A5023657821- Photonic and Optical Devices
- Orbital Angular Momentum in Optics
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Semiconductor Lasers and Optical Devices
- Laser-Matter Interactions and Applications
- Mechanical and Optical Resonators
- Plasmonic and Surface Plasmon Research
- Advanced Fiber Laser Technologies
- Optical Coatings and Gratings
- Quantum Mechanics and Applications
- Semiconductor Quantum Structures and Devices
- Strong Light-Matter Interactions
- Thermal Radiation and Cooling Technologies
- Neural Networks and Reservoir Computing
- Advanced Fiber Optic Sensors
- Ocular and Laser Science Research
- Advanced MEMS and NEMS Technologies
- Laser Material Processing Techniques
- Solid State Laser Technologies
University of Twente
2023-2025
Russian Quantum Center
2020-2023
Skolkovo Institute of Science and Technology
2020-2022
In paraxial approximation, the electromagnetic eigenmodes inside an optical microresonator can be derived from a Schrödinger-type eigenvalue problem. this framework, tilting cavity mirrors introduces linear term to potential energy of system. our paper, we apply solution strategies for inverse problems precisely determine and control relative orientation two forming microcavity. Our approach employs inversion Schrödinger equation reconstruct effective landscape, thus mirror tilts, observed...
Gain-switched lasers are in demand numerous quantum applications, particularly, systems of key distribution and various optical random number generators. The reason for this popularity is natural phase randomization between gain-switched laser pulses. idea such has become so familiar that most authors use it without regard to the features operation mode they use. However, at high repetition rates pulses or when generated a bias current close threshold, condition may be violated. This paper...
A record-high efficiency and bandwidth for a fiber-to-chip grating coupler have been achieved with robust design cost-effective fabrication on silicon-on-insulator platform. The optimization involves the usual geometrical parameters, period, fill factor, mode matching fiber output grating. measured coupling TE polarization 1 dB are -2.64 (54 %) per 67 nm, respectively. 3 exceeds 100 fully covering C + L band. results gap between theory experimental realization in existing literature.
Abstract Random number generators (RNGs) are an essential ingredient of modern cryptographic systems. Particular attention is paid today to a special class RNGs – quantum RNGs, which attracting close researchers due the explosive development key distribution systems, where use randomness necessary security requirement. A large various entropy sources have been proposed over last 10-15 years. Most them based on different optics phenomena, particularly, effects occurring in semiconductor...
The dependence of the semiconductor laser wavelength on pump current is a well-known phenomenon, which generally attributed to change in refractive index active layer due carrier injection. This effect usually considered be drawback as it causes frequency chirping pulses produced via direct modulation. Here, we show that at high values thermal resistance diode, lasing red-shifted caused by and this shift may significantly exceed (in absolute value) blue related induced We propose benefit...
Abstract The addition of an optically absorptive layer to otherwise standard dielectric mirrors enables a set laser direct writing nanostructuring methods that can add functionality such while retaining their high reflectivity. A thorough characterization this method is given in paper, and its physical origins are investigated. In particular, these measurements show has reversible permanent component. process originates from the thermal expansion surface allows simple yet precise way...
Direct phase modulation via optical injection is a newly developed method for coding the of gain-switched laser, which meets high requirements placed on transmitters quantum key distribution: compactness, low losses, compatibility with CMOS technologies, and absence undesirable effects leading to side-channel information leakage. Despite successful implementation good prospects further development this system, there still lack theoretical investigations scheme in literature. Here, first...
In paraxial approximation, the electromagnetic eigenmodes inside an optical microresonator can be derived from a Schr\"odinger-type eigenvalue problem. this framework, tilting cavity mirrors effectively introduces linear potential to system. our work, we apply solution strategies for inverse problems precisely determine and control relative orientation of two forming microcavity. Our approach employs inversion Schr\"odinger equation reconstruct effective landscape, thus mirror tilts,...
Gain-switched lasers are in demand numerous quantum applications, particularly, systems of key distribution and various optical random number generators. The reason for this popularity is natural phase randomization between gain-switched laser pulses. idea such has become so familiar that most authors use it without regard to the features operation mode they use. However, at high repetition rates pulses or when generated a bias current close threshold, condition may be violated. This paper...
The dependence of the semiconductor laser wavelength on pump current is a well-known phenomenon, which generally attributed to change in refractive index active layer due carrier injection. This effect usually considered be drawback as it causes frequency chirping pulses produced via direct modulation. Here, we show that at high values thermal resistance diode, lasing red-shifted caused by and this shift may significantly exceed (in absolute value) blue related induced We propose benefit...