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Keywords = holmium-doped glasses

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15 pages, 2814 KB  
Article
Triple-Clad Fiber Combiner for Holmium-Doped Fiber Lasers Clad-Pumping
by Nicolas Dalloz, Stefano Bigotta, Thierry Ibach, Christophe Louot, Thierry Robin and Anne Hildenbrand-Dhollande
Photonics 2025, 12(7), 659; https://doi.org/10.3390/photonics12070659 - 30 Jun 2025
Cited by 1 | Viewed by 1460
Abstract
The development of a high-power 7 × 1 triple-clad fiber combiner aimed at resonantly clad-pump holmium-doped fiber lasers is presented. Thanks to the implementation in the combiner of a low refractive index glass capillary, we show that the developed combiner is compatible with [...] Read more.
The development of a high-power 7 × 1 triple-clad fiber combiner aimed at resonantly clad-pump holmium-doped fiber lasers is presented. Thanks to the implementation in the combiner of a low refractive index glass capillary, we show that the developed combiner is compatible with power scaling. Due to the hexagonal arrangement of its seven single-mode input fibers, the presented combiner can also be used in a 6 + 1 × 1 configuration. This characteristic of the fiber component allows for holmium-doped fiber lasers to be studied and developed with both single-oscillator and master-oscillator power amplifier architectures. Full article
(This article belongs to the Special Issue Research and Applications of Optical Fibers)
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9 pages, 1657 KB  
Communication
Fiber-Coupled Multiplexed Independent Ho:ZBLAN Waveguide Chip Lasers in a Single Substrate
by Dale E. Otten, Lachlan Harris, Yongsop Hwang, Dmitrii Y. Stepanov and David G. Lancaster
Photonics 2023, 10(1), 27; https://doi.org/10.3390/photonics10010027 - 27 Dec 2022
Cited by 6 | Viewed by 2876
Abstract
A readily configurable and scalable 2 µm laser source with multi-channel/wavelength fiber output could be advantageous to 2 µm applications such as spectral-beam combination or fiber communications. We report the first experimental realization and characterization of a two-channel holmium-doped zirconium fluoride glass waveguide [...] Read more.
A readily configurable and scalable 2 µm laser source with multi-channel/wavelength fiber output could be advantageous to 2 µm applications such as spectral-beam combination or fiber communications. We report the first experimental realization and characterization of a two-channel holmium-doped zirconium fluoride glass waveguide array laser pumped by a single thulium fiber laser at 1945 nm. Specific laser wavelengths are selected by fiber Bragg gratings (2076.7 nm and 2074.4 nm), and single channel powers of >100 mW are achieved. Design and assembly details, and considerations for future improvements are discussed, including the potential extension to and beyond a 12 channel source. Full article
(This article belongs to the Section Lasers, Light Sources and Sensors)
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14 pages, 4264 KB  
Article
Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium
by Sajid Ali Ansari, Mohammad Omaish Ansari, Ahmed Alshahrie, Mohammad Shahadat, Nazish Parveen, Reem Darwesh and Samia Faisal Aboushoushah
Appl. Sci. 2022, 12(5), 2632; https://doi.org/10.3390/app12052632 - 3 Mar 2022
Cited by 27 | Viewed by 3087
Abstract
The physical, structural, thermal, and optical properties of heavy metal (Ho3+) oxide incorporated lithium-boro-phosphate glass prepared utilizing melt quenching process are presented in this paper as a function of dopant concentration. To support the findings of the FTIR and DSC studies, [...] Read more.
The physical, structural, thermal, and optical properties of heavy metal (Ho3+) oxide incorporated lithium-boro-phosphate glass prepared utilizing melt quenching process are presented in this paper as a function of dopant concentration. To support the findings of the FTIR and DSC studies, many theoretical, experimental, physical, and optical parameters were calculated. XRD and FTIR measurements revealed the prepared glasses’ amorphous nature and the presence of significant borate functional groups. The optical band gap, Urbach energy, and steepness characteristics were tested to validate the structural results. The emission spectrums were recorded in the prepared glasses for an excitation of 450 and 550 nm to find powerful emission color. The color co-ordinates (0.33, 0.41) were found to be quite comparable to white light color co-ordinates. The present glasses can, therefore, be ideal candidates for possible applications with light-emitting diodes. Full article
(This article belongs to the Special Issue Laser Technologies and Nonlinear Optics in Surface Sciences)
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17 pages, 1981 KB  
Review
Laser Sources Based on Rare-Earth Ion Doped Tellurite Glass Fibers and Microspheres
by Elena A. Anashkina
Fibers 2020, 8(5), 30; https://doi.org/10.3390/fib8050030 - 11 May 2020
Cited by 65 | Viewed by 10656
Abstract
In recent years, huge progress has been made in the development of rare-earth ion doped tellurite glass laser sources, ranging from watt- and multiwatt-level fiber lasers to nanowatt level microsphere lasers. Significant success has been achieved in extending the spectral range of tellurite [...] Read more.
In recent years, huge progress has been made in the development of rare-earth ion doped tellurite glass laser sources, ranging from watt- and multiwatt-level fiber lasers to nanowatt level microsphere lasers. Significant success has been achieved in extending the spectral range of tellurite fiber lasers generating at wavelengths beyond 2 μm as well as in theoretical understanding. This review is aimed at discussing the state of the art of neodymium-, erbium-, thulium-, and holmium-doped tellurite glass fiber and microsphere lasers. Full article
(This article belongs to the Special Issue Fiber Laser Sources)
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