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Temperature-dependent electroluminescence of stressed and unstressed InAlGaN multi-quantum well UVB LEDs
/en/research/publications/temperature-dependent-electroluminescence-of-stressed-and-unstressed-inalgan-multi-quantum-well-uvb-leds
The electroluminescence of UVB light-emitting diodes emitting at 310 nm before and after 1000 h of operation is studied in the temperature range from 20 to 340 K. Before operation, the…
Modeling the electrical degradation of AlGaN-based UV-C LEDs by combined deep-level optical spectroscopy and TCAD simulations
/en/research/publications/modeling-the-electrical-degradation-of-algan-based-uv-c-leds-by-combined-deep-level-optical-spectroscopy-and-tcad-simulations
The long-term stability of ultraviolet (UV)-C light-emitting diodes (LEDs) is of major importance for many applications. To improve the understanding in this field, we analyzed the degradation of…
Degradation of AlGaN-based UV-C SQW LEDs analyzed by means of capacitance deep-level transient spectroscopy and numerical simulations
/en/research/publications/degradation-of-algan-based-uv-c-sqw-leds-analyzed-by-means-of-capacitance-deep-level-transient-spectroscopy-and-numerical-simulations
The lifetime of deep-ultraviolet light-emitting diodes (LEDs) is still limited by a number of factors, which are mainly related to semiconductor defects, and still need to be clarified. This paper…
234 nm far-ultraviolet-C light-emitting diodes with polarization-doped hole injection layer
/en/research/publications/234-nm-far-ultraviolet-c-light-emitting-diodes-with-polarization-doped-hole-injection-layer
Far-ultraviolet-C (far-UVC) light-emitting diodes (LEDs) with an emission wavelength of 234 nm with different polarization-doped AlGaN hole injection layers (HILs) are compared regarding their…
Low-loss SH-propagation in nanoscale AlGaAs-on-insulator waveguides for nonlinear quantum light sources operating with telecom wavelengths
/en/research/publications/low-loss-sh-propagation-in-nanoscale-algaas-on-insulator-waveguides-for-nonlinear-quantum-light-sources-operating-with-telecom-wavelengths
We report unprecedentedly low second harmonic band propagation losses in highly nonlinear AlGaAs-on-insulator waveguides pumped in the telecom L-band. These findings pave the way towards parametric…
Improvement of Lifetime of Semiconductor Optical Amplifiers for BECCAL
/en/research/publications/improvement-of-lifetime-of-semiconductor-optical-amplifiers-for-beccal
Improved laser facet passivation suppresses catastrophic optical mirror damage in 1064 nm and 767 nm ridge waveguide amplifiers. Accelerated lifetests reveal a reliability of more than 99% over the…
Carrier Non-pinning at Stripe Edges and Widened Far field in Broad-Area Lasers due to Longitudinal Temperature Variation
/en/research/publications/carrier-non-pinning-at-stripe-edges-and-widened-far-field-in-broad-area-lasers-due-to-longitudinal-temperature-variation
2D-in-plane spontaneous emission studies reveal lateral carrier-non-pinning linked to longitudinal temperature variation in 9xx-nm broad-area-lasers. Front-side non-pinning at the stripe edges…
Investigations on Amplification of Feedback in Single-Mode Ridge Waveguide Optical Amplifiers at 767nm
/en/research/publications/investigations-on-amplification-of-feedback-in-single-mode-ridge-waveguide-optical-amplifiers-at-767nm
We present an experimental setup to investigate the sensitivity of ridge waveguide semiconductor optical amplifiers to optical feedback. We determine the amplification in forward and backward…
Mechanical Simulation of A Hybrid Micro-Integrated Diode Laser Module Developed for Space-Borne Application
/en/research/publications/mechanical-simulation-of-a-hybrid-micro-integrated-diode-laser-module-developed-for-space-borne-application
We present the mechanical simulations of a compact laser module intended for space-borne application on a small satellite. The device is designed to withstand the 10+ grms random vibration without…
Bragg Grating Based Frequency Reference Module for Operation in Quantum Technology Applications
/en/research/publications/bragg-grating-based-frequency-reference-module-for-operation-in-quantum-technology-applications
We present the design of a novel Bragg grating based frequency reference with an expected frequency accuracy of 50MHz and a tuning range of more than 20GHz optimized for potassium-based quantum…