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A review will be given on the latest development of 1.55 µm quantum dot lasers. Static and dynamic properties of short cavity ridge waveguide lasers will be presented exhibiting data rates up to 22 GBit/s. The impact of structural and operational parameters will be discussed and compared with a simulation model. High-resolution linewidth measurements of distributed feedback lasers indicate with <...
We report progress on the development of a new technique that has the potential to enable the vacuum deposition of OLEDs with feature sizes ≤ 20um, and hence high resolution OLED displays. An OLED device with 16um by 130um sub-pixel size has been successfully demonstrated utilizing the novel idea of the in-situ shadow mask patterning method showing the capability of this method to achieve high resolution...
Modal gain characterization of mid-infrared semiconductor optical amplifiers intended for an active-passive integration platform is presented. Measured gain profiles reveal the peak values at around 2.07µm and 3dB bandwidth up to 27nm.
An efficient all-fiber compact ∼ 50 cm long microstructured optical fiber-based 3–4.2 µm mid-IR light source with power conversion efficiency > 28% has been designed by exploiting FWM with Er3+-doped ZBLAN fiber as the pump.
Detectors that take full advantage of the energy confinement offered by surface waves could have significant performance advantages in dark current and optical functionality. We use a subwavelength patterned metal nanoantenna structure to convert incoming plane waves to these surface waves.
We review high power semiconductor laser development at the Ferdinand-Braun-Institut, focusing on studies to improve material quality, design development for peak performance in standard structures and the development of novel device concepts for new applications.
We utilize high power VCSEL arrays for several applications where high efficiency especially at high operating temperatures is essential. Our approach to design VCSEL devices optimized for the requirements of these applications is presented.
Selective thermal emitters with a metallic 2D photonic crystal structure, such as shown in Fig. 1a), have been demonstrated to control the thermal emission spectrum of selective emitters for thermophotovoltaic applications [1]. Traditionally, tungsten has been the metal of choice for thermal emitters due to their natural thermal emission selectivity to wavelengths > 2µm and high melting temperatures...
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