Spectrum-Manipulable Hundred-Watt-Level High-Power Superfluorescent Fiber Source

Ye, Jun; Xu, Jiangming; Zhang, Yang; Song, Jiaxin; Leng, Jinyong; Zhang, Pu

doi:10.1109/jlt.2019.2911007

Cited by 30 publications

(6 citation statements)

References 34 publications

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“…The experimental setup is a forward-pumped Raman oscillator, as shown in Figure 1(a). A home-made amplified spontaneous emission (ASE) source is used as the pump, with a wavelength tuning range of 1050-1080 nm and 3-dB bandwidth of 1.7 nm [49] . The usage of ASE as the pump source instead of the classical fiber-cavity-based oscillator has the advantages of low coherence and high temporal stability, which could reduce the intensity noise and improve the laser performances [50][51][52] .…”

Section: Methodsmentioning

confidence: 99%

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

et al. 2022

High Pow Laser Sci Eng

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Quantum defect (QD) is an important issue that demands prompt attention in high-power fiber laser. Large QD may aggravate the thermal load in the laser, which would impact the frequency and amplitude noise, mode stability and threaten the security of high-power laser system. Here, we propose and demonstrate a cladding-pumped Raman fiber laser (RFL) with QD <1%. Using the Raman gain of the boson peak in a phosphorusdoped fiber to enable the cladding pump, the QD is reduced to as low as 0.78% with a 23.7 W output power. To our knowledge, this is the lowest QD ever reported in claddingpumped RFL. Furthermore, the output power can be scaled to 47.7 W with a QD of 1.29%. This work not only offers a preliminary platform for the realization of high-power low-QD fiber laser, but also proves low-QD fiber laser's great potential in power scaling.

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Section: Methodsmentioning

confidence: 99%

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

et al. 2022

High Pow Laser Sci Eng

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“…In recent years, tunable optical filters (TOFs) operating in low-power regimes (typical power capabilities of several milliwatts or watts) have been proposed to enable high-power laser output [432][433][434][435][436][437][438][439][440][441]. Commercial TOFs with different central wavelengths and filtering bandwidths are adopted to modulate the intracavity feedback or the front stage of fiber amplifier (namely, the seed laser).…”

Section: Tunable Fiber Filtermentioning

confidence: 99%

“…In the architecture of tunable SFS, the seed laser is first regulated by a TOF and then enters the main amplifier. A 120-W SFS amplifier was constructed successfully, whose operating wavelength could be tuned from 1050 to 1075 nm continuously with a linewidth tunability from 0.4 to 15.2 nm [440]. Recently, the maximum output power was further increased to 2010 W, in which the tunable linewidth range covers 2.5-9.7 nm [441], as schematically shown in Fig.…”

Section: Tunable Fiber Filtermentioning

confidence: 99%

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

et al. 2022

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The success of high-power fiber lasers is fueled by maturation of active and passive fibers, combined with the availability of high-power fiber-based components. In this contribution, we first overview the enormous potential of rare-earth doped fibers in spectral coverage and recent developments of key fiber-based components employed in high-power laser systems. Subsequently, the emerging functional active and passive fibers in recent years, which exhibit tremendous advantages in balancing or mitigating parasitic nonlinearities hindering high-power transmission, are outlined from the perspectives of geometric and material engineering. Finally, novel functional applications of conventional fiber-based components for nonlinear suppression or spatial mode selection, and correspondingly, the high-power progress of function fiber-based components in power handling are introduced, which suggest more flexible controllability on high-power laser operations. Graphical abstract

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“…As can be seen, the results mentioned above focus on the narrowband operation and/or wavelength tunability of high power SFSs, but in fact, a SFS with more flexible output spectra (namely, independent tuning of both wavelength and linewidth) can significantly benefit the applications ranging from imaging, RFLs and spectral beam combination [7,16,17]. In 2019, we developed a spectrum-manipulable SFS with a wavelength tuning range of 1050-1075 nm and a linewidth tuning range of 0.4-15.2 nm [28]. However, the maximum output power is limited to a hundred-watt level due to the available pump power.…”

Section: Introductionmentioning

confidence: 99%

“…The numerical apertures (NAs) of the core and inner cladding are 0.075 and 0.46, respectively, and the cladding absorption for the 915 nm pump light is about 1.2 dB/m. Two broadband isolators (ISOs) are utilized to block the backward feedback [28] . The broadband SFS seed is then spliced with a customized fiber-pigtailed BA-TOF, which enables the independent tuning of the operating wavelength over a range of 1050-1100 nm, and the filtering passband over 0.5-25 nm.…”

Section: Introductionmentioning

confidence: 99%

2-kW-level superfluorescent fiber source with flexible wavelength and linewidth tunable characteristics

Fan

et al. 2021

High Pow Laser Sci Eng

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Superfluorescent fiber source (SFS) with tunable optical spectrum has shown great application potential in sensing, imaging and spectral combination. Here we demonstrate for the first time, a 2-kilowatt-level wavelength and linewidth tunable SFS.Based on a flexible filtered SFS seed and three stages of fiber amplifiers, the output power can be scaled from milliwatt level to about 2 kW, with a wavelength tuning range of 1068-1092 nm and a linewidth tuning range of 2.5-9.7 nm. Moreover, a numerical simulation is conducted based on the generalized nonlinear Schrödinger equation, and the results reveal that the wavelength tuning range is limited by the decrease of seed power and the growth of amplified spontaneous emission, while the linewidth tuning range is determined by the gain competition and nonlinear Kerr effects. The developed wavelength and linewidth tunable SFS may be applied to scientific research and industrial processing.

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Spectrum-Manipulable Hundred-Watt-Level High-Power Superfluorescent Fiber Source

Cited by 30 publications

References 34 publications

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

2-kW-level superfluorescent fiber source with flexible wavelength and linewidth tunable characteristics

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