摘要:

A simple technique for observing picosecond light pulses is demonstrated. The overlap between two light beams is measured by two‐photon excitation of a photographic film which is below threshold for one‐photon excitation. The resolution of the method is variable and limited only by the bandwidth of the photographic film.

ISSN:0003-6951    

DOI:10.1063/1.1652499

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

The position of the (1, 0, 0) minima in InP are determined from measurements in the region of interconduction band absorption. Direct transition electroluminescence in the In1−xGaxP alloys is observed over a range of alloys up tox= 0.8 and photon energies of up to 2.2 eV at 300°K and is consistent with the bandstructure determined for InP and that of GaP.

ISSN:0003-6951    

DOI:10.1063/1.1652500

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Although gas lasers generally operate in the weak mode‐coupling regime, one may induce strong coupling, hence single‐moding, by means of a saturable absorbing medium placed within the resonator. The effect occurs under conditions where, although the linear gain of the amplifier cell may exceed the linear loss of the absorption cell, the absorber may saturate more heavily than the amplifier. The analysis, based on the coupled energy‐balance equations, indicates that the power in the surviving mode may be considerably enhanced.

ISSN:0003-6951    

DOI:10.1063/1.1652501

出版商:AIP    

年代:1968

数据来源: AIP