kona, back to some xml and this time applied to laser settings?
gemini ai says, broadcom and jerichoX photonics switch. xml and photonics
Based on the latest Broadcom product roadmaps (as of late 2025), here is the breakdown of the Jericho series, its relationship to photonics, and the likely meaning behind "XML" in this context.
1. Broadcom "JerichoX" and the Photonics Switch
You are likely referring to the Jericho3-AI or the newly announced Jericho4 (Code name: "Ramón" fabric).
The "Jericho" Role: The Jericho chips are designed for massive scale-out networks (like AI clusters). Unlike standard switches, they are designed to build a "Network of Networks" where thousands of GPUs act like one giant computer.
The Photonics Connection (CPO): While Jericho chips are the "brains," Broadcom's "Bailly" switch is the "body" that made headlines for photonics.
Bailly is a switch that uses Broadcom's Co-Packaged Optics (CPO) technology.
Instead of plugging fiber cables into the front of the metal box, the fiber optics go directly inside the box and connect right next to the silicon chip.
Why it matters: This eliminates the copper traces between the chip and the front panel, reducing power consumption by ~70% and allowing for the massive bandwidth needed for AI (51.2 Terabits per second).
Clarification: "Jericho" is the chip family for routing/AI fabrics. "Bailly" is the specific product implementation that integrates the Tomahawk (switching) chip with Photonics (lasers). Jericho chips are now following this same path, integrating optical engines to handle the speed of light directly.
2. "XML" and Photonics: A Likely Acronym Confusion
In the context of Broadcom and Photonics, "XML" is likely a mishearing or typo for one of two critical acronyms:
Option A: EML (Electro-absorption Modulated Laser)
This is the most probable technical match. In high-speed photonics (like those in Broadcom's Jericho/Tomahawk optics), you cannot use simple LED-style blinking (Direct Modulation) because it creates "chirp" and signal distortion at high speeds (800G/1.6T).
What it is: An EML is a laser that stays "on" all the time, with a separate "shutter" (modulator) that flickers to create the 1s and 0s.
Why it matters: Broadcom's high-speed optical engines rely on EMLs (using Indium Phosphide) to achieve the clean, high-speed signals required for AI clusters.
Option B: StrataXGS (Broadcom's Chip Architecture)
If you were reading a datasheet, you likely saw "Broadcom StrataXGS."
What it is: This is the brand name for Broadcom's Ethernet switching architecture (which includes the Tomahawk and Trident families).
Why it matters: It is the underlying logic that powers the switch, which is now being married to the photonics.
Option C: XML (The Software Code)
If you explicitly meant the code language Extensible Markup Language:
Context: XML is used in NETCONF (Network Configuration Protocol).
Usage: To manage these massive optical switches, engineers don't type commands manually. They use automated scripts. The "data model" (the map of the switch's features) is often written in YANG, and the actual messages sent to configure the lasers and ports are encoded in XML.
Summary Table
Acronym/Term Likely Meaning in this Context Explanation
JerichoX Jericho3-AI / Jericho4 Broadcom's premier AI-networking chips designed to handle traffic for thousands of GPUs.
Photonics Switch Co-Packaged Optics (CPO) A switch (like the "Bailly" platform) where lasers are soldered directly next to the silicon chip to save power.
"XML" EML (Laser Type) Electro-absorption Modulated Laser. The specific laser technology needed for high-speed (800G+) optical connections.
Alternative "XML" StrataXGS Broadcom's brand name for their switching chip architecture."
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