A laser-aided technique has been used for measuring time-resolved optical transmissions of xenon flash lamps at numerous visible and infrared wavelengths, flash-lamp current densities, lamp diameters, pulse durations, and xenon pressures. Long-pulse (~ 600-μs) and short-pulse (~ 10-μs) cases specific for optically pumping solid-state, dye, and atomic iodine lasers were studied. Opacity measurements were made for flash-lamp current densities up to 30 kA/cm2. Flash lamps having fused silica envelope diameters between 0.8 and 4.5 cm and xenon pressures between 2 and 450 Torr were investigated in these experiments. Xenon temperatures between 6000 and 25,000 K were estimated from the frequencies of observed arc-acoustic oscillations. Important applications for increasing the pumping efficiencies of large Nd:glass and photolytic iodine laser amplifiers are discussed.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Transmission–Absorption Coefficients of Long-Pulse Xenon Flash Lampsa
No.
Wavelength (μm)
Laser Source
Lamp Transmission T
Absorption Coefficient (cm−1)
1
3.391
Ne I
0.012 ± 0.008
3.38 ± 0.8
2
1.152
Ne I
0.089 ± 0.06
2.41 ± 0.2
3
1.064
Nd+3
0.21 ± 0.03
2.00 ± 0.11
4
0.647
Kr II
0.150 + 0.14
1.46 ± 0.07
5
0.633
Ne I
0.195 ± 0.018
1.26 ± 0.07
6
0.568
Kr II
0.279 ± 0.012
0.98 ± 0.03
7
0.488
Ar II
0.269 ± 0.015
1.01 ± 0.04
8
0.482
Kr II
0.299 ± 0.004
0.93 ± 0.01
9
0.476
Kr II
0.334 ± 0.005
0.84 ± 0.01
Measurements were made at j = 2.54 kA/cm2, 1.5-cm-bore flash lamp with cerium-doped fused silica walls, 450-Torr xenon pressure, and circuit time constant 600 μs.
Measurements were made at current density of 10.8 kA/cm2 with a 1.8-cm-bore flash lamp, Suprasil walls, 30-Torr xenon pressure, and circuit time constant 10 μs.
Mean 0.094 ± 0.018 cm/kA. The mean value of g including the long-pulse results in Table 2 is 0.112 ± 0.037 cm/kA.
Table 4
Estimated Xenon Temperatures from Arc-Acoustic Frequencies (1.8-cm-Bore Flash Lamps)a
Arc-acoustic oscillation dat were observed in absorption at the 488-nm wavelength with a xenon fill of 90 Torr. The circuit time constant (3√LC) was 10 μs.
Local thermodynamic equilibrium.
Tables (4)
Table 1
Transmission–Absorption Coefficients of Long-Pulse Xenon Flash Lampsa
No.
Wavelength (μm)
Laser Source
Lamp Transmission T
Absorption Coefficient (cm−1)
1
3.391
Ne I
0.012 ± 0.008
3.38 ± 0.8
2
1.152
Ne I
0.089 ± 0.06
2.41 ± 0.2
3
1.064
Nd+3
0.21 ± 0.03
2.00 ± 0.11
4
0.647
Kr II
0.150 + 0.14
1.46 ± 0.07
5
0.633
Ne I
0.195 ± 0.018
1.26 ± 0.07
6
0.568
Kr II
0.279 ± 0.012
0.98 ± 0.03
7
0.488
Ar II
0.269 ± 0.015
1.01 ± 0.04
8
0.482
Kr II
0.299 ± 0.004
0.93 ± 0.01
9
0.476
Kr II
0.334 ± 0.005
0.84 ± 0.01
Measurements were made at j = 2.54 kA/cm2, 1.5-cm-bore flash lamp with cerium-doped fused silica walls, 450-Torr xenon pressure, and circuit time constant 600 μs.
Measurements were made at current density of 10.8 kA/cm2 with a 1.8-cm-bore flash lamp, Suprasil walls, 30-Torr xenon pressure, and circuit time constant 10 μs.
Mean 0.094 ± 0.018 cm/kA. The mean value of g including the long-pulse results in Table 2 is 0.112 ± 0.037 cm/kA.
Table 4
Estimated Xenon Temperatures from Arc-Acoustic Frequencies (1.8-cm-Bore Flash Lamps)a
Arc-acoustic oscillation dat were observed in absorption at the 488-nm wavelength with a xenon fill of 90 Torr. The circuit time constant (3√LC) was 10 μs.
Local thermodynamic equilibrium.