iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Optical interconnects became important to AI because accelerator clusters need to move huge amounts of data, while fast electrical connections become harder to scale as their reach, power use and signal integrity are pushed. Silicon photonics did not begin with AI: decades of research led to silicon-based photonic circuits, then pluggable data-center transceivers, and now efforts to bring optical conversion closer to processors and switches. The AI boom has made that next step more urgent, but it has not made every electrical link obsolete.
What are optical interconnects and silicon photonics?
An optical interconnect carries information as light, usually through fiber, between points in a computing or communications system. Silicon photonics is an integration and manufacturing approach: it uses silicon to make compact optical components and waveguides, bringing photonic functions into semiconductor-style circuits. It is not simply a faster fiber cable. Fiber is the medium in many links; silicon photonics is one way to build the devices that generate, guide, modulate or detect the light at the ends of a link.
A working optical link still needs electrical circuitry. Data originates in electronic processors and switches, is converted into an optical signal, travels through an optical path, then is converted back to an electrical signal for the receiving electronics. The useful engineering question is not whether a system is “optical” or “electrical” in the abstract, but where those conversions happen, how far the signal must travel electrically, and how the components can be manufactured, connected and serviced.
Silicon is attractive because it can guide light in compact structures and is compatible with processes developed for semiconductor manufacturing. The integration idea made it possible to pursue dense photonic integrated circuits and more economical transceiver production. Light sources such as lasers can be external to the silicon circuit or integrated with it through hybrid or heterogeneous approaches; silicon does not have to provide every optical function by itself.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
How did silicon photonics develop before AI?
The foundations predate today’s AI clusters by decades. A 2024 Nature Communications roadmap dates silicon-based photonic integrated circuits to 1985 and low-loss silicon-on-insulator waveguides to 1991–92. A 2013 review likewise describes the mid-1980s as the start of foundational work on silicon photonic platforms and waveguides.
Those milestones matter because the technology had to solve more than the basic problem of sending light. Researchers needed a way to confine and guide it, manipulate optical signals, detect them, and connect those functions to electronic systems. Semiconductor-compatible fabrication offered a route to repeatable, compact components, but practical products also depended on light sources, packaging, electronics and systems that could use the photonic devices.
The chronology is therefore a progression from research platform to network component to closer processor integration—not a sudden invention prompted by generative AI.
Recommended Free Tools
Milestones in the path to AI infrastructure
- 1985: Silicon-based photonic integrated circuits are introduced, according to the 2024 Nature Communications roadmap.
- 1991–92: Low-loss waveguides are demonstrated in thick silicon-on-insulator processes, according to the same roadmap.
- Mid-1980s onward: Foundational silicon platforms and waveguides develop; CMOS processing becomes a central economic advantage, as described in a 2013 Journal of Modern Optics review.
- 2004: Intel identifies this as the start of its silicon-photonics research at Intel Labs.
- 2010s: Silicon-photonics transceivers enter volume data-center deployment. Intel says it has shipped millions of photonic integrated circuits and integrated lasers in transceiver modules for hyperscale cloud providers.
- June 2024: Intel demonstrates an optical compute interconnect chiplet co-packaged with a CPU.
- December 2024: IBM announces polymer optical waveguide research aimed at co-packaged optics.
- March 2025: NVIDIA announces Spectrum-X and Quantum-X photonics switches for AI factories.
Why did AI make optical links more urgent?
Training and inference workloads distribute computation across large groups of GPUs and other accelerators. Those devices must exchange data with one another and with the rest of the system. As bandwidth demands rise, longer or faster electrical paths can face greater signal loss, power costs and signal-integrity challenges. Optical links can carry high aggregate bandwidth over fiber without the same reach-related electrical loss, while optical I/O can move the conversion point closer to the processor.
This is a pressure to change the economics and layout of interconnects, not proof that optics are automatically superior everywhere. A short electrical connection inside a package may remain appropriate; a fiber link may be advantageous over a longer distance or at higher aggregate bandwidth. The choice depends on where a link sits, the required bandwidth and reach, and how much complexity the optical components add to assembly and maintenance.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Intel described the motivation in June 2024: “The ever-increasing movement of data from server to server is straining the capabilities of today’s data center infrastructure, and current solutions are rapidly approaching the practical limits of electrical I/O performance.” That is the company’s rationale for its optical I/O work, rather than an independent measurement of every data center’s limits.
