摘要:

The diffracted intensity of light scattered from surface (Rayleigh) waves is calculated by satisfying all boundary conditions to first order in the surface displacements. Comparison with existing experimental data and previous theoretical results is made, and several discrepancies are indicated. More importantly, the relative positions of the Brewster angles for the various diffracted orders appear to the reversed, experimentally, from those predicted in the present treatment.

ISSN:0003-6951    

DOI:10.1063/1.90082

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

It is shown here that experimental results from different laser devices cannot be compared unless proper care is taken of the distributions of the hot spots.

ISSN:0003-6951    

DOI:10.1063/1.90083

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The nonlinear refractive‐index coefficientn2of three beryllium fluoride glasses was measured at 1064 nm using time‐resolved interferometry. The refractive‐index nonlinearity of amorphous BeF2is the smallest reported for any solid. From Raman scattering spectra, the nuclear contributionn2was found to be ≈20–30% of the total, a factor similar to that for oxide glasses.

ISSN:0003-6951    

DOI:10.1063/1.90084

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Ga(1−x)AlxAs‐GaAs double‐heterostructure mesa‐stripe‐geometry lasers that operate continuously at room temperature (23 °C) have been grown by metalorganic chemical vapor deposition (MO‐CVD). Threshold currents as low as 119 mA dc have been measured for devices with a mesa width of 14 &mgr;m and a cavity length of 380 &mgr;m.

ISSN:0003-6951    

DOI:10.1063/1.90085

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

A novel send/receive terminal for multimode fiber bussing has been constructed in an 85‐&mgr;m‐thick LiTaO3plate forming a curved focusing reflector on the plate end. The low‐loss T terminal is an electro‐optic switch that requires no light source of its own. It provides maximum optical throughput in the absence of electrical excitation.

ISSN:0003-6951    

DOI:10.1063/1.90086

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Low‐threshold GaAs‐GaAlAs lasers operating in a stable single mode have been fabricated using laterally diffused junctions. The lasers are fabricated on semi‐insulating substrates and can be integrated with other components.

ISSN:0003-6951    

DOI:10.1063/1.90087

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

It is shown that C2is formed in thea3&pgr;ustate via the ir photodissociation of selected polyatomic molecules in the absence of collisional processes.

ISSN:0003-6951    

DOI:10.1063/1.90067

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Small‐area high‐radiance LED’s fabricated from AlGaAs‐GaAs double‐heterostructure wafers grown by molecular beam epitaxy are reported. Both oxide‐confinement and reverse‐biased junctions were employed to confine the injection current to the small light‐emitting areas. The series resistance of the diodes was reduced by zinc diffusions into and near the active region and both the linearity and the power saturation characteristics were improved. The interfacial recombination rate was determined to be about 6.6×103cm/sec. These results are compared with LED’s made by liquid‐phase epitaxy.

ISSN:0003-6951    

DOI:10.1063/1.90068

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The application of high‐repetition‐rate photoionized TEA laser techniques to continuous wave CO2lasers is described. A PIE discharge approach is shown to provide a simple and convenient method for production of uniform large‐volume high‐density plasmas, suitable for continuous high‐powered CO2laser operation. The approach may be suitable for discharge‐pumped noble‐gas–halide lasers.

ISSN:0003-6951    

DOI:10.1063/1.90069

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

CARS generation from N2has been demonstrated using a crossed‐triple‐beam phase‐matching technique. This approach can provide greater and unambiguous spatial resolution for diagnostic purposes in contrast to the conventionally employed collinear phase‐matching schemes. The technique has been dubbed BOXCARS based upon the shape of the phase‐matching diagram.

ISSN:0003-6951    

DOI:10.1063/1.90070

出版商:AIP    

年代:1978

数据来源: AIP