Fiber coupled diode laser beam parameter product calculation and rules for optimized design

Wang, Zuolan; Drovs, Simon; Segref, Armin; Koenning, Tobias; Pandey, Rajiv

doi:10.1117/12.875386

Cited by 19 publications

(16 citation statements)

References 2 publications

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“…(2) Previous literature states that for efficient fiber coupling BPP dia has to be smaller than the BPP of the fiber (BPP fiber ) into which the beam has to be coupled, but to the best of our knowledge the proof is found in published literature only for Eq. 2 [8]. In our work, we found that Eq.…”

Section: Introductionmentioning

confidence: 63%

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Investigation of collimating and focusing lenses’ impact on laser diode stack beam parameter product

Liu

Braglia

et al. 2015

Appl. Opt.

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The paper presents a new expression for determining the beam parameter product of a multi-emitter laser diode module made by stacking several single emitter chips. The proposed formula takes into account the effect of collimating and focusing lenses and has been validated experimentally, obtaining excellent agreement between theoretical expectations and measurements. A practical application to optimize the lenses' configuration for the design of a fiber-coupled multi-emitter module is also reported.

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Section: Introductionmentioning

confidence: 63%

“…where BPP dia is the diagonal BPP of a laser diode stack, and BPP fast and BPP slow denote the BPP along fast axis (FA) and slow axis (SA) direction, respectively. Another common definition is [8] BPP dia = BPP slow + BPP fast .…”

Section: Introductionmentioning

confidence: 99%

Investigation of collimating and focusing lenses’ impact on laser diode stack beam parameter product

Liu

Braglia

et al. 2015

Appl. Opt.

View full text Add to dashboard Cite

show abstract

“…The laser parameter product (BPP) is usually used to evaluate the beam quality of diode lasers [16,17] . According to ISO-11146 standard, BPP can be expressed as…”

Section: Experimental Simulation and Designmentioning

confidence: 99%

Beam homogenization structure for a laser illuminator design based on diode laser beam combining technology

et al. 2023

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With the rapid development of laser technology, laser as the light source of night vision illuminating can realize long-distance and clear imaging, which has been widely used in laser active illuminating field. A high-power diode laser with a wavelength of 808 nm was designed as the laser active illuminating source, and the output power of no less than 100 W was obtained by spatial beam multiplexing, polarization multiplexing, and high efficiency fiber coupling techniques. In view of the beam homogenization of illuminating source, a novel beam homogenization system based on waveguide is proposed in this work. A square spot with a horizontal divergence angle of 40°, a vertical divergence angle of 10°, and an illuminating power ratio of 4:1 was obtained by a collimating lens. Comparing with the traditional circular illuminating beam, the square illuminating beam can match the illuminating angle of CCD camera better, and the energy utilization rate is higher. In addition, by optimizing the structure of waveguide and collimating lens, the illuminating angle can be changed to meet the illuminating requirements under different conditions theoretically.

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“…(1). [28][29][30][31][32] Guaranteeing an efficient fiber coupling: BPP total <BPP fiber , is only possible if the symmetrization of BPPs in both axes is achieved.…”

Section: Optical System Designmentioning

confidence: 99%

“…The emerging laser beam is a stripe with different beam profiles in both directions. [17][18][19] Different approaches have been proposed for diode laser beam shaping to obtain a circular focus spot. Zbinden et al and Graf et al 20,21 considered a diode laser bar coupled into a multitude of fibers leading to a fiber bundle at the output end.…”

Section: Introductionmentioning

confidence: 99%

Optical design and development of a fiber coupled high-power diode laser system for laser transmission welding of plastics

et al. 2012

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Laser transmission welding (LTW) of thermoplastics is a direct bonding technique already used in different industrial applications sectors such as automobiles, microfluidics, electronics, and biomedicine. LTW evolves localized heating at the interface of two pieces of plastic to be joined. One of the plastic pieces needs to be optically transparent to the laser radiation whereas the other part has to be absorbent, being that the radiation produced by high power diode lasers is a good alternative for this process. As consequence, a tailored laser system has been designed and developed to obtain high quality weld seams with weld widths between 0.7 and 1.4 mm. The developed laser system consists of two diode laser bars (50 W per bar) coupled into an optical fiber using a nonimaging solution: equalization of the beam parameter product (BPP) in the slow and fast axes by a pair of step-mirrors. The power scaling was carried out by means of a multiplexing polarization technique. The analysis of energy balance and beam quality was performed considering ray tracing simulation (ZEMAX®) and experimental validation. The welding experiments were conducted on acrylonitrile/butadiene/styrene (ABS), a thermoplastic frequently used in automotive, electronics and aircraft applications, doped with two different concentrations of carbon nanotubes (0.01% and 0.05% CNTs). Quality of the weld seams on ABS was analyzed in terms of the process parameters (welding speed, laser power and clamping pressure) by visual and optical microscope inspections. Mechanical properties of weld seams were analyzed by mechanical shear tests. High quality weld seams were produced in ABS, revealing the potential of the laser developed in this work for a wide range of plastic welding applications.

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Fiber coupled diode laser beam parameter product calculation and rules for optimized design

Cited by 19 publications

References 2 publications

Investigation of collimating and focusing lenses’ impact on laser diode stack beam parameter product

Investigation of collimating and focusing lenses’ impact on laser diode stack beam parameter product

Beam homogenization structure for a laser illuminator design based on diode laser beam combining technology

Optical design and development of a fiber coupled high-power diode laser system for laser transmission welding of plastics

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