IEEE Journal of Quantum Electronics

A continuous glow discharge was applied to a Cu/CuCl double pulse laser. Maximum laser pulse energy was observed to increase as much as 35 percent at low buffer gas pressure and 3.5 percent at optimum buffer gas pressure. Minimum and optimum time delays decreased with increasing glow discharge current. The greater pulse energy may be due to increased rate of current rise of the pumping discharge p... View full abstract»

Single-photon pumping of molecular gases at low pressures does not typically yield laser transitions in the hot bands of the molecule. Thus many possible laser transitions of interest in the molecules are inaccessible under these conditions. In this letter four new hot-band laser transitions (25.47, 25.88, 26.44, 49.04 mum) in NH3are reported with single-photon pumping and pr... View full abstract»

By reducing the 24 visible laser lines of a HeSe+ laser (1 m length, 2 mm bore) to the lines 460.4, 517.6, and 649.0 nm with a special 3 color resonator, a white laser beam with 3 mW CW output is realized. Proper engineering of the HeSe+ laser reduces noise to 1 percent rms and extends lifetime to more than 1000 h. View full abstract»

PassiveQ-switching of the10P(32)line of a CO2laser was obtained using methyl iodide as the saturable absorber. The pulse peak power is about 22 times higher than the CW output power. Pulse lengths of1-2 mus and repetition rates of 10⁴-10⁵s^-1were observed at pressures between 0.029 and 0.21 mbar. View full abstract»

This paper reports frequency instability measurements made on two optically pumped CH3OH waveguide lasers working at 4.25 THz (70.5 μm) and at 2.52 THz (118 μm). The two-sample standard deviationsigma_{y}(tau)is measured on the beat note generated by a point contact metal-insulator-metal diode. A fractional value of about2 cdot 10^{-12}and4 cdot 10^{... View full abstract»

We report the first experimental determination of the gain spectrum of a laser-pumped submillimeter laser amplifier. Single-mode pump and submillimeter oscillators were used to determine the gain as a function of submillimeter laser frequency, pump intensity, relative polarization, and molecular gas pressure. The 385 μm transition in D2O and the 496 μm transition in CH3 View full abstract»

Amplified spontaneous emission of laser media having a spherical or disk shape is numerically analyzed. Some properties are discussed and a comparison with linear systems is made. Analytical approximations, for the case of high pumping rates and high efficiency, are obtained. Energy level schemes of dye systems are used in the analysis and in the numerical calculations. A coupled set of radiative ... View full abstract»

A new stoichiometric compound of Nd, K5NdLi2F10has been synthesized and its spectroscopic and lasing properties are reported. The material is characterized by a room temperature decay time of 300 μs, increasing to 500 μs in diluted samples. This represents the least amount of concentration quenching reported in this class of compounds. The spectroscopical... View full abstract»

Experimental and analytic studies of coupled multiple stripe (CMS) phase-locked, room-temperature diode lasers are reported. Such devices generate high-power well-collimated beams, which potentially may be electronically scanned in the manner of phased array radar. For the tested devices with ten conducting 3 μm stripe contacts on centers separated byDand coupled by curved waveguid... View full abstract»