What is the difference between electrical links, pluggable optics and co-packaged optics?
The main distinction is how much of the path is electrical and how close the optical conversion sits to the processor or switch. Pluggable optics established a commercial foothold in data centers; on-board and co-packaged approaches move optical components closer to the chips in stages.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →| Approach | Where conversion happens | What it means for integration and service | What the cited material establishes |
|---|---|---|---|
| Electrical link | Data remains electrical over the connection. | It avoids an optical conversion at that link, but longer and faster electrical paths face increasing loss, power and signal-integrity pressure. | No specific bandwidth, energy-per-bit or reach values are given for a general electrical link. |
| Pluggable optical transceiver | Optical conversion is in a module that plugs into network equipment. | The optical module is separate from the switch or processor silicon. Intel documents volume data-center use and describes laser sources in pluggable modules as a way to support serviceability in its switch architecture explanation. | Intel reports millions of PICs and integrated lasers shipped in transceiver modules; the source material does not give a universal per-module bandwidth or energy figure. |
| On-board optics | Optical components sit on the board, closer to the electronic device than a front-panel pluggable module. | It is an intermediate integration concept between pluggable modules and optics packaged with the chip. The available announcements do not provide a common product specification or maturity comparison for this category. | No specific bandwidth, energy, reach or deployment figure is established here. |
| Co-packaged optics (CPO) | Optical engines are integrated in the same package or closely alongside switch or processor silicon. | Shorter electrical paths can reduce the burden on high-speed electrical I/O and component count. Integration can make access and serviceability important design trade-offs. | Intel and NVIDIA describe different demonstrations or products; their figures are not a like-for-like independent comparison. |
“Pluggable optics” and “silicon photonics” are not opposites. A pluggable transceiver can use silicon photonics internally; the first term describes how a module fits into a system, while the second describes a photonic integration approach. Likewise, co-packaged optics describes placement and packaging, not one single design or guaranteed performance level.
What have Intel, IBM and NVIDIA demonstrated or announced?
The three companies illustrate different points in the move toward optical I/O: a CPU-adjacent optical chiplet, package-level optical waveguides, and photonics switches. Their public figures are company-reported demonstrations, research claims or product comparisons, not independent benchmark results.
Intel: an optical I/O chiplet with a CPU
In June 2024, Intel demonstrated a silicon-photonics photonic integrated circuit with on-chip lasers and amplifiers, co-packaged with an Intel CPU as an optical compute interconnect chiplet. Intel reported up to 4 Tbps of bidirectional transfer, 64 channels operating at 32 Gbps per direction, operation to 100 meters, and approximately 5 pJ per bit in the prototype.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
These numbers describe Intel’s prototype demonstration. They do not establish the performance of a generally available product or supply a direct, independently measured comparison with other interconnect designs. The demonstration is significant as an example of moving optical I/O toward a processor package, rather than leaving all optical conversion in a separate pluggable module.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteIBM: polymer optical waveguides for co-packaged optics
In December 2024, IBM announced a polymer optical waveguide process intended for co-packaged optics, with the goal of connecting chips, boards and servers at higher bandwidth and better energy efficiency. IBM Research says the approach can increase optical “beachfront density” sixfold. Beachfront density refers to the optical connection capacity available along an edge where components connect; IBM’s sixfold figure is a company research claim, not a general result for every CPO system.
IBM described its work as a polymer optical waveguide developed for this kind of integration. It is distinct from a claim that every existing server or board already uses such waveguides, and the announcement does not make the process a general-purpose retail product.
NVIDIA: photonics switches for AI networks
In March 2025, NVIDIA introduced Spectrum-X and Quantum-X photonics switches for AI factories. NVIDIA announced 1.6 Tbps per port and claimed 3.5 times better power efficiency and 10 times better resilience than traditional methods. These are NVIDIA’s product-announcement figures and comparisons; they should not be treated as independently verified results or generalized to all optical switches.
NVIDIA’s technical explanation says its design integrates optical engines with switch silicon, removes external digital signal processors (DSPs), and keeps laser sources in pluggable modules for serviceability. That design illustrates a central CPO trade-off: placing optics close to the switch can shorten electrical paths, while keeping a laser source modular can help preserve a service path for a component that may need replacement.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Does co-packaged optics replace fiber or ordinary transceivers?
