High pulse power wavelength stabilized 905 nm laser bars for automotive LiDAR

Wenzel, H.; Klehr, A.; Liero, A.; Christopher, Heike; Fricke, J.; Maasdorf, A.; Zeghuzi, Anissa; Knigge, Andrea

doi:10.1109/hpd48113.2019.8938682

Cited by 12 publications

(7 citation statements)

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“…Line-scanning LiDAR systems employed for, for example, autonomous driving, require compact, reliable, and power-efficient light sources to allow for detection of objects at large distances. Gain switched diode lasers integrated with tailored electronic drivers, generating high pulse power with a few nanoseconds long current pulses with amplitudes up to 1 kA, are ideal candidates for such Li-DAR systems [3,4]. The commercialization of these diode lasers necessitates a further increase in detection range and, thus, higher pulse power and a minimization of the required pulse current amplitudes, which can be achieved by epitaxially stacking multiple active regions, separated by tunnel junctions [5][6][7][8][9].…”

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confidence: 99%

Wavelength‐stabilized ns‐pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions

Ammouri

Christopher

Fricke

et al. 2022

Electronics Letters

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The improvement of the performance of a distributed Bragg reflector laser bar emitting near 905 nm through the use of multiple epitaxially stacked active regions and tunnel junctions is reported. The bar consisting of 48 emitters (each having an aperture of 50 µm) emits an optical power of 2.2 kW in 8 ns long pulses at an injection current of 1.1 kA. This corresponds to an almost threefold increase of the pulse power compared to a bar with lasers having only a single active region. Due to the integrated surface Bragg grating, the bar exhibits a narrow spectral bandwidth of about 0.3 nm and a thermal tuning of only 68 pm/K.

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mentioning

confidence: 99%

Wavelength‐stabilized ns‐pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions

Ammouri

Christopher

Fricke

et al. 2022

Electronics Letters

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show abstract

“…Line-scanning LiDAR systems employed for, e.g., autonomous driving, require compact, reliable, and power-efficient light sources to allow for detection of objects at large distances. Gain switched diode lasers integrated with tailored electronic drivers, generating high pulse power with a few nanoseconds long current pulses with amplitudes up to 1 kA, are ideal candidates for such LiDAR systems [3,4]. The commercialization of these diode lasers necessitates a further increase in detection range and, thus, higher pulse power and a minimization of the required pulse current amplitudes, which can be achieved by epitaxially stacking multiple active regions, separated by tunnel junctions [5][6][7][8][9].…”

Section: Hosted Filementioning

confidence: 99%

Wavelength-stabilized ns-pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions

Ammouri

Christopher

Fricke

et al. 2022

Preprint

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The improvement of the performance of a distributed Bragg reflector laser bar emitting near 905 nm through the use of multiple epitaxially stacked active regions and tunnel junctions is reported. The bar consisting of 48 emitters (each having an aperture of 50 μm) emits an optical power of 2.2 kW in 8 ns long pulses at an injection current of 1.1 kA. This corresponds to an almost threefold increase of the pulse power compared to a bar with lasers having only a single active region. Due to the integrated surface Bragg grating, the bar exhibits a narrow spectral bandwidth of about 0.3 nm and a thermal tuning of only 68 pm/K.

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“…Peak Power Pulse Width Pulse per Second [7] 70 W 20 ns 30 kHz [8] 100 W 10 ns 10 kHz [9] 50 W 8 ns 10 kHz [10] 150 W 14 ns 1 kHz Drive circuit in this manuscript 135 W 2 ns 400 kHz…”

Section: Referencementioning

confidence: 99%

Modulated High Power and Narrow Pulse Width Laser Drive Circuit for Lidar System

et al. 2021

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This manuscript introduces a laser drive circuit for a light detection and ranging (Lidar) system. A Lidar system usually requires its drive circuit to provide laser pulses with nanosecond pulse width, > 100 W peak power and high repetition frequency. However, the existing research results show difficulties in meeting these requirements. In order to reduce the pulse width and increase the peak power of laser pulses, special circuit design and component selection are used to optimize the parasitic parameters of the drive circuit, and GaN devices are used to increase the switching speed. The characteristics of laser pulses are tested under different input voltage, pulse per second and switch conducting time. Meanwhile, the reasons for the changes in these characteristics are analyzed and explained. In order to meet the requirements of the Lidar system to detect targets at different distances, a modulation method to change the peak power of the laser pulse is proposed. In our experiment, ideally, the peak power of the laser pulse reaches 135 W, and the pulse width is less than 2 ns at a pulse per second rate of 400 kHz.

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High pulse power wavelength stabilized 905 nm laser bars for automotive LiDAR

Cited by 12 publications

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Wavelength‐stabilized ns‐pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions

Wavelength‐stabilized ns‐pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions

Wavelength-stabilized ns-pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions

Modulated High Power and Narrow Pulse Width Laser Drive Circuit for Lidar System

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