Photodarkening rate in Yb-doped silica fibers

Koponen, Jorma; Söderlund, Mikko; Hoffman, Hanna J.; Kliner, Dahv A. V.; Koplow, Jeffrey P.; Hotoleanu, Mircea

doi:10.1364/ao.47.001247

Cited by 102 publications

(61 citation statements)

References 29 publications

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“…Photodarkening can be greatly reduced when the population inversion is low. Hence, our results suggest that potentially photodarkening effect will be negligible in the Yb-doped fiber laser [22] and therefore an output power of more than 250W is achievable before being limited by the Raman process [23]. …”

Section: Modeling Of the 1179 Nm Lasermentioning

confidence: 99%

Multi-watts narrow-linewidth all fiber Yb-doped laser operating at 1179 nm

Kalita¹,

Alam²,

Codemard³

et al. 2010

Opt. Express

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An all-fiber, narrow-linewidth, high power Yb-doped silica fiber laser at 1179 nm has been demonstrated. More than 12 W output power has been obtained, corresponding to a slope efficiency of 43% with respect to launched pump power, by core-pumping at 1090 nm. In order to increase the pump absorption, the Yb-doped fiber was heated up to 125 o C. At the maximum output power, the suppression of amplified spontaneous emission was more than 50 dB. Furthermore, theoretical work confirms that the proposed laser architecture can be easily scaled to higher power.

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Section: Modeling Of the 1179 Nm Lasermentioning

confidence: 99%

Multi-watts narrow-linewidth all fiber Yb-doped laser operating at 1179 nm

Kalita¹,

Alam²,

Codemard³

et al. 2010

Opt. Express

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“…Other properties that can be used to overcome limitations of rare-earth-doped fiber sources are instantaneous pump-to-Stokes conversion and immunity to self-Q-switching. Photodarkening is another problem with Yb-doped fibers [6]. This can occur also in FRLs, especially with highly germanium-doped fibers (as often used for FRLs), operating at visible wavelengths at high power densities.…”

Section: Introductionmentioning

confidence: 99%

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

et al. 2015

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We describe novel fiber Raman lasers pumped directly by spectrally combined high power multimode laser diodes at ∼975 nm and emitting at ∼1019 nm. With a commercial multimode graded-index fiber, we reached 20 W of laser output power with a record slope efficiency of 80%. With an in-house double-clad fiber, the beam quality improved to M 2 = 1.9, albeit with lower output power and slope efficiency due to higher fiber loss. We believe this is the first publication of a fiber Raman laser cladding-pumped directly by diodes.

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“…These types of radiation exposures lead to the excitation of electrons and the subsequent formation of color centers in the materials 7,11 . This photodarkening effect in turn gives rise to changes in optical transmission, loss and luminescent band structure, impacting optical performance 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Gamma radiation effects in Yb-doped optical fiber

Philip

Schneider

Simmons-Potter

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

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Determination of the radiation response of doped-fiber laser materials, systems and components to relevant ionizing radiation fluxes is central to the prediction of long-term fiber-based laser performance/survivability in adverse and/or space-based environments. It is well known that optical elements that are placed into orbit around the Earth experience harsh radiation environments that originate from trapped-particle belts, cosmic rays, and solar events. Of particular interest to optical materials is the continuous flux of gamma photons that the materials encounter. Such radiation exposure commonly leads to the formation of color centers in a broad range of optical materials. Such color center formation gives rise to changes in optical transmission, loss and luminescent band structure, and, thus, impacts long-term optical device performance.In this paper we will present the results of our investigation of gamma-radiation-induced photodarkening on the passive optical transmittance of a number of ytterbium-(Yb-) doped optical fibers. We will discuss the evolution of the optical response of the fiber across the 1.0 to 1.6 micron wavelength window with increasing gamma exposure. Results indicate that these fibers exhibit reasonable radiation resistance to gamma exposures typical of a 5-year, low-earth-orbit environment. Maximum transmittance losses of less than 10% were observed for total gamma exposures of 2-5 krad (Si).

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Photodarkening rate in Yb-doped silica fibers

Cited by 102 publications

References 29 publications

Multi-watts narrow-linewidth all fiber Yb-doped laser operating at 1179 nm

Multi-watts narrow-linewidth all fiber Yb-doped laser operating at 1179 nm

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

Gamma radiation effects in Yb-doped optical fiber

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