Accession Number : AD0447344


Title :   A COMPUTER APPROACH TO LASER DESIGN,


Descriptive Note : Physical sciences research papers no. 37,


Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA


Personal Author(s) : Purnhagen, T G ; Lubelfeld, J


Report Date : 31 Oct 1963


Pagination or Media Count : 8


Abstract : The problem of maximizing laser efficiency is usually approached through experimental study. The method proposed in this paper permits us to approximate the optimum design prior to the actual physical construction of the system. The efficiency of a four-level laser system is first defined as a product of six subefficiencies, each associated with one of the loss mechanisms operative in the system. Equations which relate the subefficiencies to physically measurable parameters are derived. The set of these equations constitutes the model for system efficiency. Based on the model, a program is written for a specific digital computer. A sample problem involving the design of a neodymium doped glass laser oscillator is solved to illustrate the use of the model. The results are in general agreement with known theoretical and experimental properties of the pulsed fourlevel laser. In general, the efficiency increases with length, radius, doping density and pumping energy, and decreases as end reflectivities and pumping pulse time constant increase, within the restrictions imposed on the model by assumptions and approximations. (Author)


Descriptors :   *LASERS , COMPUTER PROGRAMMING , DIGITAL COMPUTERS , MATHEMATICAL MODELS , PUMPING(ELECTRONICS)


Distribution Statement : APPROVED FOR PUBLIC RELEASE