A5075315016- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Solid State Laser Technologies
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Laser Design and Applications
- Particle Accelerators and Free-Electron Lasers
- Spectroscopy and Laser Applications
- Advanced Fiber Optic Sensors
- Advanced Frequency and Time Standards
- Terahertz technology and applications
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced X-ray Imaging Techniques
- Gyrotron and Vacuum Electronics Research
- Laser-Plasma Interactions and Diagnostics
- Optical Coherence Tomography Applications
- Advanced Photonic Communication Systems
- Astronomical Observations and Instrumentation
- Photorefractive and Nonlinear Optics
- Particle accelerators and beam dynamics
- Astronomy and Astrophysical Research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Quantum optics and atomic interactions
- Retinal and Macular Surgery
Deutsches Elektronen-Synchrotron DESY
2015-2025
Universität Hamburg
2013-2025
Center for Free-Electron Laser Science
2013-2025
Hamburg Centre for Ultrafast Imaging
2016-2024
Max Planck Institute for the Structure and Dynamics of Matter
2013-2023
Massachusetts Institute of Technology
2007-2018
Cambridge Electronics (United States)
2007
Moscow Institute of Thermal Technology
2006
Karlsruhe University of Applied Sciences
2001
École Polytechnique Fédérale de Lausanne
1995-1996
Abstract In this paper the general correlation spectrum of an oscillator with white and f‐ αa noise sources is derived from Langevin equations describing deterministic stochastic behaviour by perturbation methods. treatment α influence finite measuring time on spectra are included in a domain calculation. theory applied to Van der Pol exhibiting parametric sideband amplification realized demonstrating applicability technically relevant circuits.
A balanced cross correlator, the optical equivalent of a microwave phase detector, is demonstrated. Its use in synchronizing an octave-spanning Ti:sapphire laser and 30-fs Cr:forsterite yields 300-attosecond timing jitter measured from 10 mHz to 2.3 MHz. The spectral overlap between two lasers strong enough permit direct detection difference carrier-envelope offset frequency lasers.
We have successfully demonstrated that an appropriately designed semiconductor saturable absorber device, the antiresonant Fabry-Perot absorber, can reliably start and sustain stable mode locking of solid state lasers such as Nd:YAG, Nd:YLF, Nd:Glass, Cr:LiSAF, Ti:sapphire lasers. Especially for with long upper-state lifetimes, previous attempts to produce self-starting passive absorbers was always accompanied by self-<i>Q</i>-switching. derive criteria characterize dynamic behavior in...
Submicrometer silicon photodiode waveguides, fabricated on silicon-on-insulator substrates, have photoresponse from <1270 to 1740 nm (0.8 AW <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> at 1550 nm) and a 3-dB bandwidth of 10 20 GHz. The p-i-n waveguide consists an intrinsic 500times250 where the optical mode is confined two thin, 50-nm-thick, doped Si wings that extend 5 mum out either side waveguide. wings, which are one p-type...
A general expression for the correlation spectrum of an oscillator, described by a set nonlinear ordinary differential equations with intrinsic noise sources, is derived first-order perturbation theory. The analytical derivations are well suited to numerical determination Poincare mapping methods. theory applied lumped circuit model Colpitts oscillator. It concluded that behavior complex oscillator circuits used in microwave engineering can be simulated method.< <ETX...
We demonstrate a self-starting 700 MHz repetition rate Yb:fiber laser incorporated with phase biased nonlinear amplifying loop mirror as an artificial saturable absorber.The delivers maximum power of 150 mW and pulse width 215 fs at pump 710 mW.The integration relative intensity noise (RIN) between 10 Hz results in minimum integrated RIN 0.015%.The the fundamental was also characterized different net-cavity dispersion.Although is made nonpolarization maintaining fiber, mode locking sustains...
We demonstrate the strong performance enhancement of an all-polarization-maintaining mode-locked fiber oscillator using a linear self-stabilized interferometer via suppression cross-phase modulation (XPM). Numerical simulations reveal that XPM significantly affects saturable absorber dynamics resulting in distortions steady-states and output pulse quality. For experimental verification, we construct with suppression, employing intra-cavity YVO 4 crystal to obtain differential walk-off effect...
Abstract CompactLight is a Design Study funded by the European Union under Horizon 2020 research and innovation funding programme, with Grant Agreement No. 777431. was conducted an International Collaboration of 23 international laboratories academic institutions, three private companies, five third parties. The project, which started in January 2018 duration 48 months, aimed to design innovative, compact, cost-effective hard X-ray FEL facility complemented soft source pave road for future...
Attosecond science has demonstrated that electrons can be controlled on the sub-cycle time scale of an optical waveform, paving way towards frequency electronics. However, these experiments historically relied high-energy laser pulses and detection not suitable for microelectronic integration. For practical electronics, a system integration capable generating detectable signals with low pulse energies is needed. While current from plasmonic nanoantenna emitters driven at frequencies, charge...
We present general guidelines for the design of ultrabroadband, high-energy optical parametric chirped-pulse amplifiers, where maximization both conversion efficiency and bandwidth simultaneous suppression superfluorescence is required. Using a semi-analytical approach together with numerical simulations, we find that ratio pump seed pulse durations critical parameter in temporal optimization, its optimum depends on amplifier gain. Multi-stage thus requires independent optimization chirp at...
