Visible high power fiber coupled diode lasers

Köhler, Bernd; Drovs, Simon; Stoiber, Michael; Dürsch, Sascha; Kissel, H.; Könning, Tobias; Biesenbach, Jens; König, Harald; Lell, A.; Stojetz, Bernhard; Löffler, Andreas; Strauß, Uwe

doi:10.1117/12.2291397

Cited by 5 publications

(5 citation statements)

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“…Due to the characteristics of the TO-can diode laser, the emitting surface of the LD chip has a certain distance from the window of the package cap. Most of the current research chooses to place the fast and slow axis collimating lenses outside the TO-can package [11][12][13][14] or to collimate the fast and slow axes simultaneously with a single aspheric lens [17]. However, since the divergence angle in the fast axis is too large, the beam becomes extremely large from the LD chip emitting surface.…”

Section: Fast and Slow Axes Collimationmentioning

confidence: 99%

“…The higher brightness fiber-coupled green diode laser module was 3.125MW/(cm 2 •Sr) supplied in a 100μm/0.15NA optical fiber, with an output power of 19.13W [11]. From the research results in recent years, we discovered that there is still a lot of opportunity for the development of highpower, high brightness green diode lasers modules [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Design of high brightness fiber-coupled green diode laser module

Liu

Qin

et al. 2022

Seventeenth National Conference on Laser Technology and Optoelectronics

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As a pump source for Ti: Sapphire solid-state lasers, the fiber-coupled green diode laser module is critical. However, existing study findings are insufficient to meet the demands of high brightness diode laser pump sources. In this paper, a high brightness green diode laser fiber-coupled system based on TO-can diode lasers is designed. The FACs are installed within the TO-can diode lasers. The optical step as the spatial beam combining system is made up of the HR mirror and the optical wedge. We discussed the relationship between the reflected beam deflection angle and the optical wedge surface inclination angle under the condition of different HR mirror inclination angles. After that, a strategy with appropriate heat dissipation effect is obtained through thermal simulation. Finally, the simulation results verify that couple 18 TO-can single emitters into a 50μm core diameter and 0.22 numerical aperture optical fiber with an output power of 16.9W, the fiber coupling efficiency is 98%. The brightness is 5.66 MW/(cm 2 • Sr) and the module dimension is L 220mm×W 80mm×H 45mm.

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Section: Fast and Slow Axes Collimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of high brightness fiber-coupled green diode laser module

Liu

Qin

et al. 2022

Seventeenth National Conference on Laser Technology and Optoelectronics

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“…On the other end of the power scale, there is the need for blue light sources in the range of several kW output power. Such light sources are typically realized by combining multiple stacks of laser bars and coupling the output of these into one fiber [3,4,5,6,7,8,9]. Using polarization coupling of devices emitting at 450nm, output powers of 2 kW have been reached.…”

Section: Introductionmentioning

confidence: 99%

InGaN semiconductor laser diodes for the visible spectral range: design and process optimization of single emitters and bars for applications from mW to kW output power

Gerhard

Naehle²,

Jentzsch

et al. 2023

Gallium Nitride Materials and Devices XVIII

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InGaN lasers in the blue and green wavelength range have opened a wide variety of applications in the past years, which all require unique properties of the employed laser chips. In this paper we will show design and process developments for various InGaN laser designs, each optimized for its specific application.For applications which are very sensitive to energy consumption, like mobile AR/VR devices, we investigated InGaN laser chips with resonator lengths as short as 50 µm. To achieve this, we developed an etched facets technology to overcome the challenges of scribing and breaking for facet generation for such short resonator lengths. The etched facets of these devices are coated on-wafer with a dielectric mirror to achieve the desired reflectivity. Depending on the reflectivity chosen, these devices show ultra-low threshold currents below 3mA and output powers above 50 mW. Combined with a flip-chip design with both contacts on one side, such chips can be integrated into silicon wafer-based beam combiners to generate RBG PIC chips for VR/AR laser projection.For high power applications, we will present data of laser bars. Bars emitting at 430 nm achieved 100 W of continuouswave output power per bar and conversion efficiencies of 50%. Together with bars emitting at 450 nm, that were shown in previous publications, wavelength-multiplexing for materials-processing systems can be realized yielding blue laser light sources with multiple kilowatts of output powers.

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“…To achieve better output performance, beam-combining technology, including spatial beam combining and polarization beam combining, is still an effectively method improve the output power 8 – 11 Ding et al 10 .…”

Section: Introductionmentioning

confidence: 99%

“…7 To achieve better output performance, beam-combining technology, including spatial beam combining and polarization beam combining, is still an effectively method improve the output power. [8][9][10][11] Ding et al 10 reported a fiber-coupled green LD module with the brightness as high as 3.125 MW∕ðcm 2 • srÞ, corresponding to an output power of 19.13 W from a 100 μm∕0.15 NA optical fiber. And Zhou et al 9 reported a 36 W fiber-coupled green LD module coupled into a 200 μm∕0.22 NA optical fiber, with a brightness of 0.754 MW∕ðcm 2 • srÞ.…”

Section: Introductionmentioning

confidence: 99%

Design of high-brightness, fiber-coupled, beam shaping system based on a multichip 2D green laser diode array

Liu

Qin

et al. 2022

Opt. Eng.

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Small size, high-brightness fiber-coupled laser modules have always been the ultimate goal that all researchers are pursuing. A high-brightness 525 nm wavelength fiber-coupled system is designed and evaluated. Based on a multichip 2D green laser diode array, fast-axis collimators are set inside the light source, and a beam shaping system that can rearrange the beam and improve the beam quality in both axes is designed. The simulation results indicate that 24 single emitters are coupled into a 50 μm∕0.15 NA optical fiber successfully and the output power is 22.55 W. The brightness of 16.25 MW∕ðcm 2 • srÞ is calculated with fiber coupling efficiency is 97%.

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Visible high power fiber coupled diode lasers

Cited by 5 publications

References 0 publications

Design of high brightness fiber-coupled green diode laser module

Design of high brightness fiber-coupled green diode laser module

InGaN semiconductor laser diodes for the visible spectral range: design and process optimization of single emitters and bars for applications from mW to kW output power

Design of high-brightness, fiber-coupled, beam shaping system based on a multichip 2D green laser diode array

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