World's most narrowband diode laser on a chip
|Researchers of the Laser Physics and Nonlinear Optics group developed, in collaboration with researchers of the Lionix Company, the world’s most narrowband diode laser on a chip exhibiting a quantum limited spectral bandwidth of less than 300 Hz. This laser concept represents a breakthrough in the fast-growing field of photonics, and will bring applications such as 5G internet and accurate GPS closer (see also UT Press release).|
Light particles in a pin-ball machine
Dutch national quality newspaper "NRC" published a one-page article in the science section on our recent article in Phys. Rev. A on "Programmable two-photon quantum interference in 10^3 channels in opaque scattering media".
Quantum physics inside a drop of paint
Inside a drop of paint, light is scattered so often that it seems impossible to demonstrate quantum effects. But despite the thousands of possible paths the light can take, like a drunk person inside a labyrinth, researchers of the University of Twente now show that there are just two exits. Depending on the light pattern that enters the paint, two photons always come out through the same exit, or through different ones – as though they avoid each other. The scientists of UT’s MESA+ Institute for Nanotechnology publish about these remarkable findings in the Physical Review A journal.
First programmable photonic processing module (Optica, 2, 10, 854-859 (2015))
Integrated microwave photonics, an emerging technology combining radio frequency (RF) engineering and integrated photonics, has great potential to be adopted for wideband analog processing applications. We use a grid of tunable Mach–Zehnder couplers interconnected in a two-dimensional mesh network, to demonstrate for the first time a programmable photonic processing unit with a free spectral range of 14 GHz to enable RF filters featuring continuous and variable passband shaping ranging from a 55 dB extinction notch filter to a 1.6 GHz bandwidth flat-top filter.