Hybrid laser system with blue laser and near-infrared fiber laser for copper welding

Nakazumi, Masaya; Oguri, Akira; Ishige, Yuta; Konishi, Ryotaro; Hirao, T.; Takagi, Toshihisa; Matsumoto, N.; Hayamizu, N.; Mori, Hajime; Kaneko, Motozo; Tsukiji, Naoki

doi:10.1117/12.2607449

Cited by 3 publications

(6 citation statements)

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“…In addition, a hybrid laser system consisting of the blue LD modules and an IR fiber laser has been launched by Furukawa Electric Co., Ltd. In our previous report, we confirmed that the high absorption efficiency with blue laser light contributes to the molten pool stabilization and consequently suppresses the spatter generation during copper welding [2]. These results successfully demonstrated the effectiveness of using blue light sources for copper welding with high processing quality.…”

Section: Introductionsupporting

confidence: 72%

“…Spatially combining more LD beams was achieved by a smaller beam diameter collimated by a fast-axis collimator (FAC) lens with the short focal length in the optimal optics design. In the following sections, the details of the improvements for the 500 W model are described, comparing with the previous 250 W model [2].…”

Section: Overview Of Output Power Improvementmentioning

confidence: 99%

“…The thermal saturation of the L-I linearity has been suppressed owing to the higher heat dissipation, leading to improved light efficiency in the higher current range. Table 1 summarizes the characteristic and structural parameters of the LDs for previous 250 W model [2] and the 500 W model in this study. By changing the package structure and extending the LD cavity from 2000 µm to 2800 µm, the thermal resistance was reduced by 30 %, which can suppress the joule heat during LD operation.…”

Section: Improvement Of Ld Output Powermentioning

confidence: 99%

“…The blue laser is expected to be one of the candidate light sources for laser metal processing applications with some materials such as copper-based alloys, that have lower optical absorption in infrared (IR) wavelength range, but a higher one in blue wavelength range. We have already developed a laser diode (LD) module using multiple blue LDs under the joint development with Furukawa Electric Co., Ltd., [1,2]. In addition, a hybrid laser system consisting of the blue LD modules and an IR fiber laser has been launched by Furukawa Electric Co., Ltd.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High power and high luminance blue laser module using GaN-based laser diodes

Hatakeyama,

Tanahashi,

Konishi

et al. 2024

High-Power Diode Laser Technology XXII

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Blue lasers are promising light source candidates for laser metal processing such as copper welding and heating, because copper has a high optical absorption coefficient in the blue spectral region. We have jointly developed 250 W blue laser diode (LD) modules including multiple LD chips with Furukawa Electric Co., Ltd. Their hybrid laser system consisting of an infrared fiber laser and the blue LD modules has already been commercialized. In this study, we report on the development progress for higher optical output power of the blue LD module used in the hybrid laser system. Specifically, we have achieved the output power for the LD module over 500 W from the fiber with a 110µm core diameter by increasing the output power of the constituent blue LD chip from 13 W to 16 W and the number of the installed LDs from 24 pcs to 36 pcs. The luminance is more than 5 MW/cm 2 and the beam point parameter (BPP) is almost 9 mm-mrad.

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Section: Introductionsupporting

confidence: 72%

Section: Overview Of Output Power Improvementmentioning

confidence: 99%

Section: Improvement Of Ld Output Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High power and high luminance blue laser module using GaN-based laser diodes

Hatakeyama,

Tanahashi,

Konishi

et al. 2024

High-Power Diode Laser Technology XXII

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show abstract

“…In laser processing, a compact side-lead package (SLP) with a high-power blue LD has been developed, and the optical output power from one blue LD in the SLP is 13.2 W at 8.5 A rated current. And by integrating SLPs, a blue direct diode laser (DDL) module with the optical output power of 250 W from an optical fiber has been demonstrated [4]. Finally, we have also developed low-power blue and green VCSELs of about 1 mW that can be used in wearable displays.…”

Section: Introductionmentioning

confidence: 99%

Blue and green edge-emitting laser diodes and vertical-cavity surface emitting lasers on C-plane GaN substrates

Nakatsu

Hirao

Morizumi

et al. 2023

Gallium Nitride Materials and Devices XVIII

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This paper reports the latest device performance of high-power blue and green edge-emitting laser diodes (LDs). The epitaxial layers of LDs were grown by metal organic chemical vapor deposition (MOCVD) on C-plane free-standing GaN substrates. And a ridge type structure was formed at the top of p-type layers. Fabricated every LD chip was mounted on a heat sink using a junction down method in a TO-Φ9 mm package. We optimized the epitaxial and the device structures for high efficiency and high optical output power. A new developed 455 nm blue LD showed the optical output power and the voltage of 5.90 W and 3.81 V at the forward current of 3 A under Continuous Wave (CW) operation. The wall-plug efficiency (WPE) of the 455 nm blue LD was 51.6 % at 3 A. This is the highest WPE reported so far. The peak WPE of the 455 nm LD was 52.4 % at the forward current of 2.2 A. And a new developed 525 nm green LD showed the optical output power and the voltage of 1.86 W and 4.12 V at the forward current of 1.9 A under CW operation. The wall-plug efficiency (WPE) of the 525 nm green LD was 23.8 % at 1.9 A. This is the highest WPE reported so far. The peak WPE of the 525 nm LD was 25.9 % at the forward current of 1.1 A.

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Development of highly efficient blue and green edge-emitting laser diodes

Kishimoto,

Hirao,

Morizumi

et al. 2024

Gallium Nitride Materials and Devices XIX

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This report shows the latest developments of Gallium nitride (GaN)-based blue (455nm) and green (525nm) edge-emitting laser diodes (LDs). The epitaxial layers were grown on c-plane free-standing GaN substrates by metal-organic chemical vapor deposition (MOCVD), and a ridge-type structure for refractive-index waveguide was fabricated. Each LD chip was mounted on a heat sink in a TO-Φ9 mm CAN package by a junction down method for improving thermal dissipation. Optimization of epitaxial layers and device structures has led to improve the wall-plug efficiency (WPE) of LDs. The WPE and the optical output power of the blue LD have reached to 52.4% and 5.99 W at the current of 3.0 A under continuous wave (CW) operation, respectively. We also confirmed that the WPE and the optical output power of the green LD were 24.2 % and 1.90 W at the CW current of 1.9 A, respectively. Each WPE is the highest value ever reported of blue and green LDs. On top of this, the lifetime tests of both LDs over 1000 hours indicate the long lifetime more than 30,000 hours defined by the time when an optical output power is expected to be lower than the half of initial value.

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Hybrid laser system with blue laser and near-infrared fiber laser for copper welding

Cited by 3 publications

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High power and high luminance blue laser module using GaN-based laser diodes

High power and high luminance blue laser module using GaN-based laser diodes

Blue and green edge-emitting laser diodes and vertical-cavity surface emitting lasers on C-plane GaN substrates

Development of highly efficient blue and green edge-emitting laser diodes

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