Spectrally beam combined fiber lasers for high power, efficiency, and brightness

Afzal, Robert S.; Honea, Eric C.; Savage-Leuchs, Matthias; Gitkind, Niel; Humphreys, Richard; Henrie, Jason; Brar, K.; Jander, Don

doi:10.1117/12.982047

Cited by 9 publications

(3 citation statements)

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“…[14] It is to be noted that, although several high-power Raman fiber lasers with fixed wavelengths have been reported with hundred-watt level output power, [15][16][17][18][19] the output power of tunable Raman fiber lasers is still rather low, i.e., no more than the 10 W level. Besides high output power, linearly polarized operation is also an important demand in many applications owing to high efficiency, [20,21] such as harmonic generation, [22,23] parametric conversion, [24,25] coherent detection, coherent beam combination, [26,27] spectral beam combination, [28,29] and supercontinuum generation. [30,31] Nevertheless, to the best of our knowledge, there have been no reports on high power linearly-polarized tunable Raman fiber lasers yet.…”

Section: Introductionmentioning

confidence: 99%

High-power linearly-polarized tunable Raman fiber laser

Song¹,

Wu²,

Xu³

et al. 2018

Chinese Phys. B

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In this study, we demonstrate an all-fiber high-power linearly-polarized tunable Raman fiber laser system. An inhouse high-power tunable fiber laser was employed as the pump source. A fiber loop mirror (FLM) serving as a high reflectivity mirror and a flat-cut endface serving as an output coupler were adopted to provide broadband feedback. A piece of 59-m commercial passive fiber was used as the Raman gain medium. The Raman laser had a 27.6 nm tuning range from 1112 nm to 1139.6 nm and a maximum output power of 125.3 W, which corresponds to a conversion efficiency of 79.4%. The polarization extinction ratio (PER) at all operational wavelengths was measured to be over 21 dB. To the best of our knowledge, this is the first report on a hundred-watt level linearly-polarized tunable Raman fiber laser.

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Section: Introductionmentioning

confidence: 99%

High-power linearly-polarized tunable Raman fiber laser

Song¹,

Wu²,

Xu³

et al. 2018

Chinese Phys. B

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“…However, for SBC by VBG, combining five channels has only possessed a 1 nm spectral band [7], and for interference filter combining, the combined spectral range covers around 1030 [9] or 1050 nm [10]. Even for diffraction grating SBC, experimental implementation of a spectral band has possessed less than 24 nm [11,[18][19][20], deficient in useful Yb-gain bandwidth covers more than 100 nm.…”

Section: Introductionmentioning

confidence: 99%

Spectral beam combining of fiber laser with wavelength separation broader than 60 nm

Jiang

Zhang

et al. 2016

Laser Phys.

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We report a two-channel spectral-beam-combined 1 µm fiber laser using a diffraction grating that produces 45 W average output power with a 62 nm broad band wavelength, and shows excellent prospects for additional power scaling. The combining efficiency is as high as 95%. To our knowledge, these results represent the broadest wavelength band to date for a beam-combined fiber laser system, which has reached 2.5 times the spectrum of the combined beams previously.

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“…For example, YDFLs at wavelength ranges of 1010-1020 nm with narrow bandwidths can not only be frequency quadrupled to 25× nm for laser-induced fluorescence, optical refrigeration, semiconductor inspection and atomic trapping applications [3][4][5][6][7] but can also be used for tandem-pumping high-power C-band (1.06-1.12 µm) YDFLs, due to their smaller quantum defect which gives higher conversion efficiency and lower thermal load [8,9] . Moreover, as an outstanding pathway for achieving scalable high-power lasers with good beam quality, spectral beam combining (SBC) combines multiple lasers into a single beam for maximum output power [10][11][12][13][14][15][16][17] . To date, the most common wavelength range for SBC is from 1050 to 1080 nm.…”

Section: Introductionmentioning

confidence: 99%

A high-power narrow-linewidth 1018 nm fiber laser based on a single-mode–few-mode–single-mode structure

Jiang

Zhang

et al. 2015

High Pow Laser Sci Eng

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We demonstrate an all-fiber high-power Yb-doped 1018 nm fiber laser with a Gaussian-shaped output beam profile based on a mismatched structure, which consists of a pair of single-mode fiber Bragg gratings and a section of few-mode double-cladding gain fiber. The output power is up to 107.5 W with an optical-to-optical efficiency of 63%, and the 3 dB band is 0.26 nm at this power level. Such a structure of single-mode-few-mode-single-mode fiber oscillator can be used to generate high-power narrow-linewidth lasing with excellent beam quality in other spectral ranges.

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Spectrally beam combined fiber lasers for high power, efficiency, and brightness

Cited by 9 publications

References 0 publications

High-power linearly-polarized tunable Raman fiber laser

High-power linearly-polarized tunable Raman fiber laser

Spectral beam combining of fiber laser with wavelength separation broader than 60 nm

A high-power narrow-linewidth 1018 nm fiber laser based on a single-mode–few-mode–single-mode structure

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