摘要:

Continuous parametric amplification of signals near 10.6 &mgr; has been obtained. Amplification is caused by interaction with a strong pumping beam in sulfur hexafluoride gas, a saturable absorber. Nonlinear polarization of individual SF6molecules is considered to be responsible.

ISSN:0003-6951    

DOI:10.1063/1.1652795

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

Measurements of the nonlinear interaction in SF6of two linearly polarized CO2laser signals as a function of the angle between the two planes of polarization have been made. The angular dependence of the interaction suggests that several SF6vibrational‐rotational transitions are responsible for 10.6‐&mgr; absorption.

ISSN:0003-6951    

DOI:10.1063/1.1652796

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

The electron energy distribution function has been calculated for the plasma of a CO2&sngbnd;N2&sngbnd;He mixture using available electron—molecule cross‐section data. Rates at which electrons transfer energy to the inelastic levels of CO2and N2were then determined. With this information, the relationship of the various electron—molecule energy exchange processes to laser performance was studied. For conditions typical of CO2lasers, approximately 17% of the power transferred to the CO2and N2was found to be available for conversion to optical power. Estimates of maximum available optical power were made and found to be consistent with experimental values.

ISSN:0003-6951    

DOI:10.1063/1.1652797

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

A technique is described for limiting the axial propagation of the absorption zone in laser‐induced gas breakdown. A theoretical model suggests that the resulting localized energy deposition should allow heating of the plasma to temperatures comparable with those obtained when a focused laser beam heats small particles in vacuum. Preliminary experimental results confirm the localization of the absorption zone.

ISSN:0003-6951    

DOI:10.1063/1.1652798

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

We report noncollinear single‐cavity optical parametric oscillation with energy conversion of 45% using LiNbO3pumped with a ruby laser. A new method of tuning is employed. Partial compensation for Poynting vector walk off is provided.

ISSN:0003-6951    

DOI:10.1063/1.1652799

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

An oscillatory magneto‐current has been observed in forward biasedp‐njunctions of silicon and germanium, at both liquid nitrogen and room temperatures.

ISSN:0003-6951    

DOI:10.1063/1.1652800

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

The influence of grain, subgrain, or dislocation cell sizedor superconducting critical flux gradientdB/drwas investigated in a single phase Nb‐33 at. % Zr alloy. By appropriate heat treatments,dwas varied from 0.25 to 1500 &mgr;. A monotonic decrease of more than one hundred‐fold indB/draccompanied this thousand‐fold increase ind. At a givend, the maximum increase indB/drobtained from precipitation of a second phase does not exceed a factor of about 30.

ISSN:0003-6951    

DOI:10.1063/1.1652801

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

The rf magnetic susceptibility of three iron‐nickel alloys has been observed to change about one part in 104due to space charge induced at a blocking contact.

ISSN:0003-6951    

DOI:10.1063/1.1652802

出版商:AIP    

年代:1969

数据来源: AIP