1064-nm DFB laser diode modules applicable to seeder for pulse-on-demand fiber laser systems

Yokoyama, Yoshitaka; Kan, Tetsuo; Kageyama, Takeo; Tanaka, Shin; Kondo, Hayato; Kanbe, Satoshi; Maeda, Y.; Mochida, Reio; Nishi, Kenichi; Yamamoto, Tsuyoshi; Takemasa, K.; Sugawara, Mitsuru; Arakawa, Yasuhiko

doi:10.1016/j.yofte.2014.08.004

Cited by 14 publications

(4 citation statements)

References 24 publications

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“…To produce the appropriate pulse shape at desired repetition rate gain switched laser diodes are used, usually with the distributed feedback architecture for producing pulses as short as several tens of picoseconds. The peak power at this short scale is around several 100 mW as reported in [17] where a 300 mW 50 ps pulses were achieved. Increasing the pulse length to nanosecond scale results in higher peak power [18].…”

Section: Introductionsupporting

confidence: 64%

DFB diode seeded low repetition rate fiber laser system operating in burst mode

Šajn¹,

Petelin²,

Agrež³

et al. 2017

Optics & Laser Technology

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Section: Introductionsupporting

confidence: 64%

DFB diode seeded low repetition rate fiber laser system operating in burst mode

Šajn¹,

Petelin²,

Agrež³

et al. 2017

Optics & Laser Technology

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“…While a mode-locked fiber laser is used in this demonstration, the low threshold power of the VCSELs allows the pump laser to be replaced by an electrically gain-switched diode laser and an SOA generating <50 pJ pulses. 27,28 Output pulses are longpass filtered to remove the lingering pump light before measurement with a 45 GHz detector (Newport Model 1014) and a 50 GHz sampling oscilloscope (HP 54750A). The pulse peak power is calculated from the measured average power and pulse width.…”

Section: Articlementioning

confidence: 99%

Synchronous tunable picosecond surface emitting lasers by optical gain-switching

Uyehara,

Ram,

Burgner

et al. 2024

APL Photonics

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Generation of sub-100 ps pulses tunable over 48 nm is demonstrated by optically gain-switching a MEMS-vertical-cavity surface-emitting laser (VCSEL). A minimum pulse width of 61 ps and a maximum, unamplified peak power of 28 mW are demonstrated. The polarization stability of the VCSELs allows amplification with a polarization-dependent semiconductor optical amplifier, resulting in pulse compression to 57 ps with a peak power of 932 mW. The low threshold power (average <1 mW) enables simultaneous pumping of multiple lasers for the generation of synchronized, independently tunable picosecond pulses.

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“…Maximal scanner throughput can theoretically be reached by controlling the pulse emission through the so-called pulse-on-demand (POD) approach. The POD operation refers to the laser source delivering pulses in sync with an external trigger whose frequency does not exceed the maximal available laser repetition rate [29][30][31][32][33]. To stabilize the output pulse energy, the laser resonator and/or amplification stages must be kept in equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Pulse-on-Demand Operation for Precise High-Speed UV Laser Microstructuring

Kočica

Mur

Didierjean³

et al. 2023

Micromachines

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Laser microstructuring has been studied extensively in the last decades due to its versatile, contactless processing and outstanding precision and structure quality on a wide range of materials. A limitation of the approach has been identified in the utilization of high average laser powers, with scanner movement fundamentally limited by laws of inertia. In this work, we apply a nanosecond UV laser working in an intrinsic pulse-on-demand mode, ensuring maximal utilization of the fastest commercially available galvanometric scanners at scanning speeds from 0 to 20 m/s. The effects of high-frequency pulse-on-demand operation were analyzed in terms of processing speeds, ablation efficiency, resulting surface quality, repeatability, and precision of the approach. Additionally, laser pulse duration was varied in single-digit nanosecond pulse durations and applied to high throughput microstructuring. We studied the effects of scanning speed on pulse-on-demand operation, single- and multipass laser percussion drilling performance, surface structuring of sensitive materials, and ablation efficiency for pulse durations in the range of 1–4 ns. We confirmed the pulse-on-demand operation suitability for microstructuring for a range of frequencies from below 1 kHz to 1.0 MHz with 5 ns timing precision and identified the scanners as the limiting factor even at full utilization. The ablation efficiency was improved with longer pulse durations, but structure quality degraded.

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1064-nm DFB laser diode modules applicable to seeder for pulse-on-demand fiber laser systems

Cited by 14 publications

References 24 publications

DFB diode seeded low repetition rate fiber laser system operating in burst mode

DFB diode seeded low repetition rate fiber laser system operating in burst mode

Synchronous tunable picosecond surface emitting lasers by optical gain-switching

Pulse-on-Demand Operation for Precise High-Speed UV Laser Microstructuring

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