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    • 3. 发明申请
    • PULSED FIBER LASER WITH DOUBLE- PASS PUMPING
    • 脉冲激光与双重抽吸
    • WO2013098620A1
    • 2013-07-04
    • PCT/IB2012/002748
    • 2012-12-19
    • DATALOGIC AUTOMATION S.R.L.
    • TAGLIAFERRI, MarcoCANNONE, FabioNOLLI, Daniela
    • H01S3/067H01S3/117H01S3/102H01S3/094H01S3/113H01S3/16
    • H01S3/0675H01S3/094007H01S3/094015H01S3/094076H01S3/094084H01S3/09415H01S3/1024H01S3/113H01S3/117H01S3/1618
    • A pulsed fiber laser oscillator comprising in succession: a pumping source (10) for providing pumping energy at a first wavelength to a multimode optical fiber; a first Bragg grating optical filter (11 ) reflecting a second wavelength and transparent to said first wavelength; an active optical fiber (20) having a predefined wavelength which emits radiation at said second wavelength; a switch (14) arranged to periodically interrupt said second wavelength to provide a pulsed laser beam; and a second Bragg grating optical filter (15) partially reflecting said second wavelength; characterized by comprising, following said active optical fiber (20), a reflector (21 ) of said first wavelength, such that said pumping energy undergoes two passages within said active optical fiber (20); said predefined wavelength being determined such that the absorption of said pumping energy at said first wavelength within said active optical fiber (20) is greater than 80% after undergoing said two passages.
    • 一种脉冲光纤激光振荡器,包括:泵送源(10),用于将第一波长的泵浦能量提供给多模光纤; 反射第二波长并对所述第一波长透明的第一布拉格光栅滤光器(11); 具有预定波长的有源光纤(20),其发射所述第二波长的辐射; 布置成周期性地中断所述第二波长以提供脉冲激光束的开关(14); 和部分地反射所述第二波长的第二布拉格光栅滤光器(15); 其特征在于,在所述有源光纤(20)之后包括所述第一波长的反射器(21),使得所述泵浦能量在所述有源光纤(20)内经过两个通道; 所述预定波长被确定为使得在进行所述两个通道之后,在所述有源光纤(20)内的所述第一波长处的所述泵浦能量的吸收大于80%。