We build tools for fiber optic network engineers and ISPs — from free browser-based calculators to AI-powered commercial software that finds fiber breaks faster and cuts downtime costs.
Fiber optic networks are the backbone of modern connectivity. When they fail, businesses go dark, emergency services are disrupted, and repair crews spend hours locating a fault that could be pinpointed in minutes with the right tools. Our mission is to build those tools — precise, practical, and accessible to every engineer who maintains the networks the world depends on.
Optical Path Engineering was founded by a fiber optic network engineer with hands-on experience designing, building, and troubleshooting real networks. Every tool we build comes from a genuine need encountered in the field — not a product roadmap meeting.
We build software that engineers actually want to use: fast, technically accurate, free where it can be free, and priced fairly where it can't. We don't build for press releases or investor decks. We build for the technician on a ladder at 2am trying to find a cut cable.
Browser-based fiber-optic loss calculator. Compute path loss, power budget, link margin, and max distance for any SMF or MMF link. Used by engineers worldwide.
Seven free tools built for NOC teams and field engineers: SLA breach calculator, outage revenue impact, OTDR dead zone, cable slack correction, PON power budget, notification templates, and fiber color code reference.
AI-powered desktop software for ISPs. Upload an OTDR trace, enter cable route addresses, and the system pinpoints the fiber break to within 500 feet on a satellite map — with street view of the fault location.
Route database, splice documentation, historical outage analysis, and SLA reporting — a full OSP management layer for smaller ISPs who can't justify enterprise GIS platforms.
The Optical Path Calculator handles every significant loss source in a real fiber-optic link:
All calculations run entirely in your browser. No data is ever transmitted to a server, no account is required, and the tool functions offline once loaded.
Open the calculator →For demo requests, service inquiries, or questions about licensing the Optical Path Fault Locator for your organization:
We typically respond within 1–2 business days. For bug reports and feature requests for the free tools, use the contact form.