摘要:

A comparison of two theories used to analyze distributed feedback lasers and periodic optical devices finds them, contrary to some claims, to be formally equivalent.

ISSN:0003-6951    

DOI:10.1063/1.88247

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

Real‐time compensation for thermally induced beam distortion has been demonstrated using a phase‐adaptive aperture subdivided into 18 elements coupled with an 18‐channel multidither servo system. The results were obtained using an argon ion laser and a nonlinear liquid cell placed in the near field of the transmitted beam. The system increased the peak beam irradiance by more than a factor of 4 at the highest power used and reduced the beamwidth by a factor of 5.4 from the uncorrected bloomed case. A comparison with predictions from existing theory is given.

ISSN:0003-6951    

DOI:10.1063/1.88248

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

A method of analysis of oxygen, nitrogen, and carbon in thin samples involves the detection of charged particles from nuclear reactions induced by a 7‐MeV lithium‐6 beam. The particle detection with a telescope counter near 0° takes full advantage of high exothermic reactions. The sensitivity is of the order of 10−3&mgr;g/cm2. A preliminary study of the contaminants introduced during the sputtering of niobium is presented.

ISSN:0003-6951    

DOI:10.1063/1.88249

出版商:AIP    

年代:1975

数据来源: AIP