Understand the language
Optical Technology Library
Clear explanations of form factors, media, connectors, optical families and cable technologies.
What Is SFP?
Understand the compact pluggable form factor used across established access and uplink speeds.
Open guide → 02What Is QSFP-DD?
Learn how double-density QSFP supports high-capacity 400G and 800G systems.
Open guide → 03What Is QSFP112?
Understand four-lane modules using higher electrical lane rates.
Open guide → 04What Is OSFP?
Review the high-density form factor used in advanced 400G and 800G platforms.
Open guide → 05Single-Mode vs Multimode
Compare fiber media by path, reach, installed plant and optical technology.
Open guide → 06SR, LR, ER & ZR Explained
Understand reach-family labels without treating them as universal specifications.
Open guide → 07DR4 vs FR4
Compare parallel single-mode and wavelength-multiplexed duplex approaches.
Open guide → 08Understanding BiDi Optics
Learn how bidirectional links carry transmit and receive wavelengths on one fiber.
Open guide → 09Understanding DOM and DDM
Use digital diagnostics as operational evidence rather than a compatibility shortcut.
Open guide →