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Photonics & Quantum Communication

AIT's Photonics & Quantum Communication Laboratory at the Center for Digital Safety & Security deals with technologies based on the use of light. The activities of the research group Physical Layer Security in this laboratory range from photonically integrated circuits at chip level to system integration of optical and electronic components and the demonstration of new applications in telecommunications, quantum optics and sensor technology. The research laboratory has at its disposal a wide range of instruments for optical and high-frequency signal generation and analysis - from nanometers to terahertz.

Instrumentation & Lab Components:

Coherent metro-access UDWDM test-bed: optical multi-format transmitters and coherent / IM/DD receivers, optical amplifiers (SOA, EDFA) and remotely pumped reach extenders for C- and L-band, passive ROADM and resilience switch, various optical network components (filters, A/D nodes, switches, circulators, splitters, etc.), various electrical RF components (low-noise and high-power (linear) amplifiers, various filters and equalisers, multipliers, variable attenuators, etc.), 300 km standard single-mode fibre stack.

 

Instrumentation: 16GHz / 80GS/s Real-time scope, various sampling scopes, high-resolution optical and electrical spectrum analysers, vector network analyser, 12.5 Gb/s pulse pattern generator and BER tester, narrow-linewidth tunable lasers, 40 GHz mode-locked laser, single-photon avalanche photo detectors, demonstrators for quantum key distribution, 1.2 to 6 GHz real-time software-defined radio test-set.

 

Characterisation facilities for photonic integrated circuits: Piezo-stabilised optical probe station for optoelectronic chips (for butt- and vertical light coupling), beam profiler, various free-space optical components and mounts.

 

Network Infrastructure:

40 km field-deployed urban fibre link, optical comb generator for 32 channels in C-and L-band, various GbE modules at all CWDM wavelengths from 1270 to 1610 nm.

 

Modelling, Design and Simulation:

Custom Matlab algorithms for different photonic components and optical subsystems, state-of-the-art PCB development and FPGA simulation tools, custom simulation tools for RF components, signal processing algorithms and real-time implementation for software-defined radio.

 

For the further instrumentation we use synergies with the Radio Frequency Lab, also located in the Center for Digital Safety & Security.