CMOS compatible infrared waveguide Si photodiodes are made responsive from 1100 to 1750 nm by Si(+) implantation and annealing. This article compares diodes fabricated using two annealing temperatures, 300 475 degrees C. 0.25-mm-long annealed C have a response 1539 radiation of 0.1 A W-(-1) at reverse bias 5 V 1.2 W(-1) 20 V. 3-mm-long processed exhibited states, L1 L2, with photo responses 0.3 +/-0.1 0.7 +/-0.2 for the state 0.5 4 W(-1)-1 L2 state. The can be switched between L2. bandwidths...
We present a systematic study of Mach-Zehnder silicon optical modulators based on carrier-injection. Detailed comparisons between modeling and measurement results are made with good agreement obtained for both DC AC characteristics. A figure merit, static VpiL, as low 0.24Vmm is achieved. The effect carrier lifetime variation doping concentration explored found to be important the modulator
Abstract High-power tunable lasers are intensely pursued due to their vast application potential such as in telecom, ranging, and molecular sensing. Integrated photonics, however, is usually considered not suitable for high-power applications mainly its small size which limits the energy storage capacity and, therefore, output power. In late 90s, improve beam quality increase stored energy, large-mode-area (LMA) fibers were introduced optical mode area substantially large. Such LMA have...
Abstract High-power amplifiers are critical components in optical systems spanning from long-range sensing and communication to micromachining medical surgery. Today, integrated photonics with its promise of large reductions size, weight cost cannot be used these applications, owing the lack on-chip high-power amplifiers. Integrated devices severely output power their small which limits energy storage capacity. For past two decades, mode area (LMA) technology has played a disruptive role...
We present three Cr 3+ :Colquiriite lasers as low-cost alternatives to Ti:Sapphire laser technology.Single-mode diodes, which cost only $150 each, were used pump sources.In cw operation, with ∼520 mW of absorbed power, up 257, 269 and 266 output power slope efficiencies 53%, 62% 54% demonstrated for Cr:LiSAF, Cr:LiSGaF Cr:LiCAF, respectively.Record tuning ranges from 782 1042 nm 777 977 Cr:LiSGaF, 754 871 Cr:LiCAF demonstrated.In mode-locking experiments using semiconductor saturable...
Few-cycle pulse generation based on Ti:sapphire, Cr:forsterite, and Cr:YAG gain media is reviewed. The dynamics of these laser systems well understood in terms soliton dispersion managed formation stabilized by artificial saturable absorber action provided Kerr-lens modelocking. These generate 5-, 14-, 20-fs pulses with spectral coverages 600-1150, 1100-1600, 1200-1500 nm, respectively. design compensating optics providing high reflectivity prismless operation over this bandwidth discussed....
Searches for extrasolar planets using precision radial velocity (PRV) techniques are approaching Earth-like planet sensitivity, however require an improvement of one order magnitude to identify earth-mass in the habitable zone sun-like stars. A key limitation is spectrograph calibration. An astro-comb, octave-spanning laser frequency comb and a Fabry-Pérot cavity, producing evenly spaced frequencies with large wavelength coverage, promising tool improved We demonstrate calibration...
We study the relative intensity noise (RIN) and timing jitter of a Raman soliton. demonstrate that RIN an excitation pulse causes center-wavelength fluctuations resulting soliton which translates by fiber dispersion into (RTJ) between pulse. The soliton's absolute is dominated pulse's at low frequency RTJ high frequency. experimental reveals can be significantly reduced reducing accumulated (e.g., using less dispersive fibers with shorter length) experienced
We present a status update on the dedicated R\&D facility SINBAD which is currently under construction at DESY. The will host multiple independent experiments acceleration of ultra-short electron bunches and novel, high gradient methods. first experiment ARES-experiment with normal conducting 100\,MeV S-band linac its core. objectives this ranging from study compression techniques to sub-fs level application as injector for various advanced schemes e.g. plans use ARES test-site DLA in...
A theoretical investigation of the possibility achieving self-similar pulse propagation in a solid-state laser is presented. Limited group-velocity dispersion hinders true evolution, but an intermediate regime that exhibits some characteristic features (and offers benefits) can be reached. This operation potential to increase energy by at least order magnitude compared energies obtained usual Kerr-lens mode-locked lasers with anomalous dispersion. Ti:sapphire generate as high one microjoule...
We demonstrate a versatile dual-wavelength synchronous mode-locking of diode-pumped Cr:LiSAF laser for the first time, to our knowledge. A two-color mode-locked operation is achieved by using intracavity birefringent filters (BRFs) or etalons as frequency-selective elements. Using with different thicknesses and hence free spectral ranges (FSRs), wavelength separation in could be selected between 1 9 nm, corresponding beating frequencies 0.4–3.5 THz range. Moreover, central output tuned...
We incorporate two techniques into pre-chirp managed amplification (PCMA) to achieve high-energy ultrashort pulses with the duration well below 100 fs. Numerical simulations confirmed by our experimental results demonstrate that seeding PCMA circularly polarized instead of linearly can increase amplified pulse energy 1.5 times. also employ high-dispersion chirped mirrors compress throughput efficiency as high 98%. These allow us an Yb-fiber system emits 50-MHz, 47-fs 101.2-W average power.