All-fiber signal combiner is a key component for augmenting the fiber laser power. Presently the reported 7 x 1 signal combiners are all have output fibers with core diameters larger than 100μm. In order to improve t...All-fiber signal combiner is a key component for augmenting the fiber laser power. Presently the reported 7 x 1 signal combiners are all have output fibers with core diameters larger than 100μm. In order to improve the beam quality of the combiner, a fiber with smaller core of 50 μm diameter is chose to be the output fiber. An all-fiber 7 ×1 signal combiner is fabricated with measured power transmission efficiency around 99% for each port. The beam quality is improved and the measured M2 are around 6 which are matched well with the theoretically calculated results.展开更多
We report the fabrication of cascaded photonic crystal fiber （PCF） tapers in monolithic design. Flat broadband supercontinuum （SC） generation in cascaded PCF tapers pumped by sub-nanosecond pulses from a 1 064-nm ...We report the fabrication of cascaded photonic crystal fiber （PCF） tapers in monolithic design. Flat broadband supercontinuum （SC） generation in cascaded PCF tapers pumped by sub-nanosecond pulses from a 1 064-nm microchip laser is demonstrated. The spectral width （20 dB） extends from 0.47 to 1.67 μm. In the optimal configuration, an ultraflat （3 dB） spectrum from 500 to 1 000 nm is achieved.展开更多
基金supported by the National Natural Science Foundation of China(No.61370045)the Hunan Provincial Natural Science Foundation of China(No.12JJ4061)
文摘All-fiber signal combiner is a key component for augmenting the fiber laser power. Presently the reported 7 x 1 signal combiners are all have output fibers with core diameters larger than 100μm. In order to improve the beam quality of the combiner, a fiber with smaller core of 50 μm diameter is chose to be the output fiber. An all-fiber 7 ×1 signal combiner is fabricated with measured power transmission efficiency around 99% for each port. The beam quality is improved and the measured M2 are around 6 which are matched well with the theoretically calculated results.
基金supported by the State Key Program of National Natural Science Foundation of China (No.61235008)the National Natural Science Foundation of China (Nos. 61077076, 61007037, and 11004247)+1 种基金the Hunan Provincial Natural Science Foundation of China (No.12JJ4061)the International Science & Technology Cooperation Program of China (No. 2012DFG11470)
文摘We report the fabrication of cascaded photonic crystal fiber （PCF） tapers in monolithic design. Flat broadband supercontinuum （SC） generation in cascaded PCF tapers pumped by sub-nanosecond pulses from a 1 064-nm microchip laser is demonstrated. The spectral width （20 dB） extends from 0.47 to 1.67 μm. In the optimal configuration, an ultraflat （3 dB） spectrum from 500 to 1 000 nm is achieved.
