Power Scaling of Linearly Polarized Random Fiber Laser

Huang, Long; Xu, Jiangming; Ye, Jun; Liu, Xiaodong; Zhang, Hanwei; Wang, Xiaolin; Zhang, Pu

doi:10.1109/jstqe.2017.2722384

Cited by 21 publications

(7 citation statements)

References 55 publications

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“…The linear fitting result shown in Figure 4(c) indicates that the FWHM linewidth broadening factor of narrowband seed amplification increases with a rate of about 0.5952 nm per kilowatt, which is about 10 times as large as that of broadband seed amplification. This may be induced by the differences of the spectrum density and intensity noise of the seeds [41, 45, 46] . As the linewidth broadening in the narrowband seed amplification is relatively more serious than that in the broadband seed amplification, the optimization of the FWHM linewidth of the employed seed is very important for the design of the powerful SFS system if special output linewidth is required.…”

Section: Resultsmentioning

confidence: 99%

In-band pumping avenue based high power superfluorescent fiber source with record power and near-diffraction-limited beam quality

et al. 2018

High Pow Laser Sci Eng

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High power superfluorescent fiber sources (SFSs), which could find wide applications in many fields such as middle infrared laser generation, Raman fiber laser pumping and spectral beam combination, have experienced a flourishing time in recent years for its unique properties, such as short coherence length and high temporal stability. The challenge for performance scalability of powerful SFS mainly lies on the physical issues including parasitic laser oscillation and modal instability (MI). In this contribution, by employing in-band pumping avenue and high-order transverse-mode management, we explore a high power SFS with record power, near-diffraction-limited beam quality and spectral manipulation flexibility. An ultimate output power of 3.14 kW can be obtained with high temporal stability and a beam quality of M 2 = 1.59 for the amplified light. Furthermore, the dynamics of spectral evolutions, including redshifting of central wavelength and unsymmetrical broadening in spectral wings, of the main amplifier with different seed linewidths are investigated contrastively. Benefiting from the unique high pump brightness and high MI threshold of in-band pumping scheme, the demonstrated system also manifests promising performance scaling potential.

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Section: Resultsmentioning

confidence: 99%

In-band pumping avenue based high power superfluorescent fiber source with record power and near-diffraction-limited beam quality

et al. 2018

High Pow Laser Sci Eng

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“…Just like other kinds of high power lasers, there are mainly two technical categories to achieve high power fiber laser, that is, laser oscillator and laser amplifier. Our group have focused on investigation on both high power fiber laser oscillators and amplifiers [8,33,81,101,[136][137][138][139][140][141][142][143][144][145][146], which would be reviewed in the following paragraphs.…”

Section: Broadband Fiber Lasermentioning

confidence: 99%

“…The optical fiber acts as lasing gain medium and simultaneously a waveguide that confining the laser mode, which could help to significantly increase the beam quality when the laser operates at rather high power level (more than multi-kW level), and the thermal load is also much weakened because of the distribution over a relatively long fiber length [3]. The aforementioned unique properties make fiber laser a hot topic for both academic and industrial communities [8][9][10]. Nevertheless, it is to be noted that there are several physical limitations for single monolithic fiber laser [11][12][13][14][15], which causes the ∼20 kW level upper-limit output power of a diffraction-limited fiber laser.…”

Section: Introductionmentioning

confidence: 99%

Development status of high power fiber lasers and their coherent beam combination

Liu

Jin

et al. 2019

Sci. China Inf. Sci.

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High-power fiber laser has been emerged great potential in a wide range of applications and becomes a robust candidate for high energy solid state laser system. To further increase the output brightness of single-channel fiber laser, high-brightness pump sources and high-power-handling passive components should be fabricated and utilized in the fiber laser systems, in addition to the advanced techniques for multiple nonlinear effects managements. The state-of-the-art high power fiber lasers are reviewed, in terms of narrow-linewidth fiber lasers, broadband fiber lasers and fiber lasers at 2 µm. Coherent beam combining is a promising technique to obtain higher output power while maintaining excellent beam quality simultaneously, which breaks through the bottlenecks of single-channel fiber laser. Based on a series of key techniques for coherent beam combining, high-power coherent beam combining of fiber lasers could be enabled with high combining efficiency. In this paper, we review the progress of high-power fiber lasers and their coherent beam combining in the recent decade, particularly the relevant work in our group. The future prospects of fiber lasers and coherent beam combining technique are also discussed.

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“…Over recent years, RFLs have drawn a great deal of attention, and gradually lead to the realization of high power 3 , 4 , narrow-linewidth 5 – 7 , multi-wavelength 8 , 9 and linearly polarized operation 7 , 10 , 11 . Thanks to the good laser performance and relative simplicity of implementation, RFLs have attracted a large variety of applications, such as frequency doubling to the visible range 12 , sensing and telecommunication 13 – 15 , pump source in mid-infrared laser and supercontinuum light source 16 – 19 , and stable seed for high power fiber master oscillator power amplifier (MOPA) 20 , 21 .…”

Section: Introductionmentioning

confidence: 99%

Flexible spectral manipulation property of a high power linearly polarized random fiber laser

Song

et al. 2018

Sci Rep

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Fiber lasers with flexible spectral manipulation property could provide a flexible tool for scenes where the temporal coherence property accounts, for example, coherent sensing/communication and nonlinear frequency conversion. Due to the good laser performance and relative simplicity of implementation, random fiber lasers (RFLs) based on random distributed feedback and Raman gain have earned more and more attention in the past few years, and a variety of RFLs with substantially different spectral properties have been developed. In this presentation, we demonstrate a high power linearly polarized RFL with flexible spectral manipulation property, in which the central wavelength and the linewidth of the spectrum can be tuned independently through a bandwidth-adjustable tunable optical filter (BA-TOF). The central wavelength of the RFL can be continuously tuned from 1095 to 1115 nm, while the full width at half-maximum (FWHM) linewidth has a maximal tuning range from ~0.6 to more than 2 nm. Moreover, the output power of 1102.5–1112.5 nm reaches ~23 W with polarization extinction ratio (PER) value > 20 dB. To the best of our knowledge, this is the first demonstration of a powerful linearly polarized RFL with both wavelength and linewidth tunability.

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Power Scaling of Linearly Polarized Random Fiber Laser

Cited by 21 publications

References 55 publications

In-band pumping avenue based high power superfluorescent fiber source with record power and near-diffraction-limited beam quality

In-band pumping avenue based high power superfluorescent fiber source with record power and near-diffraction-limited beam quality

Development status of high power fiber lasers and their coherent beam combination

Flexible spectral manipulation property of a high power linearly polarized random fiber laser

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