Effects of ion clustering and excited state absorption on the performance of Ho-doped fiber lasers

Wang, Jiachen; Bae, Narae; Lee, Sang Bae; Lee, Kwanil

doi:10.1364/oe.27.014283

Cited by 16 publications

(22 citation statements)

References 33 publications

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“…Here again, the literature is very scarce about direct measurements of ion pairs concentration. Our value is comparable with the very few measurements reported on holmium doped fibers with similar holmium concentration [17,38].…”

Section: Pair Induced Non-saturable Absorptionsupporting

confidence: 91%

“…With this approximation, we find for example P s = 183 W for P p = 400 W, and a slope efficiency of 47%, both values in excellent agreement with the experimental data. The agreement suggests that our model, with the approximations mentioned above, yields the same accuracy as the complete model presented in [38,40].…”

Section: Discussion On the Power Limitationsupporting

confidence: 71%

“…We note that the value of 2k estimated for our fiber, and validated by our model, is notably lower than the value 2k = 30% inferred in [40] for the fiber tested in [6], with a lower peak absorption of 70 dB/m. However the direct comparison is not relevant, since the fraction of paired ions is known to be highly dependent on the host composition [38,[44][45][46]. The evolution of 2k as a function of the Ho 3+ concentration in our silica hosts is the subject of an ongoing work.…”

Section: Comparison With Numerical Modelingmentioning

confidence: 99%

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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.

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Section: Pair Induced Non-saturable Absorptionsupporting

confidence: 91%

Section: Discussion On the Power Limitationsupporting

confidence: 71%

Section: Comparison With Numerical Modelingmentioning

confidence: 99%

See 1 more Smart Citation

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

“…Background losses were found to be in the range 10-40 dB/km in all of the fibers, hydroxyl content was 1-2 molar ppm. We find these values appropriate to the fabrication methods and low enough not to have any significant detrimental effects on laser characteristics [44].…”

Section: Resultsmentioning

confidence: 78%

“…The excellent slope efficiency of 83.1%, more than 89% of the theoretical efficiency, was achieved in the fiber SD1370. As was already stated by Wang et al [44], such high efficiencies were reported only rarely. The record slope efficiency, 93% of the maximum theoretical value, was published by Heming et al [46] in 2016.…”

Section: Slope Efficiencymentioning

confidence: 69%

Nanoparticle and Solution Doping for Efficient Holmium Fiber Lasers

et al. 2019

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Efficient holmium fiber lasers have been studied as attractive laser sources operating around 2.1 μm. We report on holmium-doped silica fibers prepared by the modified chemical vapor deposition in combination with either a solution-doping method or a nanoparticle-doping method. A set of 15 fibers with various compositions was characterized and compared with respect to their fluorescence lifetime, laser slope efficiency and laser threshold. This set of fibers in wide concentration ranges allowed us to assess reliably the influence of material composition and the influence of doping method. The best-performance fibers exhibited slope efficiency 83.1%, laser threshold 155 mW and a record value of upper laser level lifetime of 1.35 ms. These results were achieved in fibers with holmium concentration lower than 800 molar ppm and Al/Ho molar ratio greater than 70. Significant differences between fibers prepared by solution doping and nanoparticle doping were not observed. The behavior of Al 2 O 3 nanoparticles during fiber preparation is discussed in details.

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Pumping scheme for Holmium‐doped fiber amplifiers using traditional 1480 nm pumps exploiting cascaded lasers implemented using fiber Bragg gratings

Kanwal,

Atieh,

Ghafoor

et al. 2023

Micro & Optical Tech Letters

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Diversity in design is an important factor that enables developers to explore techniques aiming to reduce cost, complexity, and manufacturability. The optical window around 2000 nm is attracting rapid research considerations for the next generation optical networks as a continuation of C‐, L‐, and U‐bands. Optical amplifier is considered to be one of the major research directions in this optical window. Holmium‐doped fiber amplifier is an appropriate component to amplify signals in this optical window. But, the major issue is the pump laser for pumping the Holmium‐doped fiber (HDF) is that it is costly and not readily procurable. In a pioneering design, the authors introduced a method to pump the HDF using traditional 1480 nm pump diode by taking the advantage of cascaded lasers which were made of Erbium‐doped fiber (EDF) and Thulium‐doped fiber (TDF). In this paper, we propose an alternate method for pumping the HDF using commercially available 1480 nm pump diode by exploiting cascaded lasers implemented using two pairs of reflective fiber Bragg gratings (FBGs) and pieces of EDF and TDF. The EDF in the first laser is excited with a standard 1480 nm pump diode to create 1610 nm continuous wave (CW) laser which is used to excite the TDF in the second laser to generate 1950 nm CW laser that is used to pump the HDF. Peak gain of 40.5, 36, and 23 dB can be attained corresponding to –30, –15, and 0 dBm signal powers, respectively at 2055.6 nm signal wavelength. Output powers of 10.5, 21, and 23 dBm are obtained for –30, –15, and 0 dBm signal powers, respectively at 2055.6 nm signal wavelength. Noise figures (NFs) of 5, 4.2, and 4 dB are observed at signal wavelength of 2066.7 nm for signal powers of −30, −15, and 0 dBm, respectively. Penalty of 4.5 dB has been observed both in peak gain and power at 2055.6 nm signal wavelength for signal power of −15 dBm considering the pair induced quenching. Finally, the proposed alternate pumping scheme is compared with the previous pumping scheme in terms of 3 dB gain bandwidth and NF. It has been observed that 88% increase in 3 dB gain bandwidth and 19% decrease in NF at a signal wavelength of 2044.4 nm for signal power of –30 dBm is noticed in the proposed pumping scheme.

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Effects of ion clustering and excited state absorption on the performance of Ho-doped fiber lasers

Cited by 16 publications

References 33 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

Nanoparticle and Solution Doping for Efficient Holmium Fiber Lasers

Pumping scheme for Holmium‐doped fiber amplifiers using traditional 1480 nm pumps exploiting cascaded lasers implemented using fiber Bragg gratings

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