Modular microchannel cooled heatsinks for high average power laser diode arrays

Beach, Raymond J.; Benett, William J.; Freitas, B.L.; Mundinger, D.; Comaskey, B.; Solarz, R.; Emanuel, M.A.

doi:10.1109/3.135215

Cited by 119 publications

(17 citation statements)

References 22 publications

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“…But there are also number of problems linked with EDM and wire-EDM such as low productivity, high tool wear rate, lack of precision due to tool wear, unsuitable for batch production or multi-channels [226], thick recast layer (from 2.5 to 30 µm) [227], heat affected layer of 40-100 um [227], thick white layers (6-8 µm) with micro-cracks [228], poor surface integrity [229] and necessary post processing requirements [230]. Chemical etching is another alternative for the fabrication of micro-channels but it offers troubles of having high aspect-ratio micro-channels [231]. The comparison of different machining methods in terms of advantages and shortfalls is shown in Table 7.…”

Section: Fabrication Techniquesmentioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Machining, Joining and Modifications of Advanced Materials

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. This chapter reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes.

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Section: Fabrication Techniquesmentioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Machining, Joining and Modifications of Advanced Materials

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“…2,3 Following these recommendations one can expect a cooler lifetime ~10-20Khrs. In the discussion that follows, we review a technology based on micro-channels fabricated in Silicon 4,5 . We believe that this technology offers several key advantages over the existing copper MCCP technology, such as corrosion resistance, electrical isolation to the cooling water, minimal water sealing surfaces, manufacturing simplicity and power scalability.…”

Section: Introductionmentioning

confidence: 99%

Scalable high-power (>1kW/cm^2) diode laser stacks based on silicon monolithic micro-channel coolers

et al. 2007

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We describe the performance and reliability of high power vertical diode stacks based on silicon monolithic microchannel coolers (SiMMs) operating at >1000W/cm 2 CW at 808 and 940nm. The monolithic nature of these stacks makes them inherently robust and compact. Typical emitting dimensions for a 10-bar stack are ~8.8mm x 10mm with CW output power up to 1.5kW. Originally developed at Lawrence Livermore National Laboratory and now actively being developed for commercial applications at Coherent, this technology offers several advantages over current copper-based micro-channel coolers. These devices do not require use of DI water, strict monitoring and control of the pH level, careful control of the water velocity, or sealed cooling systems. The need for hydrostatic seals is also drastically reduced. A typical ten bar stack requires only 2 o-ring seals, compared to 20 such seals for a similar stack using copper microchannel cooling. Mature and readily available wet etching technology allows for cost effective batch fabrication of the sub-mount structure while achieving repeatable high precision components based on photolithographic fabrication processes.

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“…Flow boiling in microchannels has accumulated lots of research efforts during the last three decades [1,2] due to its attractive advantages for a wide range of applications including cooling high heat-flux microelectronic devices [3], high power laser diode arrays [4], solar cell [5], planar membraneless micro fuel cell [6] and chemical reactors [7]. It can dissipate significantly high heat fluxes utilizing the latent heat of coolant while requiring small rate of coolant flow, and simultaneously maintain the wall temperatures relatively uniform.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on flow boiling performance of reentrant and rectangular microchannels – A comparative study

Deng

Wan

Tang

et al. 2015

International Journal of Heat and Mass Transfer

110

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Modular microchannel cooled heatsinks for high average power laser diode arrays

Cited by 119 publications

References 22 publications

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Scalable high-power (>1kW/cm^2) diode laser stacks based on silicon monolithic micro-channel coolers

Experimental investigations on flow boiling performance of reentrant and rectangular microchannels – A comparative study

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