Kinetics of saturation of the active medium of an oxygen-iodine laser

Загидуллин, М. В.; Igoshin, Valerii I; Kupriyanov, N L

doi:10.1070/qe1984v014n07abeh005279

Cited by 16 publications

(5 citation statements)

References 2 publications

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“…For the first excited state of iodine a different approach was used to estimate the requireddiffusioncoefficients since experimental data, summarized in Table 3, for the spatial diffusion of I atoms in the rare gases at 300 K and 1 atmosphere pressure is available (Refs. 15 (14) and (17), are summarized in Table 2.…”

Section: Velocity Diffusion Coefficients For I In He and 02 Mixturesmentioning

confidence: 99%

“…Finite-rate hyperfine relaxation does not, to first order, decrease the SSG, but does reduce the saturation parameter since the effective lifetime of the upper laser level is increased (Ref. 15). As is well-known a realistic gas laser model must account for the thermal motion of the lasing atoms as well as their collisions to properly treat the medium's saturation behavior.…”

Section: Introductionmentioning

confidence: 98%

“…The resonator configuration was identical to that used by Bullock and Yun (Ref 34). in their study of adjoint-coupled iodine lasers except that its length was taken to be 10 m so that the mode separation,15 MHz, was comparable to the collision linewidth, 14.4 MHz (FWHM), for the present medium conditions. The Doppler linewidth in MHz is given approximately by l4.49T112 which is 168 MHz (FWHM) at 135 K.…”

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confidence: 99%

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Effect of velocity cross-relaxation and mode separation upon the power spectrum of a chemical oxygen-iodine laser resonator

Copeland

1990

SPIE Proceedings

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A gain model for optical extraction from the CW chemical oxygen-iodine laser medium is described. It uses a simplified, temperature-dependent, chemical kinetics package which consists of several reactions between molecular oxygen, atomic and molecular iodine, water, and helium. The Heidner 12 dissociation mechanism is included to allow for incomplete dissociation. Gas flow is treated using a pre-mixed, onedimensional streamtube model which accounts for gas expansion and heat release in the cavity. Collisional cross-relaxation effects upon the Doppler-broadened line are treated using a Fokker-Planck diffusion model of the velocity distribution of the upper and lower laser levels. This model, in conjunction with a geometric optics, multi-mode model of an unstable standing-wave confocal resonator, is used to examine the influence of incomplete velocity cross-relaxation and longitudinal mode separation upon the output power and mode spectrum of the laser. It is shown that lasing will occur on all available modes even when the mode separation is less than the collision linewidth.

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Section: Velocity Diffusion Coefficients For I In He and 02 Mixturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

mentioning

confidence: 99%

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Effect of velocity cross-relaxation and mode separation upon the power spectrum of a chemical oxygen-iodine laser resonator

Copeland

1990

SPIE Proceedings

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“…Zagidullin et al 4 presented a model that takes into account both homogeneous and inhomogeneous broadening as well as velocity cross relaxation and a hyperfine relaxation process that can solve the abovedescribed problems, but this model is quite complex and was not widely used. The most widely used theoretical model is still the rate-equation ͑RE͒ model, or its low-pressure limit in COIL.…”

Section: Introductionmentioning

confidence: 99%

Performance Analyses of Flowing Chemical Oxygen-Iodine Laser

Zhi

2003

Appl. Opt.

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A modified simplified rate-equation model that utilizes the Voigt profile function and another gain saturation model deduced from the kinetic equations are presented for performance analyses of a flowing chemical oxygen-iodine laser. Both models are adapted to both the condition of homogeneous broadening and that of inhomogeneous broadening being of importance and the condition of inhomogeneous broadening being predominant. Effects of temperature and iodine density on the output power and on variations of output power, optical intensity, and saturation intensity with flow distance are presented as well. There are differences between results of two models, but both qualitatively agree with known results.

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“…The maximum stimulated emission cross-section can at a very low pressure for the strongest transition 3 → 4 be estimated as 2 [84Zag,86Zag,95Car] σ 3→4 (max) = 7 12 …”

Section: Laser Transition Cross-sectionmentioning

confidence: 99%

3.7 Iodine lasers

Rohlena

Beránek

Laser Systems, Part 1

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Kinetics of saturation of the active medium of an oxygen-iodine laser

Cited by 16 publications

References 2 publications

Effect of velocity cross-relaxation and mode separation upon the power spectrum of a chemical oxygen-iodine laser resonator

Effect of velocity cross-relaxation and mode separation upon the power spectrum of a chemical oxygen-iodine laser resonator

Performance Analyses of Flowing Chemical Oxygen-Iodine Laser

3.7 Iodine lasers

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