High pumping-power fiber combiner for double-cladding fiber lasers and amplifiers

Zheng, Jinkun; Zhao, Wei; Zhao, Baoyin; Li, Zhe; Chang, Chang; Li, Gang; Gao, Qi; Ju, Pei; Gao, Wei; She, Shengfei; Wu, Peng; Hou, Chaoqi; Li, Weinan

doi:10.1117/1.oe.57.3.036105

Cited by 9 publications

(7 citation statements)

References 37 publications

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“…In a paper [69] a (6 + 1) × 1 power combiner was designed in a way that the input fiber bundle diameter is only slightly larger than the output fiber diameter. Authors have used home-made signal fibers at the input and output with core/clad diameter of 30/220 µm and 30/600 µm, respectively.…”

Section: Pump and Signal Power Combinersmentioning

confidence: 99%

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High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

Stachowiak

2018

Photonics

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The most important components for application in high-power all-fiber lasers and amplifiers are, most of all, power combiners, but also mode field adaptors. This paper summarizes recent achievements in the area of development and fabrication of high-power passive fiber components. The principles of operation and basic design and fabrication criteria, which have to be taken into account while designing the aforementioned components, are explained in detail. The most recent impressive achievements are summarized and described.

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Section: Pump and Signal Power Combinersmentioning

confidence: 99%

“…Summary of recently reported pump and signal power combiners[16,[64][65][66][67][68][69][70][71][72].…”

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confidence: 99%

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

Stachowiak

2018

Photonics

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“…This work showed the advantage of side pumping technique that it enhances the pump power through cascaded structure as well as the potential of multipoint distributed pumping. However, compared with TFB 2 C. Lei et al end pumping combiner which can easily achieve (N + 1) × 1 structure (N can be 7 or more) with high coupling efficiency for every pump fiber [13][14][15] , for a tapered-fused side pumping combiner, the increase of pump fibers and high pump coupling efficiency requirement of the components cannot be achieved simultaneously as illustrated in some experimental work. The increased number of pump fibers at one pump point was proven to result in a decrease of pump coupling efficiency in Ref.…”

Section: Introductionmentioning

confidence: 99%

Loss mechanism of all-fiber cascaded side pumping combiner

Lei

Chen

et al. 2018

High Pow Laser Sci Eng

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Compared with end pumping fiber combiner, one of the advantages for side pumping combiner is the unlimited pumping points, which means multi-point or cascaded side pumping can be realized. However, the loss mechanism of the cascaded structure is rarely discussed. In this paper, we present the numerical and experimental investigation about the loss mechanism of a two-stage-cascaded side pumping combiner based on tapered-fused technique. The influence of loss mechanism on the coupling efficiency and thermal load of the fiber coating is analyzed according to simulations and experiments with different tapering ratios for the first stage. Based on the analysis, a cascaded component with total pump coupling efficiency of 96.4% handling a pump power of 1088 W is achieved by employing 1018 nm fiber laser as the pump source. Future work to further improve the performance of a cascaded side pumping combiner is discussed and prospected.

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“…A splice between non-matched fibers can cause leaking of high power radiation, leading to point overheating and even damaging the fiber and the setup. It is often a problem to match commercial components to the fibers used in the experimental setup, which is still under investigation by many research teams [20][21][22][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. It is important to achieve a low transmission loss of the pump radiation, but most of all, it is essential to achieve a very low transmission loss of the signal radiation, which is more expensive than pump radiation (according to price per W).…”

Section: Ref Gain Medium Output Power Pump Power Slope Efficiency Symentioning

confidence: 99%

“…Construction with bulk optics [7] LMA The most important components of all-fiber construction techniques of high-power sources are mode field adaptors (MFAs) and fiber power combiners [20][21][22][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. MFAs enable signal transmission between two fibers with different mode-field diameters.…”

Section: Ref Gain Medium Output Power Pump Power Slope Efficiency Symentioning

confidence: 99%

40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components

2018

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Abstract:In this work, we demonstrate a three-stage all-fiber master oscillator power amplifier (MOPA) system emitting over 40 W of continuous-wave (CW) output power at~1.5 µm. The setup utilizes three self-fabricated high-power passive fiber components: a mode-field adaptor (MFA) and two types of pump and signal power combiners. Their development allowed us to become independent from commercially available components, which are often incompatible with fibers used in the experimental setups, resulting in additional losses. A power combiner with single-mode (SM) signal fibers in a configuration (5 + 1) × 1 was used in the second stage of the MOPA system, which was based on an SM Er-Yb co-doped double-clad (DC) fiber. The fabricated MFA was used to connect the second amplifier stage based on SM fibers with the third amplifier stage based on large-mode-area (LMA) fibers. In the third stage of MOPA system, based on Er-Yb LMA DC fibers, we used the fabricated power combiner based on LMA-type signal fibers in a configuration (6 + 1) × 1. The presented three-stage MOPA system, utilizing self-fabricated high-power passive fiber components, enables amplification of an input signal of 10 mW up to 44 W of the CW power at the wavelengths of 1555 nm and 1563 nm, corresponding to a gain level of approximately 36.4 dB.

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High pumping-power fiber combiner for double-cladding fiber lasers and amplifiers

Cited by 9 publications

References 37 publications

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

Loss mechanism of all-fiber cascaded side pumping combiner

40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components

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