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Approaches for higher power in GaAs-based broad area diode lasers
/en/research/publications/approaches-for-higher-power-in-gaas-based-broad-area-diode-lasers
We present here a comparison of design approaches for improved continuous wave electro optical performance in GaAs-based high power broad area diode lasers emitting at 970 nm. Diode lasers with…
The QUEEN mission to demonstrate an optical Rb frequency reference payload and advanced small satellite platform technology
/en/research/publications/the-queen-mission-to-demonstrate-an-optical-rb-frequency-reference-payload-and-advanced-small-satellite-platform-technology
The QUEEN mission is a microsatellite mission aimed at the demonstration of an optical frequency reference payload and advanced small satellite platform technology in orbit. Following the continuous…
Thermal boundary resistance between GaAs and p-side metal as limit to high power diode lasers
/en/research/publications/thermal-boundary-resistance-between-gaas-and-p-side-metal-as-limit-to-high-power-diode-lasers
Studies are presented on the anomalously high thermal boundary resistance observed in efficient high power diode lasers between the p-side contact and metal submount. This barrier is responsible for…
Traveling-wave simulations of broad-area lasers
/en/research/publications/traveling-wave-simulations-of-broad-area-lasers
We present a physics-based tool for the numerical simulation of high-power broad-area edge-emitting diode lasers that self consistently couples heat transport to a dynamic electro-optical model. Due…
Coherent beam combining of tapered amplifiers unde QCW regime
/en/research/publications/coherent-beam-combining-of-tapered-amplifiers-unde-qcw-regime
We demonstrate the coherent beam combining of four high-brightness tapered amplifiers in quasi continuous wave operation. A maximum combined power of 22.7 W was achieved with > 64%…
High pulse power wavelength stabilized 905 nm laser bars for automotive LiDAR
/en/research/publications/high-pulse-power-wavelength-stabilized-905nbspnm-laser-bars-for-automotive-lidar
Key components of LiDAR (Light Detection and Ranging) systems, e.g., for autonomous driving and robotics are diode lasers capable of generating nanoseconds-long optical pulses with peak powers of…
Nanometrology: Absolute Seebeck coefficient of individual silver nanowires
/en/research/publications/nanometrology-absolute-seebeck-coefficient-of-individual-silver-nanowires
Thermoelectric phenomena can be strongly modified in nanomaterials. The determination of the absolute Seebeck coefficient is a major challenge for metrology with respect to micro- and nanostructures…
Shifted Excitation Raman Difference Spectroscopy with Charge-Shifting Charge-Coupled Device (CCD) Lock-In Detection
/en/research/publications/shifted-excitation-raman-difference-spectroscopy-with-charge-shifting-charge-coupled-device-ccd-lock-in-detection
Shifted excitation Raman difference spectroscopy (SERDS) can provide effective, chemically specific information on fluorescent samples. However, the restricted ability for fast alternating detection…
Performance Analysis of a Low-Noise, Highly Linear Distributed Amplifier in 500-nm InP/InGaAs DHBT Technology
/en/research/publications/performance-analysis-of-a-low-noise-highly-linear-distributed-amplifier-in-500-nm-inpingaas-dhbt-technology
This article is an extension of the previous report on an ultrawideband distributed amplifier (DA) in the InP double heterojunction bipolar transistor (DHBT) technology. With the choice of a tricode…
Determination of Sapphire Off-Cut and Its Influence on the Morphology and Local Defect Distribution in Epitaxially Laterally Overgrown AlN for Optically Pumped UVC Lasers
/en/research/publications/determination-of-sapphire-off-cut-and-its-influence-on-the-morphology-and-local-defect-distribution-in-epitaxially-laterally-overgrown-aln-for-optically-pumped-uvc-lasers
Herein, a systematic study of the morphology and local defect distribution in epitaxially laterally overgrown (ELO) AlN on c-plane sapphire substrates with different off-cut angles ranging from…