Holmium-doped fluoride fiber laser at 2950 nm pumped at 1175 nm

Talavera, D. V.; Mejía, E. B.

doi:10.1134/s1054660x06030030

Cited by 21 publications

(6 citation statements)

References 13 publications

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“…Exclusive operation at 2.92 μm with maximum output power of 340 mW and a slope efficiency of ∼5% was achieved in a singly Ho 3+ -doped ZBLAN fiber with a concentration of 4.3 mol% [114]. It was recently found that highly stable emission at 2.95 μm can be obtained without colasing at 2 μm when Ho 3+ -doped ZBLAN fiber was pumped at a Raman fiber laser at 1175 nm [115], because the ESA of pump photons in a transition 5 I 7 → 5 I 4 can depopulate the lower laser level and maintain the population inversion in the transition of interest.…”

Section: Infrared Tmmentioning

confidence: 94%

High-Power ZBLAN Glass Fiber Lasers: Review and Prospect

Zhu

Peyghambarian

2010

Advances in OptoElectronics

290

110

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-NaF), considered as the most stable heavy metal fluoride glass and the excellent host for rare-earth ions, has been extensively used for efficient and compact ultraviolet, visible, and infrared fiber lasers due to its low intrinsic loss, wide transparency window, and small phonon energy. In this paper, the historical progress and the properties of fluoride glasses and the fabrication of ZBLAN fibers are briefly described. Advances of infrared, upconversion, and supercontinuum ZBLAN fiber lasers are addressed in detail. Finally, constraints on the power scaling of ZBLAN fiber lasers are analyzed and discussed. ZBLAN fiber lasers are showing promise of generating high-power emissions covering from ultraviolet to mid-infrared considering the recent advances in newly designed optical fibers, beam-shaped high-power pump diodes, beam combining techniques, and heatdissipating technology.

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Section: Infrared Tmmentioning

confidence: 94%

High-Power ZBLAN Glass Fiber Lasers: Review and Prospect

Zhu

Peyghambarian

2010

Advances in OptoElectronics

290

110

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“…Recently, 23 it has been suggested that ESA, specifically ESA1 in the current investigation, was crucial to the operation of a Ho 3+ -doped ZBLAN fiber laser operating on the 5 I 6 → 5 I 7 transition. The authors reported a high slope efficiency of 45%, despite the Stokes efficiency limit of 40%, when the fiber was excited at 1175 nm.…”

Section: Discussionmentioning

confidence: 99%

“…13, and, case 2, fiber laser employing fiber having 0.5 mol % Ho 3+ pumped at 1175 nm which corresponds to the experiment reported in Ref. 23. In the case of the dilute Ho 3+ -doped ZBLAN system, i.e., case 2, the ETU processes were neglected in the rate equation system because it was established that these processes are important for Ho 3+ concentrations above 1 mol %.…”

Section: B Numerical Solution Of the Rate Equationsmentioning

confidence: 99%

Pump excited state absorption in holmium-doped fluoride glass

Librantz

Jackson

Gomes

et al. 2008

Journal of Applied Physics

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The primary excited state absorption processes relating to the 5 I 6 → 5 I 7 3 m laser transition in singly Ho 3+ -doped fluoride glass have been investigated in detail using time-resolved fluorescence spectroscopy. Selective laser excitation of the 5 I 6 and 5 I 7 energy levels established the occurrence of two excited state absorption transitions from these energy levels that compete with previously described energy transfer upconversion processes.

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“…The necessity for mid-power fiber lasers that effectively pump Tm3+-doped ZBLAN blue-UV emitting (upconversion) fiber lasers [1,2] and 3000-nm fiber lasers based on Ho3+-doped ZBLAN fibers for medical applications [3,4], together with the non-commercial availability of high power lasers in the 1100-1200 nm, motivated our research for a way to further optimize a well known approach that we used before, the Raman fiber laser (RFL). Apart from these motivations, a frequency-doubled version to 550-600 nm would benefit other medical applications and may serve to generate artificial stars that are used as guides for adaptive astronomical telescopes [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Shortening of a Raman fiber laser by inserting ytterbium doped fiber

Mejía¹,

Talavera²

2013

IOSRJEN

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-Once reached the threshold for operation, Raman fiber lasers with high output couplers convert the pump signal into stokes signals very efficiently. However, high threshold implies lower overall efficiency and hence the ratio slope efficiency-to-threshold power (i.e., the figure of merit) is low. By maintaining the slope efficiency value and decreasing threshold, the figure of merit (overall efficiency) increases. In this work, we have increased this parameter from 57 (for a typical Raman configuration) to 105 (investigated configuration). This represents an 84% improvement. A threshold of 2.9 watts decreased to 1.3 watts by inserting 1.27 m of ytterbium doped fiber into a 350-m Raman cavity. Another way for obtaining similar results was explored by enlarging the cavity more than double (to 750 m) but power delivery decreased by 20% due to additional fiber loss. The system studied is shorter and more efficient than typical configurations and might be considered given its simplicity. Advantages, disadvantages and other ways for obtaining similar results are discussed.

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Holmium-doped fluoride fiber laser at 2950 nm pumped at 1175 nm

Cited by 21 publications

References 13 publications

High-Power ZBLAN Glass Fiber Lasers: Review and Prospect

High-Power ZBLAN Glass Fiber Lasers: Review and Prospect

Pump excited state absorption in holmium-doped fluoride glass

Shortening of a Raman fiber laser by inserting ytterbium doped fiber

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