Journal ArticleDOI
Highly nonlinear near-resonant photodarkening in a thulium-doped aluminosilicate glass fiber
TLDR
The result shows that absorption of infrared light of moderate intensity can lead to photoionization in rare-earth-doped glass, provided that a multiphoton stepwise excitation channel exists.Abstract:
Permanent photoinduced optical attenuation has been observed in Tm(3+)-doped aluminosilicate glass fibers on exposure to near-resonance mode-locked 1064-nm radiation at 300 K. The rate of this darkening was observed to follow a 4.7 +/- 0.4 power dependence on the 1064-nm intensity. The result shows that absorption of infrared light of moderate intensity can lead to photoionization in rare-earth-doped glass, provided that a multiphoton stepwise excitation channel exists.read more
Citations
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Journal ArticleDOI
High Power Fiber Lasers: A Review
TL;DR: In this article, the fundamental properties and latest developments in high-power fiber lasers are summarized and reviewed, focusing primarily on the most common fiber laser configurations and the associated cladding pumping issues.
Journal ArticleDOI
Tm-Doped Fiber Lasers: Fundamentals and Power Scaling
TL;DR: In this article, fundamental measurements of the properties of thulium-doped silica and power scaling studies of fiber lasers based on the material were described. But the results were limited to the case of a 25mum-diameter, 0.08 numerical aperture (NA) core.
Journal ArticleDOI
Measuring photodarkening from single-mode ytterbium doped silica fibers.
TL;DR: A fast, simple and repeatable method to measure and compare the photodarkening rate caused by the formation of photoinduced structural transformations from Yb-doped single-mode fibers is presented.
Journal ArticleDOI
Photodarkening in Yb doped fibers: experimental evidence of equilibrium states depending on the pump power.
TL;DR: It is concluded that on average 3 to 4 excited Yb ions create or bleach one color center responsible for the core excess loss in Yb doped fibers.
Journal ArticleDOI
Photodarkening in Yb-doped aluminosilicate fibers induced by 488 nm irradiation
S. Yoo,Chandrajit Basu,Alexander J. Boyland,Collin Sones,Johan Nilsson,Jayanta K. Sahu,David N. Payne +6 more
TL;DR: In this paper, the photodarkening of Yb-doped aluminosilicate fibers by continuous wave 488 nm irradiation was investigated and the irradiation induced significant excess loss in the UV-visible spectroscopy (VIS) region in Ybdoped Al-O 2.
References
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Journal ArticleDOI
Frequency upconversion in Tm- and Yb:Tm-doped silica fibers
TL;DR: In this article, the upconversion of Tm3+-doped and Yb3+sensitized Tm 3+doped silica fibers to blue and UV has been studied under excitation in the red (660 nm) and infra-red (1.064 µm).
Journal ArticleDOI
Ultraviolet-induced distributed-feedback gratings in Ce 3 + -doped silica optical fibers
TL;DR: Nondegenerate four-wave mixing was used to write permanent distributed-feedback refractive-index gratings in a Ce3+-doped (80 parts in 106), aluminosilicate, single-mode glass optical fibser with a corresponding change in the refractive index Δn = 2.5 × 10−5 at 808 nm.
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Photoinduced second-harmonic generation in rare-earth-doped aluminosilicate optical fibers.
Denise M. Krol,Jay R. Simpson +1 more
TL;DR: The presence of defect states in the band gap is an essential ingredient of recent models of photoinduced second-harmonic generation (SHG) in fibers and such states are created by doping aluminosilicate glass fibers that do not contain Ge with Ce or Eu and SHG from 1.06-microm light is observed.
Journal ArticleDOI
Characteristics of laser-induced gratings in Pr 3+ - and Eu 3+ -doped silicate glasses
TL;DR: In this paper, four-wave mixing techniques are used to produce laser-induced gratings in Pr3+-doped silicate glasses for the first time to our knowledge. But, under excitation conditions similar to those in previous experiments, no laserinduced grating could be produced.
Journal ArticleDOI
Photochromic behaviour of thulium-doped silica optical fibres
TL;DR: In this article, the photochromic effect in thulium (Tm3+) doped silica optical fibres was observed and the first observation of photochromics was made.