Spectroscopic properties and quenching mechanism of 2 μm emission in Ho^3+ doped germanate glasses and fibers

Fan, Xiaolan; Kuan, Pei-Wen; Li, Kefeng; Zhang, Lei; Li, Dahai; Hu, Lili

doi:10.1364/ome.5.001356

Cited by 35 publications

(14 citation statements)

References 24 publications

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“…Given the value of the peak absorption cross-section, we finally estimate the peak emission cross-section to σ peak em = 6.0 ± 0.4 10 −25 m 2 . The difference between the peak emission and absorption may seem important, since most of the papers on Ho 3+ -doped fibers report equal amplitudes at the peak [7,18,25,26]. However these authors calculate the emission cross-section using the well-known McCumber relation, assuming that the absorption and emission spectra are equal at the absorption peak.…”

Section: Emission Cross-section Spectrummentioning

confidence: 99%

Realization and simulation of high-power holmium doped fiber lasers for long-range transmission

Gouët¹,

Gustave²,

Bourdon³

et al. 2020

Opt. Express

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We report on our realization of a high-power holmium doped fiber laser, together with the validation of our numerical simulation of the laser. We first present the measurements of the physical parameters that are mandatory to model accurately the laser-holmium interactions in our silica fiber. We then describe the realization of the clad-pumped laser, based on a triple-clad large mode area holmium (Ho) doped silica fiber. The output signal power is 90 W at 2120 nm, with an efficiency of about 50% with respect to the coupled pump power. This efficiency corresponds to the state of the art for clad-pumped Ho-doped fiber lasers in the 100 W power class. By comparing the experimental results to our simulation, we demonstrate its validity and use it to show that the efficiency is limited, for our fiber, by the non-saturable absorption caused by pair-induced quenching between adjacent holmium ions.

show abstract

Section: Emission Cross-section Spectrummentioning

confidence: 99%

Realization and simulation of high-power holmium doped fiber lasers for long-range transmission

Gouët¹,

Gustave²,

Bourdon³

et al. 2020

Opt. Express

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show abstract

“…Then, they were melted in a covered platinum crucible at 1350 °C for 1 h with the protective atmosphere of dry O 2 , after which dry O 2 was incorporated into the melts for 40 min to eliminate the OH − content at 1380 °C. The stir effect caused by bubbles could homogenize the melt and reduce the cluster of the melt 15 . To remove bubbles and stripes, the melts were stirred with a platinum rod and then clarified under dry O 2 atmosphere.…”

Section: Experiments and Measurementsmentioning

confidence: 99%

Highly Tm3+ doped germanate glass and its single mode fiber for 2.0 μm laser

Wen

Tang

Yang

et al. 2016

Sci Rep

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Highly Tm3+ doped optical fibers are urgently desirable for 2.0 μm compact single-frequency fiber laser and high-repetition-rate mode-locked fiber laser. Here, we systematically investigated the optical parameters, energy transfer processes and thermal properties of Tm3+ doped barium gallo-germanate (BGG) glasses. Highly Tm3+ doped BGG glass single mode (SM) fibers were fabricated by the rod-in-tube technique. The Tm3+ doping concentration reaches 7.6 × 1020 ions/cm3, being the reported highest level in Tm3+ doped BGG SM fibers. Using ultra short (1.6 cm) as-drawn highly Tm3+ doped BGG SM fiber, a single-frequency fiber laser at 1.95 μm has been demonstrated with a maximum output power of 35 mW when in-band pumped by a home-made 1568 nm fiber laser. Additionally, a multilongitudinal-mode fiber laser at 1.95 μm has also been achieved in a 10 cm long as-drawn active fiber, yielding a maximum laser output power of 165 mW and a slope efficiency of 17%. The results confirm that the as-drawn highly Tm3+ doped BGG SM fibers are promising in applications that require high gain and high power from a short piece of active optical fiber.

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“…Given the value of the peak absorption cross-section, we finally estimate the peak emission cross-section to σ peak em = 6.0 ± 0.4 10 −25 m 2 . The difference between the peak emission and absorption may seem important, since most of the papers on Ho 3+ -doped fibers report equal amplitudes at the peak [7,18,24,25]. However these authors calculate the emission cross-section using the well-known McCumber relation, and assuming that the absorption and emission spectra are equal at the absorption peak.…”

Section: Emission Cross-section Spectrummentioning

confidence: 99%

Realization and simulation of high power holmium doped fiber laser for long-range transmission

Gouët,

Gustave,

Bourdon

et al. 2020

Preprint

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We report on our realization of a high power holmium doped fiber laser, together with the validation of our numerical simulation of the laser. We first present the rare absolute measurements of the physical parameters that are mandatory to model accurately the laserholmium interactions in our silica fiber. We then describe the realization of the clad-pumped laser, based on a triple-clad large mode area holmium (Ho) doped silica fiber. The output signal power is 90 W at 2120 nm, with an efficiency of about 50% with respect to the coupled pump power. This efficiency corresponds to the state of the art for clad-pumped Ho-doped fiber lasers in the 100 W power class. By comparing the experimental results to our simulation, we demonstrate its validity, and use it to show that the efficiency is limited, for our fiber, by the non-saturable absorption caused by pair induced quenching between adjacent holmium ions.

show abstract

Spectroscopic properties and quenching mechanism of 2 μm emission in Ho^3+ doped germanate glasses and fibers

Cited by 35 publications

References 24 publications

Realization and simulation of high-power holmium doped fiber lasers for long-range transmission

Realization and simulation of high-power holmium doped fiber lasers for long-range transmission

Highly Tm3+ doped germanate glass and its single mode fiber for 2.0 μm laser

Realization and simulation of high power holmium doped fiber laser for long-range transmission

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