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Rod Fiber

EuroPhotonics
Oct 2009
NKT Photonics A/SRequest Info
 
NKTPhotonics.jpgNKT Photonics A/S has released a new version of its Crystal Fibre series of double-clad rod-type fibers. The DC-200-85-Yb-ROD, developed using patented air-clad technology, features low photodarkening and is used in output stages of amplifier chains for pulsed laser amplification. It has a 65-μm mode field diameter ytterbium core, and its 200-μm pump core diameter accepts light at numerical aperture values up to 0.54 for pumping at 915 to 976 nm with absorption of 30 dB/m at 976 nm. Designed for OEM use, the fibre can be used also with existing fibre amplifiers or as a replacement for traditional crystalline rods. It is available in various forms, including bare fibre, end-sealed, cleaved or end-capped.


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GLOSSARY
photodarkening
The effect that the optical losses in a medium can grow when the medium is irradiated with light at certain wavelengths.
pulsed laser
A laser that emits energy in a series of short bursts or pulses and that remains inactive between each burst or pulse. The frequency of the pulses is termed the pulse-repetition frequency.
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