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

Jiang, Man; Zhang, Pu; Hu, Xiao; Ma, Pengfei

doi:10.1017/hpl.2015.24

Cited by 14 publications

(7 citation statements)

References 26 publications

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“…The SMS design was used in Refs. [19–22] before which suppressed Raman emission and reduced SPM-induced linewidth broadening. However, in this design we attempted to use polarization-maintaining (PM) fibers to construct an SMS cavity.…”

Section: Methodsmentioning

confidence: 99%

kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme

Jiang

Huang

et al. 2017

High Pow Laser Sci Eng

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In this manuscript, we demonstrate high-power, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme. By employing a single-mode-multimode-single-mode structure seed laser, a linearly polarized Yb-doped fiber laser with narrow linewidth and high output power is achieved. This laser, when used as a master oscillator, can be capable of suppressing the ASE in the process of power amplification. Thus, only one-stage amplification structure is used to scale up the laser power, and linearly polarized output with a polarization extinction ration of 14 dB, a narrow linewidth of 0.3 nm and an output power of 1018 W are achieved. Moreover, due to the good beam quality of seed laser and the well-designed amplifier stage, the beam quality of the output laser is near-diffraction-limited with M 2x ∼ 1.18 and M 2 y ∼ 1.24 at the maximum power, and without mode instability occurring.

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Section: Methodsmentioning

confidence: 99%

kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme

Jiang

Huang

et al. 2017

High Pow Laser Sci Eng

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“…[5] with a focus on the opportunities of high-quality beam generation using fiber Bragg gratings (FBGs) as cavity mirrors [7][8][9][10] , whereas second one aims at high-power capabilities based on freespace pump coupling and bulk mirrors cavity [4,11,12] . In the last case, up to 154 W power is obtained at ∼1020 nm [12] , but Raman output at this wavelength is not as interesting, because higher power and narrower linewidth are available from YDFLs [13,14] . In addition, in spite of significant improvement of the output beam quality (M 2 = 4-8) in comparison with that for the pump beam (M 2 ∼ 20) due to the Raman clean-up effect in GRIN fibers, it is far from singlemode regime.…”

Section: S a Babinmentioning

confidence: 99%

High-brightness all-fiber Raman lasers directly pumped by multimode laser diodes

Babin

2019

High Pow Laser Sci Eng

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High-brightness fiber laser sources usually utilize active rare-earth-doped fibers cladding-pumped by multimode laser diodes (LDs), but they operate in limited wavelength ranges. Singlemode-passive-fiber based Raman lasers are able to operate at almost any wavelength being pumped by high-power fiber lasers. One of the interesting possibilities is to directly pump graded-index (GRIN) multimode passive fibers by available high-power multimode LDs at 915–940 nm, thus achieving high-power Raman lasing in the wavelength range of 950–1000 nm, which is problematic for rare-earth-doped fiber lasers. Here we review the latest results on the development of all-fiber high-brightness LD-pumped sources based on GRIN fiber with in-fiber Bragg gratings (FBGs). The mode-selection properties of FBGs inscribed by fs pulses supported by the Raman clean-up effect result in efficient conversion of multimode pump into a high-quality output beam at 9xx nm. GRIN fibers with core diameters 62.5, 85 and $100~\unicode[STIX]{x03BC}\text{m}$ are compared. Further scaling capabilities and potential applications of such sources are discussed.

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“…For optical fiber lasers, spectral linewidth broadening, induced by fiber nonlinearity and dispersion [17][18][19][20], is the main challenge of generating narrow-linewidth lasers with a high output power. The output spectral linewidth of 1,018 nm emitting with an output power of around 100 W has been still more than 75 GHz [21,22]. Another main challenge is the amplified spontaneous emission (ASE) at around 1,030 nm due to its higher gain in YDF than that at 1,018 nm.…”

Section: Introductionmentioning

confidence: 99%

A Narrow-Linewidth Linearly Polarized 1018-nm Fiber Source for Pumping Diamond Raman Laser

et al. 2021

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A 7.8-GHz linewidth ytterbium-doped fiber (YDF) laser with an output power of 75 W at 1,018 nm is demonstrated based on narrow-bandwidth fiber Bragg gratings. Effective suppression of spectral broadening and amplified spontaneous emission is achieved by optimizing the resonator structure and active fiber parameters. An 1,178-nm diamond Raman output pumped by this narrow-linewidth 1,018 nm source is addressed in this study, which shows a promising application of generating the sodium guide star laser at 589 nm. A single-longitudinal-mode Stokes with an output power of 0.6 W is obtained using this multimode 1,018 nm laser at the pump power of 13 W. The impact of pump spectral linewidth on the effective Raman gain coefficient is analyzed, and the laser threshold of the diamond Stokes resonator increases with the broadening of the pump linewidth.

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

Cited by 14 publications

References 26 publications

kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme

kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme

High-brightness all-fiber Raman lasers directly pumped by multimode laser diodes

A Narrow-Linewidth Linearly Polarized 1018-nm Fiber Source for Pumping Diamond Raman Laser

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