Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibili...Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibilities of coherent and incoherent stripes are 59% and 6%, respectively. The measured width of the central strip is in good agreement with the calculated result. For in-phase mode, the output power of the phase-locked fiber laser array is up to 113 W and corresponding slope efficiency is 38.5%.展开更多
A home-made double-clad Tm3＋ -doped silica fiber laser with over 150-W output power is reported. Pumped with a diode bar at 793nm, the fiber laser is operated at 2.04μm with a slope efficiency of 56.3%. A quantum ef...A home-made double-clad Tm3＋ -doped silica fiber laser with over 150-W output power is reported. Pumped with a diode bar at 793nm, the fiber laser is operated at 2.04μm with a slope efficiency of 56.3%. A quantum efficiency of 〉 140% is achieved owing to the efficient cross-relaxation process in heavily Tm3＋-doped fibers. By using different fiber-cooling techniques, the slope efficiency shows a deviation over 10%. The influence of output coupling on the laser characteristics is also investigated.展开更多
随着光通信技术的发展,各种现有的单模光纤已不能满足宽带光传输密集波分复用(DWDM)系统传输的要求,S C L三波段传输新型单模光纤是在1460～1625nm的波长范围内具有足够大的色散以抑制四波混频效应、交叉相位调制等非线性效应,又使色散...随着光通信技术的发展,各种现有的单模光纤已不能满足宽带光传输密集波分复用(DWDM)系统传输的要求,S C L三波段传输新型单模光纤是在1460～1625nm的波长范围内具有足够大的色散以抑制四波混频效应、交叉相位调制等非线性效应,又使色散及斜率尽可能低,从而使色散管理成本降到最低的新型单模光纤.我们设计和计算了这种新型的光纤的结构并对其性能参数进行了分析和讨论.展开更多
The comparatively large mode field single-mode photonic crystal fibers （PCFs） were fabricated, the lightwave from 600- to 1600-nm wavelength along this PCF could be transmitted in single mode. The manufacturing proc...The comparatively large mode field single-mode photonic crystal fibers （PCFs） were fabricated, the lightwave from 600- to 1600-nm wavelength along this PCF could be transmitted in single mode. The manufacturing process technologies of the PCFs were exploited, and the drawing parameters of PCFs were also presented. The structure parameters on the single-mode performance of PCFs were theoretically studied, and in practice the design was proved. The measurements of cut-off wavelength and light intensity distri- bution showed that the PCF had comparatively wide single-mode operating wavelength range.展开更多
基金This work was supported by the National Major Fundamental Research Program(973)of China(No.61359020103)the National High Technology Research and Development Program(863)of China(No.2005AA802030).
文摘Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibilities of coherent and incoherent stripes are 59% and 6%, respectively. The measured width of the central strip is in good agreement with the calculated result. For in-phase mode, the output power of the phase-locked fiber laser array is up to 113 W and corresponding slope efficiency is 38.5%.
基金Supported by the National High-Tech Research and Development Program of China under Grant No2009AA03Z441 and the Natural Science Foundation of Shanghai under Contract 10ZR1433700.
文摘A home-made double-clad Tm3＋ -doped silica fiber laser with over 150-W output power is reported. Pumped with a diode bar at 793nm, the fiber laser is operated at 2.04μm with a slope efficiency of 56.3%. A quantum efficiency of 〉 140% is achieved owing to the efficient cross-relaxation process in heavily Tm3＋-doped fibers. By using different fiber-cooling techniques, the slope efficiency shows a deviation over 10%. The influence of output coupling on the laser characteristics is also investigated.
文摘随着光通信技术的发展,各种现有的单模光纤已不能满足宽带光传输密集波分复用(DWDM)系统传输的要求,S C L三波段传输新型单模光纤是在1460～1625nm的波长范围内具有足够大的色散以抑制四波混频效应、交叉相位调制等非线性效应,又使色散及斜率尽可能低,从而使色散管理成本降到最低的新型单模光纤.我们设计和计算了这种新型的光纤的结构并对其性能参数进行了分析和讨论.
基金This work was supported by the National "973" Plan under Grant No.2003CB314905.
文摘The comparatively large mode field single-mode photonic crystal fibers （PCFs） were fabricated, the lightwave from 600- to 1600-nm wavelength along this PCF could be transmitted in single mode. The manufacturing process technologies of the PCFs were exploited, and the drawing parameters of PCFs were also presented. The structure parameters on the single-mode performance of PCFs were theoretically studied, and in practice the design was proved. The measurements of cut-off wavelength and light intensity distri- bution showed that the PCF had comparatively wide single-mode operating wavelength range.
