The output of amplified spontaneous emission lasers
摘要:
The output of amplified spontaneous emission (ASE) lasers such as X-ray lasers operated without mirrors is calculated exactly for Gaussian and Lorentzian small signal gain profiles by a simple Taylor series expansion. The accuracy of the 'Linford' formula commonly used as an approximation for the output of ASE lasers is evaluated by comparison to our exact solutions. The Linford formula is accurate to better than 10% for intensities produced by a Gaussian gain profile, but requires multiplication by a correction factor of at gain length product greater than 5 for Lorentzian gain profiles. (c) 2006 Elsevier Ltd. All rights reserved.
The output of amplified spontaneous emission lasers
作者:H. Huang、G.J. Tallents
DOI:10.1016/j.jqsrt.2006.02.064
日期:2006.12
The output of amplified spontaneous emission (ASE) lasers such as X-ray lasers operated without mirrors is calculated exactly for Gaussian and Lorentzian small signal gain profiles by a simple Taylor series expansion. The accuracy of the 'Linford' formula commonly used as an approximation for the output of ASE lasers is evaluated by comparison to our exact solutions. The Linford formula is accurate to better than 10% for intensities produced by a Gaussian gain profile, but requires multiplication by a correction factor of at gain length product greater than 5 for Lorentzian gain profiles. (c) 2006 Elsevier Ltd. All rights reserved.
Organolithium-mediated conversion of β-functionalised aziridines into alkynyl amino alcohols and diamines
作者:Jianhui Huang、Peter O'Brien
DOI:10.1039/b510920e
日期:——
The direct conversion of dihydrofuran and dihydropyrrole N-triisopropylbenzenesulfonyl aziridines into alkynyl amino alcohols and diamines respectively can be achieved using 3 equiv. sec-butyllithiumâPMDETA in THF; use of n-butyllithium and (â)-sparteine in Et2O gave an alkynyl amino alcohol in 60% ee.