Temperature and current accelerated lifetime conditions and testing of laser diodes for ESA BepiColombo space mission

Klumel, Genady; Karni, Yoram; Cohen, Shalom; Rech, Markus; Weidlich, Kai

doi:10.1117/12.874863

Cited by 5 publications

(3 citation statements)

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“…The LD is sensitive to temperature and current stress based on fault tree analysis, failure mechanism and effect analysis. An Arrhenius type model can be used for LD aging test with temperature stress, and a power law type model can be used for LD aging test with current stress [12] . However, in the experimental aging process, the influence of current and temperature on the laser is inseparable, and the current through the LD will generate heat.…”

Section: Reliable Physical Model For Accelerated Aging Of Gan -Based Ldmentioning

confidence: 99%

Research on Degradation Characteristics of GaN-based LD

Zhang

Liao

Wang

et al. 2022

J. Phys.: Conf. Ser.

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In recent years, GaN-based semiconductor laser diode(LD) have become an ideal light source for laser display, because of their high power and unique luminous wavelength. However, there is a challenge about reliability of GaN-based LD in industrial application. In this paper, an accelerated aging test is conducted on the same group of GaN-based LD at a high current of 4.1A. The degradation rate of GaN-based LD is obtained by least square method. Besides, the optical characteristics and low frequency electrical noise of LD are analysed after degradation. The results show that the lasing wavelength and low frequency electrical noise of GaN-based LD will increase after degradation. This helps to provide experimental reference for degradtion research of GaN-based LD.

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Section: Reliable Physical Model For Accelerated Aging Of Gan -Based Ldmentioning

confidence: 99%

Research on Degradation Characteristics of GaN-based LD

Zhang

Liao

Wang

et al. 2022

J. Phys.: Conf. Ser.

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“…During short "hot" phases, the junction temperatures may rise to ≈340 K (67°C). The activation energy E a 0.46 0.23 eV is in the normal range for III-V single quantum-well diode lasers and has been studied in more detail elsewhere [51]. Further tests at increased diode laser currents up to 150 A have been performed to demonstrate safe operation at increased diode laser drive currents of 100 A needed for the BELA application [51].…”

Section: A Space Qualification Of the Pump Diode Lasersmentioning

confidence: 99%

“…The wear-out lifetime τ of the LDAs R-8 by SCD has been experimentally established from dedicated accelerated life tests at various increased operation temperatures and at several elevated electrical drive currents [51]. The tests at different temperatures lead to the so-called activation energy E a in eV.…”

Section: A Space Qualification Of the Pump Diode Lasersmentioning

confidence: 99%

Space-qualified laser system for the BepiColombo Laser Altimeter

et al. 2013

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The space-qualified design of a miniaturized laser for pulsed operation at a wavelength of 1064 nm and at repetition rates up to 10 Hz is presented. This laser consists of a pair of diode-laser pumped, actively q-switched Nd:YAG rod oscillators hermetically sealed and encapsulated in an environment of dry synthetic air. The system delivers at least 300 million laser pulses with 50 mJ energy and 5 ns pulse width (FWHM). It will be launched in 2017 aboard European Space Agency's Mercury Planetary Orbiter as part of the BepiColombo Laser Altimeter, which, after a 6-years cruise, will start recording topographic data from orbital altitudes between 400 and 1500 km above Mercury's surface.

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