摘要:

A LiNbO3optical parametric oscillator has been temperature tuned over the wavelength range of 7300 A˚ to 19,300 A˚. Total output powers of the order of 103W were observed with pump powers at 5300 A˚ of about 105W. Experimental data illustrate the pronounced dependence of the generated frequencies on the pump frequency and the longitudinal mode distribution of the resonator. A proposal is described for quasicontinuous tuning of the output frequencies by means of the linear electro‐optic effect in the oscillator crystal.

ISSN:0003-6951    

DOI:10.1063/1.1754758

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

By taking the negative mobility slope of a three‐slope piecewise‐linear model for velocity vs electric field inn‐GaAs as an adjustable parameter, good quantitative agreement has been obtained with the measured small‐signal admittance parameters of GaAs negative conductance amplifiers. The calculation yields a negative mobility of about 2500–3000 cm2/V‐sec.

ISSN:0003-6951    

DOI:10.1063/1.1754759

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

A method is described by which particularly good copies of holograms can be made. The reconstructed images formed by copies made when a He&sngbnd;Ne laser is used as the illuminating light for the copying process are excellent in detail and are less degraded than when other conventional illuminating light source is used.

ISSN:0003-6951    

DOI:10.1063/1.1754760

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

Photovoltaic response has been observed inp‐njunctions of PbxSn1−xTe at wavelengths up to 9.5 &mgr; at 77°K and up to 12 &mgr; at 12°K. These results together with previous photoluminescence data and the proposed model for the band structure of PbxSn1−xTe (ref. 1) indicate that these alloys have considerable potential for efficient infrared detection throughout the 8 to 14 &mgr; atmospheric window and well beyond.

ISSN:0003-6951    

DOI:10.1063/1.1754761

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

The operation and characteristics of liquid lasers with a purely organic medium are described. A giant‐pulse ruby laser is used to pump solutions of organic dyes in various organic solvents in concentrations ranging from 10−3to 10−6moles/liter. The solutions are contained in plane‐parallel cuvettes acting as laser cavities. Wavelengths from 730 to 870 nm, megawatt peak powers and beam divergence angles of 5 mrad have been observed. The laser wavelength of each dye is tunable over a great part of its fluorescence band, e.g. by a change in concentration.

ISSN:0003-6951    

DOI:10.1063/1.1754762

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

A H2‐Stokes Raman oscillator was constructed operating at 9755 A˚, and its performance was found to be as expected of laser oscillators. No beam instability was developed (beam trapping), confirming earlier measurements. A significant beam brightness enhancement (in terms of line width and beam divergence) over that of theQ‐switched ruby laser resulted.

ISSN:0003-6951    

DOI:10.1063/1.1754763

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

Experimental results are reported on a continuously‐variable delay line using acoustic waves to diffract and frequency‐shift a portion of an argon ion laser beam. Data was obtained from 300 to 700 MHz utilizing thin‐film CdS transducers deposited on a single‐crystal Z‐cut quartz rod placed within the laser cavity. The diffracted, frequency‐shifted beam was optically heterodyned on a PIN detector. Variable delays of the order of 10 &mgr;sec were obtained by varying the distance from the CdS transducer to the beams' intercept point. A novel folded‐acoustic path configuration is also described.

ISSN:0003-6951    

DOI:10.1063/1.1754764

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

MOS‐capacitance measurements combined with neutron activation analysis show that positive charge at oxidized silicon surfaces can be increased by the presence of sodium in the oxidation system. The amount of charge depends then on the surface orientation and the oxide thickness. It can be decreased by low‐temperature heat treatment in water vapor or hydrogen. The same treatment can cause an effective reduction of the number of interface states. In both cases an explanation can be found in the formation of Si&sngbnd;H bonds.

ISSN:0003-6951    

DOI:10.1063/1.1754765

出版商:AIP    

年代:1966

数据来源: AIP

摘要:

A simple method of separating the opposing photocurrent components which occur in thin‐film, metal‐insulator‐metal sandwich structures at low (or zero) applied bias voltages is presented. The method uses data obtained by illuminating the sample first from one side and then from the other, both electrodes being semitransparent, and calculating the ratio of the resulting photo‐yields over a suitable photon energy range. The analysis has been applied to evaporated Al‐Al3O3‐Al diodes in which the Al2O3layer was formed by evaporation of sapphire. The experimental results show that the proposed analysis is adequate for its intended purpose.

ISSN:0003-6951    

DOI:10.1063/1.1754766

出版商:AIP    

年代:1966

数据来源: AIP

ISSN:0003-6951    

DOI:10.1063/1.1754767

出版商:AIP    

年代:1966

数据来源: AIP