摘要:

The output energy of 0.75 J has been obtained with a pulse width of 40 ns and an efficiency of 0.8% by using a uv‐preionized KrF amplification system. The stored energy in an amplifier has been improved by a factor of about 1.6 by control of self‐breakdown voltage with a change of electrode separation. The measured saturation energy for this device was 51 mJ/cm2corresponding to a KrF saturation intensity of 1.2 MW/cm2. The small‐signal gain coefficient reached 4.3%/cm at a charging voltage of 35 kV.

ISSN:0003-6951    

DOI:10.1063/1.90284

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Gas laser action using a current and space‐charge‐neutralized proton beam as a pump source has been demonstrated. Stimulated emission at 357.7 and 380.5 nm, corresponding to thev′=0→v″=1 andv′=0→v″=2 transitions of the N2(C→B) band, has been observed in Ar/5%N2gas mixtures. In comparison with electron beams, protons appear to be more efficient for excitation sources of high‐pressure uv and visible lasers.

ISSN:0003-6951    

DOI:10.1063/1.90285

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

A copper laser utilizing copper bromide as a lasant and neon as the buffer gas has been operated at an average laser power of between 16 and 19.5 W for a period of 68 h. Lasing was attained at a pulsing rate of 16.7 kHz in a quartz discharge tube 2.5 cm in diameter with an electrode separation of 200 cm. The laser energy/pulse and peak power/pulse corresponding to an average power of 19.5 W are 1.2 mJ and 30 kW, respectively. The ratio of laser power at 510.6 and 578.2 nm varied from 3.9 to 1.1 corresponding to a total average laser power of 4 and 18 W, respectively. The highest wall plug and capacitor efficiency measured during 68 h of operation was 0.7 and 1.1%, respectively.

ISSN:0003-6951    

DOI:10.1063/1.90286

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

A kinetics scheme is described for electron‐beam excitation of the XeF laser in a neon diluent. Both Ne+and Ne* channels contribute significantly to the formation of the upper laser level. In each chain an important Penning ionization process leads to the formation of Xe+, which is the major intermediary in forming the upper laser level. Xe+2is found to be the dominant absorber of laser radiation. The effect of the weakly bound XeF ground state is discussed.

ISSN:0003-6951    

DOI:10.1063/1.90287

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

We have made heterodyne radiometric measurements with GaAs Schottky diode mixers, mounted in a corner‐reflector configuration, over the spectral range 170 &mgr;m to 1 mm. At 400 &mgr;m, system noise temperatures of 9700 K DSB (NEP=1.4×10−19W/Hz) and mixer noise temperatures of 5900 K have been achieved. This same quasioptical mixer has also been used to generate 10−7W of tunable radiation suitable for spectroscopic applications.

ISSN:0003-6951    

DOI:10.1063/1.90288

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The gain spectrum of a pulsed submillimeter (SMM) laser amplifier has been determined for the first time using single‐mode pump and submillimeter laser oscillators. The gain of a 385‐&mgr;m D2O laser amplifier was measured as a function of CO2laser pump power, D2O laser oscillator power, polarization, and D2O gas pressure. The use of single‐mode lasers permits a direct comparison with theory. Comparison with a theory which takes into account two‐photon contributions to the gain yields good qualitative agreement, in that theory accurately predicts the shape of the gain spectrum, including ac Stark effects and the dependence of the gain on polarization, but not the absolute magnitude of the gain.

ISSN:0003-6951    

DOI:10.1063/1.90289

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Lasers on the (B‐X) transitions in HgCl, HgBr, and HgI at 558, 502, and 443 nm, respectively, have been excited in a uv‐preionized transverse electric discharge. Marked increases in laser efficiency and output power were obtained when nitrogen was added to the laser discharge.

ISSN:0003-6951    

DOI:10.1063/1.90290

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

We report the generation of subpicosecond light pulses in a cw mode‐locked Oxazine 750 dye laser, utilizing combined synchronous pumpingandsaturable dye absorption effects. The latter were realized by either fractional cavity length configurations or composite gain‐absorber media, which allowed stable operation in the tuning range 750–835 nm.

ISSN:0003-6951    

DOI:10.1063/1.90291

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

An integrated optical filter composed of coupled nonidentical strip waveguides in LiNbO3is demonstrated. The device has a 200‐A˚ bandwidth, is tunable over several hundred angstroms, and offers electrical control of the crossover efficiency.

ISSN:0003-6951    

DOI:10.1063/1.90292

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The mode‐locked near‐uv output from a krypton ion laser is characterized and shown to produce near‐transform‐limited picosecond pulses. Applications to time‐resolved fluoresence studies for chemical analysis are included.

ISSN:0003-6951    

DOI:10.1063/1.90293

出版商:AIP    

年代:1978

数据来源: AIP