Aluminum samples have been analyzed by femtosecond polarization-resolved laser-induced breakdown spectroscopy （fs-PRLIBS）. We compare the obtained spectra with those obtained from nanosecond PRLIBS （ns-PRLIBS）. Th...Aluminum samples have been analyzed by femtosecond polarization-resolved laser-induced breakdown spectroscopy （fs-PRLIBS）. We compare the obtained spectra with those obtained from nanosecond PRLIBS （ns-PRLIBS）. The main specific features of fs-PRLIBS are that a lower plasma temperature leads to a low level of continuum and no species are detected from the ambient gas. Furthermore, signals obtained by fs-PRLIBS show a higher stability than those of ns-PRLIBS. However, more elements are detected in the ns-PRLIBS spectra.展开更多
It is shown that the continuum emission produced by an A1 alloy ablated by femtosecond laser pulses is much more polarized than the characteristic lines of elements. A Glan-Thomson polarizer is used in the laser-induc...It is shown that the continuum emission produced by an A1 alloy ablated by femtosecond laser pulses is much more polarized than the characteristic lines of elements. A Glan-Thomson polarizer is used in the laser-induced breakdown spectroscopy experiment to investigate the polarization effect. The use of the polarizer at its minimal transmission increases the signal-to-noise ratio. The effects of angle of detection, focal position, and pulse energy on the signal-to- noise ratio are also studied.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11211120156, 11274053, 11074027, 61178022, and 60978014)the Science and Technology Department of Jilin Province, China (Grant Nos. 20100521, 20100168, and 20111812)the SRF for ROCS, SEM
文摘Aluminum samples have been analyzed by femtosecond polarization-resolved laser-induced breakdown spectroscopy （fs-PRLIBS）. We compare the obtained spectra with those obtained from nanosecond PRLIBS （ns-PRLIBS）. The main specific features of fs-PRLIBS are that a lower plasma temperature leads to a low level of continuum and no species are detected from the ambient gas. Furthermore, signals obtained by fs-PRLIBS show a higher stability than those of ns-PRLIBS. However, more elements are detected in the ns-PRLIBS spectra.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 60978014, 11074027, and 61178022)the Funds from Jilin Provincial Science and Technology Department, China (Grant Nos. 20100521, 20100168, and 20111812)+1 种基金the Science and Technology Division of Changchun City, China (Grant No. 09GH01)the Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry, China
文摘It is shown that the continuum emission produced by an A1 alloy ablated by femtosecond laser pulses is much more polarized than the characteristic lines of elements. A Glan-Thomson polarizer is used in the laser-induced breakdown spectroscopy experiment to investigate the polarization effect. The use of the polarizer at its minimal transmission increases the signal-to-noise ratio. The effects of angle of detection, focal position, and pulse energy on the signal-to- noise ratio are also studied.
