1000 W blue fiber-coupled diode-laser emitting at 450 nm

Baumann, Markus; Balck, Anne; Malchus, Jörg; Chacko, Rony Vincent; Marfels, Sören; Witte, Ulrich; Dinakaran, Deepak; Ocylok, Sörn; Weinbach, Matthias; Bachert, Charley; Kösters, Arnd; Krause, Volker; König, Harald; Lell, A.; Stojetz, Bernhard; Ali, Muhammad; Strauß, Uwe

doi:10.1117/12.2511255

Cited by 30 publications

(13 citation statements)

References 2 publications

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“…Infrared diode lasers (λ ≈ 820 nm) provide higher absorption and can be increased at a shorter wavelength [62]. Emission of 450 nm wavelength (a blue laser) is preferable for highly reflective metals and proven on the industrial scale [63,64] (see Figure 6b). These lasers can be produced up to 2.0 kW, which is enough to weld more than 1 mm thick Cu.…”

Section: Thermophysical Properties Of Different Metals and Laser Beam Absorptionmentioning

confidence: 99%

A Review on Laser-Assisted Joining of Aluminium Alloys to Other Metals

Bunaziv

Akselsen

Ren

et al. 2021

Metals

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Modern industry requires different advanced metallic alloys with specific properties since conventional steels cannot cover all requirements. Aluminium alloys are becoming more popular, due to their low weight, high corrosion resistance, and relatively high strength. They possess respectable electrical conductivity, and their application extends to the energy sector. There is a high demand in joining aluminium alloys with other metals, such as steels, copper, and titanium. The joining of two or more metals is challenging, due to formation of the intermetallic compound (IMC) layer with excessive brittleness. High differences in the thermophysical properties cause distortions, cracking, improper dilution, and numerous weld imperfections, having an adverse effect on strength. Laser beam as a high concentration energy source is an alternative welding method for highly conductive metals, with significant improvement in productivity, compared to conventional joining processes. It may provide lower heat input and reduce the thickness of the IMC layer. The laser beam can be combined with arc-forming hybrid processes for wider control over thermal cycle. Apart from the IMC layer thickness, there are many other factors that have a strong effect on the weld integrity; their optimisation and innovation is a key to successfully delivering high-quality joints.

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Section: Thermophysical Properties Of Different Metals and Laser Beam Absorptionmentioning

confidence: 99%

A Review on Laser-Assisted Joining of Aluminium Alloys to Other Metals

Bunaziv

Akselsen

Ren

et al. 2021

Metals

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“…After the first development of nitride laser diodes (LDs) in 1996 [1] and first demonstration of blue LDs in 2001 [2] by Nichia, the performance of blue LDs has improved considerably. To date, InGaN/GaN-based blue LDs have attracted significant attention for use in light sources for laser displays [3][4][5], laser-based white lighting [6][7][8], free-space or underwater communications [9][10][11], and laser-based materials processing [12][13][14]. In recent years, high-power operation of InGaN blue LDs with >5 W output power in a single chip has been demonstrated, mainly by company research groups such as Nichia, Osram, and Sony [3,4,12].…”

Section: Introductionmentioning

confidence: 99%

“…To date, InGaN/GaN-based blue LDs have attracted significant attention for use in light sources for laser displays [3][4][5], laser-based white lighting [6][7][8], free-space or underwater communications [9][10][11], and laser-based materials processing [12][13][14]. In recent years, high-power operation of InGaN blue LDs with >5 W output power in a single chip has been demonstrated, mainly by company research groups such as Nichia, Osram, and Sony [3,4,12]. They also reported the low-threshold and high-efficiency operation of blue LDs with a threshold current density (J th ) < 1 kA/cm 2 , slope efficiency (SE) > 2 W/A, and wall-plug efficiency (WPE) > 40% [3,12].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, high-power operation of InGaN blue LDs with >5 W output power in a single chip has been demonstrated, mainly by company research groups such as Nichia, Osram, and Sony [3,4,12]. They also reported the low-threshold and high-efficiency operation of blue LDs with a threshold current density (J th ) < 1 kA/cm 2 , slope efficiency (SE) > 2 W/A, and wall-plug efficiency (WPE) > 40% [3,12]. Very recently, a university research group at Xiamen university also reported comparable performance of a blue LD with a J th of ~1 kA/cm 2 and an SE of 1.8 W/A [15].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Optimum Mg Doping Concentration in p-Type-Doped Layers of InGaN Blue Laser Diode Structures

Onwukaeme

Ryu

2021

Crystals

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In GaN-based laser diode (LD) structures, Mg doping in p-type-doped layers has a significant influence on the device performance. As the doping concentration increases, the operation voltage decreases, whereas the output power decreases as a result of increased optical absorption, implying that optimization of the Mg doping concentration is required. In this study, we systematically investigated the effect of the Mg doping concentration in the AlGaN electron-blocking layer (EBL) and the AlGaN p-cladding layer on the output power, forward voltage, and wall-plug efficiency (WPE) of InGaN blue LD structures using numerical simulations. In the optimization of the EBL, an Al composition of 20% and an Mg doping concentration of 3 × 1019 cm−3 exhibited the best performance, with negligible electron leakage and a high WPE. The optimum Mg concentration of the p-AlGaN cladding layer was found to be ~1.5 × 1019 cm−3, where the maximum WPE of 38.6% was obtained for a blue LD with a threshold current density of 1 kA/cm2 and a slope efficiency of 2.1 W/A.

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“…The output power of the red LD stack can be as high as 56W and the optical-coupled module constructed by incoherent combination has a maximum output power of 100W (Andreas et al 2013). The blue LD bar has reached 98w, and the fiber-coupled module based on the bar has reached 1KW presented by Laserline and OSRAM in February 2019 (Baumann et al 2019). And in September 2020, Nuburu launch the latest blue fiber-coupled module (Feve J et al 2020), AI-1500, which increase the power to 1.5KW under 11 mm•mrad from a 100μm /0.22 numerical aperture (NA) fiber, taking a different approach that mounts Osram's GaN single-emitter diodes on a ship in series.…”

Section: Introductionmentioning

confidence: 99%

1.5-W 520 nm continuous-wave output from a 50 μm/0.22NA fiber-coupled laser diode module

et al. 2021

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In this paper, a high brightness fiber-coupled module with a central wavelength of 520nm is simulated and designed by ray-tracing software ZEMAX, and then is experimentally implemented. Three 1-w continuous-wave green LD single emitters based on TO-9-package are successively collimated, spatially combined, and focused into an optical fiber with a core diameter of 50 μm and a numerical aperture of 0.22. The final output power of 1.53w is obtained, corresponding to an optical-optical conversion efficiency of 51% and an electro-optical conversion efficiency of 10%, and the tolerance between the simulation and the experimental result is analyzed and explained.

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1000 W blue fiber-coupled diode-laser emitting at 450 nm

Cited by 30 publications

References 2 publications

A Review on Laser-Assisted Joining of Aluminium Alloys to Other Metals

A Review on Laser-Assisted Joining of Aluminium Alloys to Other Metals

Investigation of the Optimum Mg Doping Concentration in p-Type-Doped Layers of InGaN Blue Laser Diode Structures

1.5-W 520 nm continuous-wave output from a 50 μm/0.22NA fiber-coupled laser diode module

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