&lt;title&gt;High-power CO2 waveguide laser of the 1-kW category&lt;/title&gt;

Nowack, R.; Opower, H.; Schaefer, Uwe; Wessel, K.; Hall, Thomas; Krueger, Hans; Weber, Hubert

doi:10.1117/12.20528

Cited by 33 publications

(8 citation statements)

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“…This pressure is also higher than the pressure p = 150 hPa calculated with the similarity law for d = 1.6 mm (see table 1). The electrical power density reaches the same values of about 100 W cm −3 as obtained in rf discharges [10,11,16]. The maximum specific laser power of 0.46 W cm −2 (see figure 4) achieved is not the value 1.88 W cm −2 calculated by formula (2).…”

Section: Discharge Gap 16 MMsupporting

confidence: 50%

“…Compared to the CO 2 waveguide laser, the cooling of the slab laser (see figure 1) is only half as efficient because there are only two walls involved. The slab CO 2 laser represents an extension of the CO 2 waveguide laser principle towards higher laser power [10][11][12]. From the heat diffusion equation, it follows that there exists (for the case of uniform thermal conductivity and energy generation in the laser gas) a parabolic temperature distribution between the discharge walls.…”

Section: Gas Cooling In a Slab Co 2 Lasermentioning

confidence: 99%

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Sealed-off CO₂lasers excited by an all-solid-state 0.6 MHz generator

Wieneke¹,

Born²,

Viöl³

2000

J. Phys. D: Appl. Phys.

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Sealed-off CO2 lasers excited by a dielectric barrier discharge are studied. The laser output power is measured at excitation frequencies between 0.3 and 0.6 MHz; discharge gaps are in the range 1.6-6.0 mm. The excitation efficiency of the all-solid-state generator reaches 90%. Due to the scaling laws of radio frequency excitation no laser activity should be possible for the laser under investigation. The use of high-frequency excitation (0.3-0.6 MHz) combined with a dielectric barrier discharge gives the possibility of creating a homogeneous stable CO2 laser gas discharge with high laser activity. The specific laser power follows the 1/d scaling law due to gas cooling by diffusion. Even the optimal gas pressure can be increased by high-frequency excitation compared to the radio frequency excitation.

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Section: Discharge Gap 16 MMsupporting

confidence: 50%

Section: Gas Cooling In a Slab Co 2 Lasermentioning

confidence: 99%

Sealed-off CO₂lasers excited by an all-solid-state 0.6 MHz generator

Wieneke¹,

Born²,

Viöl³

2000

J. Phys. D: Appl. Phys.

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“…where E 0 is the electric field intensity, λ is the wavelength of the laser, H n is the Hermite polynomial, k is the wavenumber of the laser, and w 0 is the beam waist. We can see the aforementioned problem of the toric resonator in equation (1). For a given radial order, n, all the azimuthal modes have the same spatial distribution in the radial direction.…”

Section: Oscillation Modes Of Annular Resonatorsmentioning

confidence: 99%

“…There is a type of CO 2 laser in which the active medium is sandwiched by two planer slab electrodes placed close together [1][2][3]. It is called a slab CO 2 laser, or a diffusion-cooled CO 2 laser since the heat disposal of the active medium is achieved by the heat diffusion through the slab electrodes.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the w-axicon type optical resonator for coaxial slab CO₂lasers

Endo¹,

Yamaguchi²,

Uchiyama³

et al. 2000

J. Phys. D: Appl. Phys.

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The numerical simulation of the optical resonator for a coaxial slab CO2 laser is conducted. The resonator consists of a toric mirror, a w-axicon, and a plane output coupler. To hold the two slabs coaxially, struts exist in the annular gap region. The effects of the struts on the output power and beam quality for the given resonator are discussed. It is found that varying the vertex of the toric mirror can control the oscillation mode between the E00 fundamental mode and the E01 first azimuthal mode. It is revealed that the resonator loss of the fundamental mode can be smaller than the first azimuthal mode by shifting the vertex inward, and this results in single-mode oscillation at the E00 fundamental mode. On the other hand, the maximum output is obtained under conditions where the resonator oscillates at the E01 mode, because the nodes of the mode coincide with the position of the struts. Loss measurement of each eigenmode well describes the aforementioned phenomena.

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“…It is demonstrated, that is possible to create high power diffusion cooled lasers by using a new geometrical arrangement. This new type of diffusion cooled lasers are called slab CO 2 lasers [9]. Essential advantages of this type of lasers are a compact design and a high laser output power.…”

Section: Introductionmentioning

confidence: 99%

New additional cooling effect of diffusion cooled sealed-off CO₂ lasers excited by dielectric barrier discharges at about 1 MHz with an all-solid-state generator

Wieneke¹,

Uhrlandt²,

Viöl³

2004

Laser Phys. Lett.

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<title>High-power CO2 waveguide laser of the 1-kW category</title>

Cited by 33 publications

References 0 publications

Sealed-off CO₂lasers excited by an all-solid-state 0.6 MHz generator

Sealed-off CO₂lasers excited by an all-solid-state 0.6 MHz generator

Numerical simulation of the w-axicon type optical resonator for coaxial slab CO₂lasers

New additional cooling effect of diffusion cooled sealed-off CO₂ lasers excited by dielectric barrier discharges at about 1 MHz with an all-solid-state generator

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<title>High-power CO2 waveguide laser of the 1-kW category</title>

Cited by 33 publications

References 0 publications

Sealed-off CO2lasers excited by an all-solid-state 0.6 MHz generator

Sealed-off CO2lasers excited by an all-solid-state 0.6 MHz generator

Numerical simulation of the w-axicon type optical resonator for coaxial slab CO2lasers

New additional cooling effect of diffusion cooled sealed-off CO2 lasers excited by dielectric barrier discharges at about 1 MHz with an all-solid-state generator

Contact Info

Product

Resources

About

Sealed-off CO₂lasers excited by an all-solid-state 0.6 MHz generator

Sealed-off CO₂lasers excited by an all-solid-state 0.6 MHz generator

Numerical simulation of the w-axicon type optical resonator for coaxial slab CO₂lasers

New additional cooling effect of diffusion cooled sealed-off CO₂ lasers excited by dielectric barrier discharges at about 1 MHz with an all-solid-state generator