted significant interest from attendees.

This detector adopts a waveguide structure to achieve reception speeds exceeding 400Gbps. Its low capacitance and dark current help reduce bit error rate (BER), ensuring stable signal reception. Supporting both 1.3μm and 1.5μm wavelength bands, it is applicable to optical transceivers for:

• Short-distance, high-speed communication in data centers
• Long-distance, high-speed telecom applications

Targeted applications include:

• 800G / 1.6T / 3.2TbE (PAM4) systems
• 1.6Tbps-class digital coherent communication systems
• Co-Packaged Optics (CPO), which integrate optical components with electronic chips

Short presentations were held at the Dexerials booth to explain the functions and design concepts of the waveguide-type photo detector in detail. It was also announced that prototypes supporting 200Gbaud (C-band) will be available starting in April 2025, sharing the development roadmap and further highlighting the potential of this technology.

Other Featured Technologies

High-speed photodiode “KPDEH16C” series

A high-linearity, low chip capacitance photodetector designed for 400Gbaud coherent systems. It is suitable as a replacement in 800G/1.6T-class data transmission applications.
Product Details

Waveguide-type PD (100Gbaud / 200Gbaud) *Under development

High-speed photodiodes with both high linearity and low capacitance, supporting 100Gbaud and 200Gbaud operations. They are ideal for replacing existing photodetectors in next-generation systems, including 800Gbps / 1.6Tbps / 3.2Tbps, with future applications targeting 200Gbaud coherent transceivers.

Si-photonics PIC *Under development

A compact, high-density photonic integrated circuit (PIC) that integrates multiple optical functions such as polarization multiplexing, modulation/demodulation, and detection. These components are expected to be used in 800Gbps to 1.6Tbps class systems.

Waveplate for WSS (λ = 1550nm) *Under development

A new inorganic waveplate designed for the 1550nm band. It is under development to support the miniaturization and enhanced performance of Wavelength Selective Switches (WSS).

Material Solutions for Optical Communication Modules *Under development

We also introduced materials that support module reliability, miniaturization, and manufacturing efficiency, including high-transmission, low-reflection resins and both UV- and thermo-curable adhesives.

Looking Ahead: Insights Gained from OFC 2025

For Dexerials, OFC 2025 served as a valuable opportunity to share its photonics development results with a global audience. Under the theme “Empower Photonics,” we engaged in dialogue not only about products, but also about the foundation of future networks.

The newly unveiled Waveguide-Type High-Speed Photo Detector generated considerable interest, with many attendees asking detailed questions about its performance and possible applications, as well as expressing interest in future adoption and collaboration. Discussions around existing optical semiconductor products and materials also provided valuable insights into market needs and improvement opportunities.

In particular, we were able to explore the potential of our technologies in emerging areas such as silicon photonics, CPO, and 1.6T-class communication systems.

As a key venue for understanding technological and market directions, OFC remains an essential exhibition. Dexerials will continue to apply the feedback gained at this event to future product development and business proposals.

*Note: Photos used in this article were taken at the OFC 2025 venue. Appropriate measures have been taken to ensure individuals cannot be personally identified.