21 citations · 25 across the 11 of their papers we have counts for
11 papers
Mapping Source-Resolved Phase-Noise Transfer in Soliton Microcombs
Zhongan Zhao, Aleksandr Razumov, Viswanathan Sankar +2
Phase noise limits the coherence and stability of soliton microcombs, yet its origin is difficult to trace because multiple noise sources act simultaneously. It is often represente…
Subspace tracking: a novel measurement method to test the standard phase noise model of optical frequency combs
Darko Zibar, Holger Heebøll, Jasper Riebesehl +3
The introduction of digital signal processing (DSP) assisted coherent detection has been a cornerstone of modern fiber-optic communication systems. The ability to digitally, i.e. a…
Impact of nonlinear spectral broadening on the phase noise properties of electro-optic frequency comb
Aleksandr Razumov, Yijia Cai, Jasper Riebesehl +5
Electro-optic modulation is an attractive approach for generating flat, stable, and low-noise optical frequency combs with relatively high power per comb line. However, a key limit…
Extended Kalman Smoothing of Free Spin Precession Signals for Accurate Magnetic Field Determination
Jasper Riebesehl, Lutz Mertenskötter, Wiebke Pohlandt +2
We present a novel application of the Extended Kalman Smoother (EKS) for highly accurate frequency estimation from free spin precession signals of polarized He. Traditional app…
Fiber-coupled external cavity DFB-laser
David C. Nak, Jasper Riebesehl, Andreas Hemmerich
Narrow-linewidth, compact and robust laser systems are of high interest, especially with prospects for portable quantum metrological applications. We realized an external cavity DF…
Interference Fringe Mitigation in Short-Delay Self-Heterodyne Laser Phase Noise Measurements
Jasper Riebesehl, David C. Nak, Darko Zibar
Self-heterodyne techniques are widely used for laser phase noise characterization due to their simple experimental setup and the removed need for a reference laser. However, when i…
Resonant EO combs: Beyond the standard phase noise model of frequency combs
Holger R. Heebøll, Pooja Sekhar, Jasper Riebesehl +6
A resonant electro-optic (EO) frequency comb is generated through electro-optic modulation of laser light within an optical resonator. Compared to cavity-less EO combs generated in…
Phase Noise Characterization of Cr:ZnS Frequency Comb using Subspace Tracking
Aleksandr Razumov, Sergey Vasilyev, Mike Mirov +4
We present a comprehensive phase noise characterization of a mid-IR Cr:ZnS frequency comb. Despite their emergence as a platform for high-resolution dual-comb spectroscopy, detaile…
Digital Signal Processing Techniques for Noise Characterization of Lasers and Optical Frequency Combs: A Tutorial
Jasper Riebesehl, Holger R. Heebøll, Aleksandr Razumov +2
Performing noise characterizations of lasers and optical frequency combs on sampled data offers numerous advantages compared to analog measurement techniques. One of the main advan…
Subspace tracking for independent phase noise source separation in frequency combs
Aleksandr Razumov, Holger R. Heebøll, Mario Dummont +8
Advanced digital signal processing techniques in combination with ultra-wideband balanced coherent detection have enabled a new generation of ultra-high speed fiber-optic communica…
Quantum degenerate Fermi gas in an orbital optical lattice
M. Hachmann, Y. Kiefer, J. Riebesehl +2
Spin-polarized samples and spin mixtures of quantum degenerate fermionic atoms are prepared in selected excited Bloch bands of an optical chequerboard square lattice. For the spin-…