High-power fiber laser with real-time mode switchability

Wu, Hanshuo; Xu, Jiangtao; Huang, Liangjin; Zeng, Xianglong; Zhang, Pu

doi:10.3788/col202220.021402

Cited by 8 publications

(8 citation statements)

References 34 publications

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“…However, such a fiber laser architecture seems to deviate from the original pursuit of an all-fiber format. In recent years, the invention of AIFG which facilitates the inscription in large-mode-area fibers has become an alternative solution [451][452][453][454][455][456][457][458][459][460][461][462][463][464].…”

Section: Acoustically Induced Fiber Grating (Aifg)mentioning

confidence: 99%

“…In this way, mode conversion among different modes is realized if different radio frequencies are applied. AIFGs contain a variety of flexible working formats: (i) intracavity operation for oscillation mode selection [459]; (ii) tailoring the mode for gain extraction in the amplifier stage through modulating the seed laser mode [464].…”

Section: Acoustically Induced Fiber Grating (Aifg)mentioning

confidence: 99%

“…14b. As for the high-power CW AIFG-based fiber laser, Wu et al have demonstrated a ~ 6 W intracavity mode conversion and agile mode switching with a switching speed between LP 01 and LP 11 of 250 Hz [459] and further boosted its potential in hundred-watt-level mode conversion [464], as shown in Fig. 14c.…”

Section: Acoustically Induced Fiber Grating (Aifg)mentioning

confidence: 99%

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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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Section: Acoustically Induced Fiber Grating (Aifg)mentioning

confidence: 99%

Section: Acoustically Induced Fiber Grating (Aifg)mentioning

confidence: 99%

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

et al. 2022

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“…For example, long-period gratings can be utilized to attenuate the scattered beam, 10 and a large-mode-area fiber or short fiber can reduce the signal light intensity to weaken the SRS. [11][12][13][14] Meanwhile, fiber designs have been considered to suppress SRS, such as the resonant ring filter fibers. In 2005, 15 Zenteno et al first proposed a dual-hole-assisted fiber design, which was effectively immune to SRS and suppressed the Raman gain by more than two orders of magnitude compared with that using the single-mode fibers.…”

Section: Introductionmentioning

confidence: 99%

Wavelength selective bending sensitive multi-ring fiber for suppressing stimulated Raman scattering

He,

Liao,

Wang

et al. 2024

Opt. Eng.

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Stimulated Raman scattering (SRS) must be suppressed owing to its adverse effect on high-power fiber lasers. We propose a bending-sensitive multi-ring fiber composed of three parts: a core, multiple high-refractive-index rings, and a cladding. Appropriate bending of the fiber produces a high loss of the first-order Raman Stokes wavelength at 1114 nm and low loss of the signal wavelength at 1064 nm, thus enabling the signal light to be confined to the core while maintaining singlemode transmission. This principle relies on the resonant coupling between the core and ring modes. Numerical analysis indicated that the loss ratio of the fundamental mode could reach 2650.041 by optimizing the structural parameters. Moreover, when the three-ring fiber was subjected to a bending radius of 6 cm, a bend-induced loss of the Raman wavelength reached 11.315 dB∕m, which effectively suppressed the first Stokes SRS generation.

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“…Moreover, further generation of cylindrical vector beams and vortex beams based on HOMs has also been verified [3][4][5][6][7][8][9] , which finds a tremendous range of applications, including plasmon excitation [10] , optical tweezers [11] , and electron acceleration [12] . So far, several routines to achieve HOMs have been confirmed, such as specially designed fibers [13,14] , lateral offset splicing [15] , long-period fiber gratings (LPFGs) [16][17][18] , few-mode fiber Bragg gratings (FMFBGs) [19][20][21][22] , mode-selective couplers (MSCs) [4,[23][24][25][26][27] , spatial light modulators [28][29][30][31][32] , active polarization control [33,34] , and acoustically induced fiber gratings (AIFGs) [35][36][37][38] .…”

Section: Introductionmentioning

confidence: 99%

Hundred-watt level high-order mode all-fiberized random distributed feedback Raman fiber laser with high mode purity

Hao

et al. 2023

Chin. Opt. Lett.

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An all-fiberized random distributed feedback Raman fiber laser (RRFL) with LP 11 mode output at 1134 nm has been demonstrated experimentally, where an intracavity acoustically induced fiber grating is employed for modal switching. The maximum output power of LP 11 mode is 93.8 W with the modal purity of 82%, calculated by numerical mode decomposition technology based on stochastic parallel-gradient descent algorithm. To our best knowledge, this is the highest output power with high purity of LP 11 mode generated from the RRFL. This work may pave a path towards advanced fiber lasers with special temporal and spatial characteristics for applications.

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High-power fiber laser with real-time mode switchability

Cited by 8 publications

References 34 publications

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

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

Wavelength selective bending sensitive multi-ring fiber for suppressing stimulated Raman scattering

Hundred-watt level high-order mode all-fiberized random distributed feedback Raman fiber laser with high mode purity

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