Optical Amplifiers and Their Applications 1997
DOI: 10.1364/oaa.1997.faw18
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Double-Clad Fiber Laser with 30 W Output Power

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Cited by 34 publications
(21 citation statements)
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“…For efficient absorption of all pump light, we need to scramble the pump modes somehow, especially when working with short fibers for which mode-scrambling would otherwise be negligible. See [23]. In our laser experiments, we did scramble the modes by bending the fiber into a figure-eight.…”
Section: Methodsmentioning
confidence: 99%
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“…For efficient absorption of all pump light, we need to scramble the pump modes somehow, especially when working with short fibers for which mode-scrambling would otherwise be negligible. See [23]. In our laser experiments, we did scramble the modes by bending the fiber into a figure-eight.…”
Section: Methodsmentioning
confidence: 99%
“…If this effect could be eliminated, the 975-nm absorption could be still higher. Noncircular fiber cross-sectional geometries reduce the number of modes with poor overlap with the core [23], [24]. In a noncircular fiber, we believe that the 975-nm pump absorption may exceed 20 dB/m with the same core and a similarly sized inner cladding as in the fiber we used.…”
Section: Methodsmentioning
confidence: 99%
“…6) And cw powers as much as several hundreds watts have been achieved by cladding pump technique in some laboratories. 7,8) A highly-efficient cladding-pumped ytterbium-doped fiber laser generating 1.36 KW of continuous-wave output power at 1.1 μm with 83% slope efficiency and near diffraction-limited beam quality was demonstrated by Y. Jeong. 9) In addition, 74-fs bandwidth-limited pulses with an average power of 0.4 W, pulse energy of 8 nJ, and central wavelength tuning from 1.00 to 1.070 μm were generated by IMRA American.…”
Section: Introductionmentioning
confidence: 99%
“…The optical efficiency of a fiber laser, therefore, critically depends on the coupling of the injected pump light from the pump core to the active core. To date, there are a variety of cladding geometries to improve pump absorption, e.g., circular offset, rectangular, D-shaped, hexagonal, flower, and a circular cladding with an inner D-shaped hole [3]- [8]. D-shaped fiber (DSF) has been widely used in high-power double-clad fiber lasers (DCFL) because of its high pump absorption efficiency and low production cost as compared with rectangular and circular offset core cross-sectional fibers [8].…”
mentioning
confidence: 99%
“…To date, there are a variety of cladding geometries to improve pump absorption, e.g., circular offset, rectangular, D-shaped, hexagonal, flower, and a circular cladding with an inner D-shaped hole [3]- [8]. D-shaped fiber (DSF) has been widely used in high-power double-clad fiber lasers (DCFL) because of its high pump absorption efficiency and low production cost as compared with rectangular and circular offset core cross-sectional fibers [8]. Furthermore, as simulated in [6], the flower-shaped cross-sectional fiber can provide similar pump absorption features to the DSF.…”
mentioning
confidence: 99%