1,720,999 research outputs found
Wavelength-flexible thulium-doped fiber laser employing a digital micro-mirror device tuning element
No full textWe demonstrate a cladding-pumped thulium-doped fiber laser using a digital micromirror device based wavelength selection element. Tunability over 121nm was achieved with up to 8.4W of output power as well as multi-wavelength operatio
Widely-tunable operation of a thulium doped fiber laser between 1654 nm and 2025 nm
No full textThulium (Tm) doped silica has a wide fluorescence emission band spanning the wavelength range from ~1600 nm to 2200 nm making it an attractive laser gain media with a wide range of applications. However, due to the increasingly three-level nature of the Tm transition below 1900 nm, it becomes more challenging to operate towards the shorter wavelength end of the emission band. This problem can be alleviated by combining in-band pumping with an erbium (Er) fibre laser with a core-pumped laser configuration. In previous work, Shen et al demonstrated tunability from 1723 nm to 1973 nm at >1 W power levels in a Tm-doped alumino-silicate fibre laser [1]. Wider tunability (from 1679 nm to 1992 nm) for a watt-level Tm fibre laser has only beenachieved by employing Tm-doped germano-silicate fibre, which benefits from reduced signal absorption below 1800 nm and thus blue-shifted net gain [2]. Here we present a Tm-doped alumino-silicate fibre laser with a tuning range of 371 nm, from 1654 nm to 2025 nm, which represents the widest tuning range reported to date for a Tm-doped silica fibre laser.& more..
Dataset for support of thesis 'Development of Short-wave Infrared Fibre Lasers'
No full textThis dataset supports the University of Southampton Doctoral Thesis "Development of Short-wave Infrared Fibre Lasers".
This dataset contains:
Slope efficiencies and M2 for the key results presented in the thesis, raw data supporting the measurement of aluminium reflectivity, fibre design data
such as refractive index profiles and bend loss values determined in Optifiber, and data supporting the fabrication of a CMS
Associated publications:
M. Burns, P. Shardlow, T. Jefferson-Brain, P. Barua, J. Sahu, W. Clarkson, '47 W Continuous-wave 1726~nm thulium fiber laser core-pumped by an erbium fiber laser,' Optics Letters, vol. 44, no. 21, pp. 5230-5233, 2019.
M. Burns, P. Shardlow, W. Clarkson, 'Widely-tunable operation of a thulium doped fiber laser between 1654~nm and 2025~nm', CJ-7.4, CLEO Europe, 2021.
M Burns, P. Shardlow, P. Barua, T Jefferson-Brain, J. Sahu, W. Clarkson, '47~W 1726~nm operation of a thulium fiber laser pumped in-band by an erbium-only fiber laser', 112600G, SPIE Photonics West, LASE, 2020.
M. Burns, P. Shardlow, P. Barua, T. Jefferson-Brain, J. Sahu, W. Clarkson, 'Thulium-doped Fibre Laser with 25 W Single-mode Output at 1726 nm', CJ\_1\_2, CLEO Europe, 2019.
M. Burns, P. Shardlow, P. Barua, T. Jefferson-Brain, J. Sahu, W. Clarkson, 'High power 1726nm operation of a thulium fiber laser pumped in-band by an erbium-only fiber laser', 108970O, Photonics West, 2019.
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Data for Tunable Holmium-doped Fiber Laser with Multi-watt Operation from 2025 nm to 2200 nm paper
No full textDataset for Clarkson, W. et al. (2019). Tunable holmium-doped fiber laser with multi-watt operation from 2025 nm to 2200 nm. Optics Letters, 44(17), 1-4.</span
Cladding-pumped radially-polarized fiber lasers
No full textDirect excitation of the radially-polarized TM01 mode in cladding-pumped ytterbium-doped and thulium-doped fiber lasers using a novel mode selection scheme is reported. The prospects for scaling to very high power levels are discussed
Tm-doped fibre laser with radially-polarized output beam at 2 µm
No full textDirect excitation of the radially-polarized TM01 mode in a caldding-pumped Tm fibre laser using a novel mode selection technique is reported. The laser yielded 6.4W of output at 1970nm for 27.6W of absorbed pump power
Dataset to support the paper '33 W radially polarized emission from a double-pass Ho:YAG thin-slab amplifier'
No full textDataset for '33 W radially polarized emission from a double-pass Ho:YAG thin-slab amplifier' in Journal of the Optical Society of America B.
This dataset contains the data used in the generation of Figures 2 and 4 in the manuscript.
The figures are as follows:
Fig. 2. Output power curve for the radially polarized Ho:YAG seed laser. Inset, top-left: emission spectrum at 13.2 W. Inset, bottom-right: near-field ring-shaped pump beam profile.
Fig. 4. Output power curve for the Ho:YAG thin-slab amplifier with a 13.2 W seed input. Inset, top-left: simulated variation in pump and seed beam areas along the length of the crystal. Inset, bottom-right: amplifier gain versus absorbed pump.</span
Phase-conjugate self-organized coherent beam combination
No full textRecently, the improvement of diode pumping in solid state lasers and the development of double clad fiber lasers have allowed to maintain excellent laser beam quality with single mode fibers. However, the fiber output power if often limited below a power damage threshold. Coherent laser beam combining (CLBC) brings a solution to these limitations by identifying the most efficient architectures and allowing for excellent spectral and spatial quality. This knowledge will become critical for the design of the next generation high-power lasers and is of major interest to many industrial, environmental, defence and scientific applications. The purpose of this book is to present the more recent concepts of coherent beam combining by the world leaders in the field. After a general presentation of laser beam combining and associated challenges, the book will review functionalities and techniques in details with an emphasis on practical implementations. Thus both scientific and engineering aspects are addressed
Dataset for High beam quality, watt-level, widely tunable, mid-infrared OP-GaAs optical parametric oscillator
No full textData supporting the publications: Fu, Q., Xu, L., Liang, S., Shardlow, P., Shepherd, D., Alam, S-U., & Richardson, D. (Accepted/In press). High beam quality, watt-level, widely tunable, mid-infrared OP-GaAs optical parametric oscillator. Optics Letters. </span
High-beam-quality, watt-level, widely tunable, mid-infrared OP-GaAs optical parametric oscillator
No full textWe demonstrate near-diffraction-limited performance from a mid-infrared, idler-resonant, fiber-laser-pumped, widely tunable, picosecond optical parametric oscillator (OPO) based on orientation-patterned gallium arsenide (OP-GaAs). The OP-GaAs OPO is synchronously pumped by a picosecond Tm:fiber master–oscillator-power-amplifier system. An OPO tuning range of 4394–6102 nm (idler) and 2997–3661 nm (signal) is achieved, with maximum average powers of 1.18 (idler, 5580 nm) and 0.51 W (signal, 3136 nm). The idler beam has M2 values of 1.06 (x-direction) by 1.03 (y-direction)
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