forc 小输出功率20mwedfa 包括小输出功率20mw的edfa，包括1520-1600的掺鉺超宽带光源，包括1.0,1.5.2.0的光纤激光器，包括1336nm的超荧光光源，1441nm的超荧光光源，包括检测折射率的仪器 based on innovative technology of yb-free double-clad er-doped fibe, the dc_edfa35/125 offe unprecedentedly high level of nonlinearity threshold (typical paramete of gain fiber: mfd~25μm, length ~6 m). with the demotrated pulse energy of >1mj in 100 pulse and > 600 nj in sub-ps pulse (after compression from 60 ps pulses), the dc_edfa35/125 makes 1.5 micron laser sources competitive with yb-doped fiber lase in terms of peak power. in the standard configuration and with 40-w pump power @ 976nm, the dc_edfa35/125 allows one to extract more than 5-w average power in the range of 1550-1600 nm with diffraction limited beam quality. higher output power and efficiency up to 40% are available upon