No. Co-packaged optics changes where optical engines and electrical-to-optical conversion sit in the equipment; it does not eliminate fiber as a transmission medium. Nor does it mean that every pluggable transceiver becomes obsolete. Pluggable modules have already served as a practical way to use optical links in data-center networks, and they can remain useful where modularity and service access matter.
Moving conversion nearer to a switch or processor can reduce the length of demanding electrical paths and may lower the number of components between the chip and the optical connection. But tighter integration also changes packaging, thermal, manufacturing and repair considerations. A system designer has to weigh those factors against the bandwidth and power pressure that motivated the move in the first place.
The announcements show a direction of travel, not a single universal endpoint. Intel’s prototype places optical I/O beside a CPU; IBM’s waveguide research addresses connections across package, board and server boundaries; NVIDIA’s announcements target switches. Each targets a different system level, so their figures should not be lined up as if they were competing measurements of the same device.
What should a buyer or system designer compare?
A useful evaluation starts with the actual link and workload, not with the word “photonics.” Public announcements provide examples, but they do not establish a common set of comparable specifications across electrical links, pluggable optics, on-board optics and CPO.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minute- Bandwidth and topology: Identify whether a figure is per lane, per port, or aggregate bidirectional capacity. Intel’s 4 Tbps figure is bidirectional prototype capacity; NVIDIA’s 1.6 Tbps figure is per port. Those labels matter, and the values are not directly interchangeable.
- Energy boundary: Ask which components a per-bit estimate includes. Intel reported approximately 5 pJ/bit for its OCI prototype, but the available material does not establish that this figure covers the same system boundary as other vendors’ claims.
- Reach: Determine the distance between the relevant endpoints. Intel reported operation to 100 meters for its prototype, while the other cited announcements do not offer a directly comparable reach figure.
- Signal integrity and electrical path: Consider how much high-speed electrical trace remains between the chip and the optical conversion point. The closer the optics, the more the design can target the electrical I/O constraint—but the integration and packaging requirements grow.
- Serviceability: Find out which components can be replaced independently. NVIDIA says its approach retains laser sources in pluggable modules, whereas more integrated elements may be less modular.
- Manufacturing maturity: Separate a research announcement or prototype from volume deployment. Intel’s history with transceiver modules is evidence of prior commercial deployment; the 2024 CPU co-packaged demonstration and IBM’s waveguide announcement represent different stages.
- Ecosystem and fit: Check compatibility with the intended switch, processor, packaging process, fiber plant and operating procedures. The cited announcements do not establish universal interoperability or availability across systems.
Where is silicon photonics likely to matter most in AI systems?
Its clearest role is where a system must move high aggregate data rates and electrical reach or power becomes a limiting factor. That includes data-center network links, connections between switches and accelerator systems, and emerging optical I/O designs that bring conversion near a processor. The strongest current rationale is not that light computes faster, but that optical transport can help move data between electronic components without asking long electrical paths to carry ever-higher rates.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
The scale of adoption will depend on more than optical performance. System makers need reliable packaging, manufacturable optical components, suitable lasers, compatible electronics and a workable service model. Silicon photonics’ semiconductor-process compatibility is an economic and integration advantage, but it does not remove the complexity of assembling optical and electronic systems.
What is established is a historical sequence: foundational silicon photonics research, commercial transceiver deployment, then increasingly integrated optical I/O and switch designs motivated by AI infrastructure demands. What remains less established from the cited announcements is a standardized, independently benchmarked comparison across product categories or a claim that CPO has already displaced pluggable optics at scale.
Frequently Asked Questions
Is silicon photonics the same thing as fiber optics?
No. Fiber optics describes sending signals through optical fiber, while silicon photonics describes integrating optical functions on silicon-based circuits. A system can use fiber for its link and silicon-photonic devices at one or both ends.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Why do optical systems still need electrical components?
Processors and switches handle data electronically, so optical links need circuitry to convert electrical signals into light and back. The goal of optical I/O is to place that conversion where it can help the system, not to remove electronics from computing.
Why might a switch keep its lasers in removable modules?
A separate laser module can make the light source easier to access or replace than a component buried inside a tightly integrated package. NVIDIA says its announced switch design retains pluggable laser sources for serviceability.
Are AI photonics switches available for ordinary home networks?
The cited announcements describe enterprise networking platforms aimed at AI factories, not consumer networking products. They do not establish home availability, consumer compatibility or retail pricing.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
