20.06.2018 - 13:00

7th OCL-TP Workshop

On 7-8th October, the 7th International Workshop between the "Optical Communication Lab" and the Department "Technological Physics" took place under framework of long-term cooperation agreement between the Israel Institute of Technology and the University of Kassel.


10.04.2018 - 12:00


Monolithic cointegration of QD-based InP on SiN as a versatile platform for the demonstration of high performance and low cost PIC transmitters (MOICANA)


28.02.2016 - 16:54 article in the „Physik in unserer Zeit“

A recent open-access article by research partners from the BMBF Research Network project entitled "Sichere Kommunikation per Quantenrepeater" is published in "Physik in unserer Zeit", which reports on the current state and the main challenges in this field.



"fs pulse generation by MIXSEL (modelocked integrated external cavity surface emitting laser) based on quantum dot gain and absorber elements"

Semiconductor based light sources are the most efficient light emitting devices and have successfully been used for a huge variety of applications. However, there are still areas, where the semiconductor approach is not fully exploited. Although semiconductor lasers are dominating the market for optical communication, for the new generation of high-capacity coherent communication, frequency comb generation is mainly based on bulky conventional solid-state or fiber lasers due to the difficulties to combine supercontinuum generation with high enough peak powers. However, based on an integrated concept of vertical external cavity surface emitting lasers (VECSEL) with a semiconductor saturable absorbing mirror (SESAM), which forms a so-called mode-locked integrated external-cavity surface emitting laser (MIXSEL), there is a realistic chance to realize a semiconductor based very compact ultra-short high-power fs laser source for frequency comb generation in the optical domain. In particular by using quantum dot (QD) gain and absorber material, the material properties can be tailored over a wide range by additional geometry based degrees of freedom, which should allow to design and operate MIXSEL on the sweet spot of device operation optimizing the device performance well beyond existing technologies.


Joint project in frame of DFG international research group (D-A-CH + Israel) with ETH Zürich, Switzerland and with Israel Institute of Technology, Technion, Haifa.

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