Compact and efficient DPSS laser using diamond-cooled technology

Chou, H. P.; Wang, Yulin; Hasson, V.

doi:10.1117/12.548427

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…21 The diamond cooling approach has recently been patented and first encouraging experimental results were reported with composite diamond-Nd:YAG active elements. 26,42 In the laser experiments conducted to date, the gain medium has been configured of one diamond disk between two Nd:YAG disks in the laser test bed diagrammed in Figure 9. Over 50% extraction efficiency has been experimentally demonstrated with average laser output power up to 50 Watts, which corresponds to a specific volumetric power extraction of 2000 W/cc and a 250 W/cm 2 heat removal rate for this very compact laser device.…”

Section: Diamond Coolingmentioning

confidence: 99%

<title>Path toward a high-energy solid-state laser</title>

et al. 2004

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Lasers have come a long way since the first demonstration by Maiman of a ruby crystal laser in 1960. Lasers are used as scientific tools as well as for a wide variety of applications for both commercial industry and the military. Today lasers come in all types, shapes and sizes depending on their application. The solid-state laser has some distinct advantages in that it can be rugged, compact, and self contained, making it reliable over long periods of time. With the advent of diode laser pumping a ten times increase in overall laser efficiency has been realized. This significant event, and others, is changing the way solid-state lasers are applied and allows new possibilities. One of those new areas of exploration is the high energy laser. Solid-state lasers for welding are already developed and yield energies in the 0.5 to 6 kilojoule range. These lasers are at the forefront of what is possible in terms of high energy solid-state lasers. It is possible to achieve energies of greater than 100 kJ. These sorts of energies would allow applications, in addition to welding, such as directed energy weapons, extremely remote sensing, power transfer, propulsion, biological and chemical agent neutralization and unexploded and mine neutralization. This article will review these new advances in solid-state lasers and the different paths toward achieving a high energy laser. The advantages and challenges of each approach will be highlighted.

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Section: Diamond Coolingmentioning

confidence: 99%

<title>Path toward a high-energy solid-state laser</title>

et al. 2004

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“…Recently, a promising power scaling approach has been proposed based on laser designs where efficient longitudinal cooling is achieved by placing the active medium in contact with high optical quality, laser finished and highly thermally conductive heat-spreading material (optical heat-spreader) inside a laser cavity. To date, this approach has been validated in the United States [1] and Israel [2] where Diamond has been employed as the thermally conductive medium in small area solid state (SS) lasers (so-called, "diamond-cooling approach"). However, the practical use of diamond as the medium for heat removal is understood to be of limited use due to its great expense, currently limited optical quality and size.…”

Section: Introductionmentioning

confidence: 99%

Thermal management of solid state lasers using optical quality silicon carbide

Newburgh

Dubinskii

2006

SPIE Proceedings

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We have demonstrated for the first time, to the best of our knowledge, that Silicon Carbide (SiC) may be used as an efficient heat sinking material for face cooling of gain media in solid-state lasers. Comparative thermal modeling and temperature distribution measurements of diode-pumped 4 at.% Nd:YAG ceramic laser medium face cooled by undoped YAG (as a baseline), Diamond and SiC lead to the conclusion that SiC is an effective replacement for much more expensive diamond as an intracavity face cooling material. Laser performance of a SiC face-cooled 4 at.% Nd:YAG ceramic press-fit stack was demonstrated with a 24% slope efficiency with no AR coatings between the SiC and YAG.

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“…The diamond cooled laser approach has been validated in the United States [1] and Israel [2] where diamond has been employed as the thermally conductive medium in small area solid state (SS) lasers. We recently demonstrated the use of SiC as a replacement for diamond in the face cooled laser [3].This work used a single wafer of SiC in pressure-contact (press contact) with 4% Nd:YAG without AR coating between SiC and Nd:YAG.…”

Section: Introductionmentioning

confidence: 99%

A silicon carbide face cooled ceramic Nd:YAG laser

2007

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We present lasing results of a SiC face cooled 4% Nd:YAG ceramic in an unstable cavity mode configuration (slope efficiency 35%) under quasi-CW pump conditions. This work demonstrates the first time lasing of a high temperature bonded , anti-reflection (AR) coated bonded SiC/Nd:YAG assembly. Finite Element Analysis (FEA) modeling of the temperature, stress, thermal lensing and polarization loss of the SiC/Nd:YAG stack under lasing conditions are presented.

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Compact and efficient DPSS laser using diamond-cooled technology

Cited by 10 publications

References 9 publications

<title>Path toward a high-energy solid-state laser</title>

<title>Path toward a high-energy solid-state laser</title>

Thermal management of solid state lasers using optical quality silicon carbide

A silicon carbide face cooled ceramic Nd:YAG laser

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