Radhika Arora, VP/GM Pluggables Silicon Photonics
Kyra Ledbetter, RF Product Manager
Arvind Narayanan, Director, SiGe Product Line
As cloud infrastructure scales and AI workloads accelerate, data centers face unprecedented demand to deliver dramatically higher bandwidth with greater energy efficiency. While compute performance rapidly advances, the system bottleneck has shifted to the optical interconnects and transceivers that link these systems together.
Achieving longer reach, higher bandwidth density and lower energy per bit now demands a fundamental shift in optical module architectures – and the technologies that enable them.
Leadership at 200G/λ: GF’s Scalable Silicon Photonics and High-Performance SiGe Solutions
Data centers are rapidly approaching the limits of electrical interconnects, making silicon photonics the only scalable path forward. Enabling higher per‑lambda (λ) data rates, optical I/Os and packaging‑aware integration, GF’s silicon photonics solutions are redefining how bandwidth scales in next‑generation scale‑up and scale‑out architectures.
GF’s silicon photonics technologies deliver the reach, bandwidth density and energy efficiency required to support the industry’s transition to 200G/λ and beyond. Combined with qualified 300mm manufacturing and wafer-level test capabilities, GF delivers a scalable, flexible, production-ready platform designed to evolve with future data rates and advanced packaging architectures – with capabilities including:
- 200G/λ PAM4 support, fundamental to enable scalable 1.6T transceivers
- Multiple modulator options for high-speed transmitter architectures, including Mach-Zehnder, MicroRing and RAMZI
- High speed photodetectors enabling advanced receiver performance
- Integration of silicon nitride (SiN) waveguides and spot‑size converters for higher optical launch power, improved coupling efficiency and long‑term reliability
- Support for both v-grooves and standard edge coupled fibers
- Through-silicon via (TSV)‑based 2.5D/3D integration to shorten electrical paths, reduce power and enable near‑package and co‑packaged optics at 1.6T
As a compliment, Silicon Germanium (SiGe) remains a critical enabler of high‑performance optical transceivers – powering the analog and mixed‑signal electronics that drive and receive optical signals.
After enabling industry‑leading 100G/λ deployments with our SiGe8XP technology, GF is positioned to lead the transition to 200G/λ with its added high-performance SiGe solutions – including 9HP+. GF’s SiGe 9HP+ platform sets a new benchmark in HBT performance, delivering ft/fmax of 340/410 GHz alongside one of the industry’s most complete BiCMOS offerings. Its combination of high‑speed HBTs, advanced CMOS integration, low‑loss metallization and high‑voltage LDMOS has made it the technology of choice for today’s highest‑performance optical transceivers. Beyond raw transistor speed, SiGe 9HP+ enables critical system‑level advantages:
- Higher integration density for compact, thermally efficient designs
- A robust portfolio of precision passives, including metal resistors, MIM capacitors and transmission lines
- Industry‑leading PDK infrastructure and device models that accelerate design closure and reduce design iterations
Together, these capabilities enable designers to meet the stringent power, bandwidth and aggressive form-factor requirements of the 200G/λ generation.
A Unified Path from Optics to Electronics: Co-integration of Silicon Photonics and SiGe
GF uniquely enables co‑integration of silicon photonics and SiGe, delivering a streamlined, end-to-end solution spanning optics, electrical ICs and advanced packaging. This comprehensive approach reduces system complexity, improves scalability and empowers customers to harness the strengths of both technologies – unlocking the speed, power efficiency and integration required to overcome today’s architectural stopgaps.
Paving the Way to 400G/λ with Next-Generation Photonics and Advanced SiGe BiCMOS
Enabling 400G/λ and beyond requires advancing beyond traditional modulator limits. As it is recognized that silicon alone will face increasing challenges beyond 200G/λ, GF continues to push the boundaries of silicon while also exploring novel materials. This includes a strategy centered around the hybrid and heterogenous integration of high Pockels effect materials – such as thin‑film lithium niobate (TFLN), barium titanate (BTO) and advanced electro‑optic polymers – directly onto our silicon photonics platform to enable ultra‑high bandwidth (>100 GHz) operation at lower drive voltage.
GF has also introduced CBIC, the industry’s first SiGe Complementary BiCMOS platform, to support the leap to 400G/λ. By combining high‑speed SiGe HBTs with a flexible CMOS integration, CBIC enables new power‑efficient transceiver architectures optimized for extreme bandwidth demands – with key advantages including:
- Industry‑leading NPN with ft/fmax > 400GHz, delivering enhanced analog performance
- Support for innovative amplifier topologies that deliver high gain‑bandwidth with significantly reduced power consumption
- A modular approach that allows customers to tailor cost, performance and integration for specific optical module classes
Looking Ahead: Enabling the Future of Optical Systems
As optical data rates advance toward multi‑terabit architectures, innovation across silicon photonics, SiGe and advanced packaging becomes increasingly critical. To empower this, GF’s roadmap focuses on continued HBT performance scaling and advanced 3D integration to enable tighter co-packaging of optical and electrical components.
With a proven foundation and a clear roadmap, GF is committed to spearheading the evolution of optical connectivity technologies that will define the next decade of cloud and AI infrastructure.
Interested in learning more? Connect with GF’s silicon photonics and SiGe experts at OFC and visit us at booth #817 to explore how we’re enabling the next generation of optical connectivity.