Optical fibers for DUV

Carbon Coated H2 Loaded

This fiber has been specially developed for DUV applications where photodarkening (also known as solarization) becomes main reason of transmission decrement during utility time caused by UV exposure. New fiber shows excellent stability of transmission after short time of exposure. Transmission recovery occurs when UV exposure is removed.


  • Improved transmission at DUV
  • Recovery of fiber after UV exposure has been removed
  • Fiber is hermetically encapsulated by Carbon coating
  • Carbon coating works as screen

Relative transmission change at 214 nm under Deuterium lamp exposure

Relative transmission change at 214 nm after Deuterium lamp exposure (recovery)

Technical details

Improved transmission at: 190-250nm

Operating wavelengths: 190-1100nm

Structure of fiber: Synthetic silica core/F-doped reflecting cladding/Carbon coating/Polyimide jacket

Hydroxyl content in core: 600-800ppm

NA: 0.22 ± 0.02 as standard

Fiber glass diameters: 100-660 μm as standard, larger upon request

Operating temperature: -190° C to +150°C

Proof test: minimum 70 kpsi, others upon request

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