Micro-milling process improvement using an agile pulse-shaping fiber laser

Cournoyer, Alain; Deladurantaye, Pascal; Briand, Martin; Roy, Vincent; Labranche, Bruno; Levesque, Marc; Taillon, Yves

doi:10.1117/12.839707

Cited by 15 publications

(16 citation statements)

References 10 publications

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“…Pulses from this regime may be useful for remote sensing (e.g. spectrally sensitive LIDAR [20]) and machining applications [21]. In addition to the pulse width variations introduced through modifying the pump power, the pulse width would change with cavity loss.…”

Section: Oscillator Resultsmentioning

confidence: 99%

Amplified 2-<formula formulatype="inline"><tex Notation="TeX">$\mu{\rm m}$</tex></formula> Thulium-Doped All-Fiber Mode-Locked Figure-Eight Laser

Rudy

Urbánek

Digonnet

et al. 2013

J. Lightwave Technol.

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We report the first mode-locked, thulium-doped fiber figure-eight laser. The mode-locked oscillator produces 1.5-ps pulses with 63 pJ of pulse energy at a 10.4-MHz repetition rate with a 3-nm bandwidth at a center wavelength of 2034 nm. After amplification, the pulses are compressed to 370 fs with 50 nJ of pulse energy. The oscillator can also operate in a square pulse regime, yielding stable pulses from 100 ps to 20 ns long with 100 nJ per pulse after amplification.

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Section: Oscillator Resultsmentioning

confidence: 99%

Amplified 2-<formula formulatype="inline"><tex Notation="TeX">$\mu{\rm m}$</tex></formula> Thulium-Doped All-Fiber Mode-Locked Figure-Eight Laser

Rudy

Urbánek

Digonnet

et al. 2013

J. Lightwave Technol.

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“…For a given spot size and a given average power at constant repetition rate, the flexibility of the MOPAW laser platform allows for changing the pulse peak power density through the control of the pulse duration at constant pulse energy density [8] (see Table 2). In those conditions, longer pulses will result in lower pulse peak power densities.…”

Section: Resultsmentioning

confidence: 99%

“…Using an electro-optic modulator as a pulse picker, the repetition rate of the pulse train could be reduced from 200 kHz down to 400 Hz, leading to a pulse-to-pulse overlap of approximately 57% and a dose of ~2 shots/spot. [8] Operation at 200 kHz increased the dose by a factor of 500. …”

Section: Methodsmentioning

confidence: 98%

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Influence of different laser operation regimes on the specific energy required for rock removal in oil and gas well drilling applications

et al. 2009

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Although many practical hurdles remain to be addressed in the future, laser oil and gas well drilling has potential advantages over the conventional rotary drilling approach, such as a smaller footprint of the drilling rig, higher rates of penetration, reduction of downtime due to dull bits, reduction of waste caused by drilling mud, creation of a natural casing while drilling, and ability to drill in hard rock formations. One of the most promising applications is downhole laser perforation for well completion as an alternative to explosive technologies currently in use. In order to establish both the technical and economic feasibility of using lasers in oil and gas drilling operations, one can measure the laser energy required to remove a unit volume of rock. The resulting specific energy is a measure of the efficiency of the laser drilling process and depends on the rock type and the laser operation regime that determines the laser-rock interaction mechanism. In the present feasibility study, we compare the results of laser drilling tests conducted in two types of reservoir rocks, namely limestone and sandstone, at different laser wavelengths and for different laser operation regimes (continuous wave and pulsed regimes, different repetition rates and duty cycles) in terms of specific energy. We also discuss preliminary results on the influence of the temporal shape of the laser pulses in the nanosecond regime on the rock removal process as obtained with INO pulse-shaping fiber laser platform, with the objective to take advantage of the flexibility and the agility of such a laser source for drilling operations in different rock types.

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“…Finally, we note that ablative removal of material by way of vaporisation is significantly less efficient than that suggested by Eq. (1) and depends strongly on pulse energy and duration [32,33]. Experimentally it has been shown that in practice, ablation processes using nanosecond pulsed lasers are at best 48% efficient [32].…”

Section: Theorymentioning

confidence: 99%

Increasing the efficiency of material removal using dual laser micromachining

Alkhawaldeh

Coupland

Jones

2020

Int J Adv Manuf Technol

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A continuous wave melting laser combined with a nanosecond ejection laser has been shown to improve the material removal efficiency by a factor of 2 to 8 compared with laser ablation processes reported in the literature. The decrease in the energy required for the combined lasers is primarily due to the optimisation of the irradiation time in the melting process, which is responsible for the majority of the total energy. For the laser used in this study, the optimal interaction time corresponding to the highest melting efficiency was found at 9-ms melting time, and this value is compared with results derived from a onedimensional heating model. Metallurgical images of only melting and the produced hole after introducing the ejection pulse for the most efficient melting were presented as evidence of melt ejection. The results show that approximately 90% of the melt pool is ejected with little redeposited material at the periphery of the hole.

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Micro-milling process improvement using an agile pulse-shaping fiber laser

Cited by 15 publications

References 10 publications

Amplified 2-<formula formulatype="inline"><tex Notation="TeX">$\mu{\rm m}$</tex></formula> Thulium-Doped All-Fiber Mode-Locked Figure-Eight Laser

Amplified 2-<formula formulatype="inline"><tex Notation="TeX">$\mu{\rm m}$</tex></formula> Thulium-Doped All-Fiber Mode-Locked Figure-Eight Laser

Influence of different laser operation regimes on the specific energy required for rock removal in oil and gas well drilling applications

Increasing the efficiency of material removal using dual laser micromachining

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