23,312 research outputs found
Transient stimulated brillouin scattering reflectivity in CS2 and SF6 under multipulse employment
No full textThe multipulse effects on transient stimulated Brillouin scattering (SBS) in CS2 and 20-atm SF6 were investigated using an iodine laser as the pumping source. A simple pulse-dividing scheme was used to obtain a multipulse. The enhancement of SBS reflectivity by multipulse employment was more significant in SF6 because of a longer phonon lifetime requiring more pumping pulses than in CS2. In practice, when the power ratio of two pumps was 1:1.6 and the pump separation was 8 ns, for CS2 the SBS peak-power reflectivity increased twofold in comparison with that of an original single pump, and the absolute reflected power increased simultaneously by approximately 50%. A computer simulation of the double-pulse pumped SBS process was pei formed to examine the detailed interaction between optical waves and acoustic waves in the medium. With the enhancement of acoustic-wave intensity by double-pulse pumping and the dependence on phonon lifetime we can provide a good explanation of our experimental results. (C) 1997 Optical Society of America
Celebration of the seventieth birthday of Li Hung-Chang, grand secretary, viceroy of Chihli, imperial commissioner for northern trade &c., &c., &c., at Tientsin, February, 1892
No full textTientsin: Tientsin Press, 1892. 33 p : plate, fold. map. Added author: Hung-Chang, Li. Persistent link to this record: https://encore.qub.ac.uk/iii/encore_qub/record/C__Rb115636
EFFECTS OF DECISION AMBIGUITY LEVEL ON OPTICAL RECEIVER SENSITIVITY
No full textWe describe the effect of a finite-decision ambiguity level on optical receiver sensitivity. A new analytic expression for the receiver sensitivity including the effect of the decision ambiguity level is obtained by modifying the well-known expression assuming an ideal decision circuit. Also obtained is a requirement for linear channel transimpedance gain or decision ambiguity level for less than 1-dB power penalty of receiver sensitivity
Ms. Courtney Chartier, RWWL AUC, August 2011
No full textThis video is a conversation with Ms. Courtney Chartier. Ms. Chartier talks about her work on the "New Georgia Encyclopedia" and "Online Voter Education Project." Andrea Jackson, AUC Woodruff Library, is the interviewer
Ms. Neely Terrell, RWWL AUC, March 2012
No full textThis video is a conversation with Ms. Neely Terrell. Ms. Terrell talks about her book, "Super Singles Activate". Anthony Kinsey and Jahnesta Horney, AUC Woodruff Library, are the interviewers
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