High-power, high-beam quality miniaturized diode laser module for direct material processing at 980 nm

Hildenstein, Philipp; Sahm, Alexander; Feise, D.; Jedrzejczyk, Daniel; Paschke, K.; Tränkle, G.

doi:10.1117/12.2578430

Cited by 2 publications

(1 citation statement)

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“…With new application scenarios such as spectral beam combining and coherent optical communication, high requirements have been put forward for the spectral width and wavelength tunability of semiconductor lasers [1,2]. For example, the absorption bandwidth of nonlinear crystals used for frequency conversion is usually less than 100 pm [3,4]; The pulse light source used in LiDAR systems requires wavelength drift to be controlled within a few nanometers within the temperature range of -40 ℃ to 85 ℃ [5,6]; The tunable laser in the near-infrared band is a key device in the field of biomedical optics [7,8].…”

Section: Introductionmentioning

confidence: 99%

Tunable narrow-linewidth monolithic master oscillator tapered power amplifier diode laser based on surface bragg gratings

Li,

He,

Zhou

et al. 2023

Eighteenth National Conference on Laser Technology and Optoelectronics

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In this paper, the tunable narrow spectral semiconductor laser technology based on on-chip DBR gratings is investigated. The surface DBR grating structure and electro-thermal tuning structure were designed, determined key parameters of grating structural, and the problem of multi-peak suppression was studied. Developed manufacturing technology for surface DBR gratings and tunable technology based on micro-electrode heaters and applied them to tapered MOPA laser chips, achieving output laser spectral locking while maintaining the high brightness of tapered semiconductor lasers. The tapered MOPA laser has achieved a narrow spectral width of 40 pm and a side mode suppression ratio of 35 dB under a continuous-wave power of 10.3 W. At a microelectrode heater current of 0.22 A, the wavelength can be continuously tuned over a range of 4.3 nm, with a maximum spectral width not exceeding 60 pm.

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Section: Introductionmentioning

confidence: 99%

Tunable narrow-linewidth monolithic master oscillator tapered power amplifier diode laser based on surface bragg gratings

Li,

He,

Zhou

et al. 2023

Eighteenth National Conference on Laser Technology and Optoelectronics

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Improving beam quality of tapered laser diodes by integrated metalens

Gong,

Wang,

Zhou

et al. 2023

J. Opt. Soc. Am. B

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High-power and high-beam-quality laser sources are required in numerous applications. Here, we theoretically investigate a tapered laser diode with integrated metalens, which can improve the lateral beam quality. By carefully designing the slot length and width at different lateral positions behind the front facet, the mode mismatch between the ridged cavity and the tapered cavity is overcome while ensuring high transmittance (>96%). The beam quality is greatly improved, and the lateral far-field divergence is reduced. The simulation results show that the lateral far-field divergence (second-moment level) decreases from 7.2° to 5.9°, and the M2 (second-moment level) decreases from 2.3 to 1.2. The proposed structure shows a good thermal stability in the simulation.

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High-power, high-beam quality miniaturized diode laser module for direct material processing at 980 nm

Cited by 2 publications

References 0 publications

Tunable narrow-linewidth monolithic master oscillator tapered power amplifier diode laser based on surface bragg gratings

Tunable narrow-linewidth monolithic master oscillator tapered power amplifier diode laser based on surface bragg gratings

Improving beam quality of tapered laser diodes by integrated metalens

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