Applications of high-power visible and UV lasers in manufacturing

Knowles, M. R. H.; Bell, Andrew; Rutterford, Graham; Booth, H.J.; Foster-Turner, G.; Kearsley, A. J.

doi:10.1117/12.377022

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…rr F TbKtpA l = to----~-L---~--j (3) The mass of vaporised (my) and that of molten (ml) substrate material per pulse during LD can be calculated using the energy balance Eqs. 4 and 5.…”

Section: Discussionmentioning

confidence: 99%

“…With the advent of micro electro mechanical systems, precision machining of micro holes has acquired greater importance. It is also used in technology intensive areas like producing holes in N.D. Pandey [1][2][3][4][5]. These areas are of high strategic and techno-commercial importance; however, basic aspects of LD are not discussed in literature [6].…”

Section: Introductionmentioning

confidence: 99%

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Percussion drilling with laser: hole completion criterion

Pandey

Shan

Bharti

2006

Int J Adv Manuf Technol

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The criterion for ensuring formation of a through hole is an important aspect of laser drilling. Close observation of the process has indicated that drilling of the substrate is achieved in six successive microstages. The stages have been time resolved and the behaviour of laser induced plasma (LIP) during the microstages of drilling has been carefully examined. The LIP behaviour during the percussion laser drilling has been explained with the help of the contemporary understanding of plasma. This paper proposes a drilling completion criterion that is based on the behaviour of LIP during laser percussion drilling of SUPERNI 263A with a Nd-doped yttrium aluminium garnet laser. The completion of formation of a hole is marked by the momentarily increased luminescence of the plasma plume emanating from the laser beam exit side of the workpiece during drilling. The criterion has been experimentally verified. The criterion is versatile and can help in augmenting productivity during manufacturing.

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“…rr F TbKtpA l = to----~-L---~--j (3) The mass of vaporised (my) and that of molten (ml) substrate material per pulse during LD can be calculated using the energy balance Eqs. 4 and 5.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Percussion drilling with laser: hole completion criterion

Pandey

Shan

Bharti

2006

Int J Adv Manuf Technol

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“…With the improvement of the output power of blue laser diodes (LDs) based on GaN, as well as continuous research progress, the output power of the red laser light based on Pr:YLF (Pr 3 :LiYF 4 ) has increased from 1.8 mW, which was first reported by Richter et al in 2004 [13] , to the current maximum of 8.14 W in 2021 [14] . Direct red laser generation based on Pr 3 doping can also produce effective coherent ultraviolet radiation through simple frequency doubling, offering a straightforward solution for pulsed visible and UV sources, which are required for materials processing [15] and lithography [16] .…”

Section: Introductionmentioning

confidence: 99%

Watt-level acousto-optically Q-switched Pr:YLF laser at 639 nm

Xue,

Zhang,

Dai

et al. 2024

中国光学快报

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We present a study on a watt-level acousto-optically Q-switched Pr:YLF laser at three different repetition rates (10 kHz, 20 kHz, and 50 kHz) for the first time, to the best of our knowledge. The corresponding average output powers and pulse widths were measured to be 1.14 W, 1.2 W, and 1.32 W, and 40 ns, 52 ns, and 80 ns, respectively. A maximum pulse energy of 0.11 mJ was obtained, corresponding to a peak power of up to 2.8 kW at a repetition rate of 10 kHz. The simulated dynamics of a fast Q-switched Pr:YLF laser is in agreement with the experiment. The laser's ability to generate stable pulses with high peak power and short pulse width makes it highly desirable for various practical applications, such as laser machining and material processing.

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“…Ultraviolet lasers find various applications, for example, in efficient cutting and drilling of small holes in a variety of materials, fabrication of fiber Bragg gratings, chemical/biochemical analysis, high‐density data storage, or some methods of eye surgery . Therefore, it is clear that producing small, compact, and fast‐modulated semiconductor lasers emitting light in this range would be strongly desired.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of ultraviolet ZnO/Zn_0.8 Mg_0.2 O laser diodes on GaN or Al₂ O₃ substrates: Toward electrically pumped devices

Szymański

Teisseyre

Kozanecki

2014

Phys. Status Solidi A

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We propose a new type of laser structure based both on oxide and nitride semiconductors. Due to a lack of p‐type conductivity in the zinc oxide, we put forward the idea to use p‐type gallium nitride with ZnO/ZnMgO active region. Unfortunately, refractive index of nitrides is larger than in oxides, which means that the transverse mode will tend to propagate outside the active layer. We performed calculations of the optical confinement factor and the beam divergence by using the transfer matrix method. In our design, we use the concept of placing the waveguide layer outside the active region. This paper details the way to practical realization of such a novel device.

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Applications of high-power visible and UV lasers in manufacturing

Cited by 5 publications

References 2 publications

Percussion drilling with laser: hole completion criterion

Percussion drilling with laser: hole completion criterion

Watt-level acousto-optically Q-switched Pr:YLF laser at 639 nm

Theoretical study of ultraviolet ZnO/Zn_0.8 Mg_0.2 O laser diodes on GaN or Al₂ O₃ substrates: Toward electrically pumped devices

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Applications of high-power visible and UV lasers in manufacturing

Cited by 5 publications

References 2 publications

Percussion drilling with laser: hole completion criterion

Percussion drilling with laser: hole completion criterion

Watt-level acousto-optically Q-switched Pr:YLF laser at 639 nm

Theoretical study of ultraviolet ZnO/Zn0.8 Mg0.2 O laser diodes on GaN or Al2 O3 substrates: Toward electrically pumped devices

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Product

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Theoretical study of ultraviolet ZnO/Zn_0.8 Mg_0.2 O laser diodes on GaN or Al₂ O₃ substrates: Toward electrically pumped devices