High dynamic range spatial mode decomposition.

  title={High dynamic range spatial mode decomposition.},
  author={A. W. Jones and M. Wang and Conor M Mow-Lowry and Andreas Freise},
  journal={Optics express},
  volume={28 7},
An accurate readout of low-power optical higher-order spatial modes is of increasing importance to the precision metrology community. Mode sensors are used to prevent mode mismatches from degrading quantum and thermal noise mitigation strategies. Direct mode analysis sensors (MODAN) are a promising technology for real-time monitoring of arbitrary higher-order modes. We demonstrate MODAN with photo-diode readout to mitigate the typically low dynamic range of CCDs. We look for asymmetries in the… 
Metasurface-enhanced spatial mode decomposition
Aaron W. Jones , 2, ∗ Mengyao Wang, † Xuecai Zhang , Samuel J. Cooper , Shumei Chen , Conor M. Mow-Lowry , 6, 7 and Andreas Freise 1, 6, 7 Institute for Gravitational Wave Astronomy, School of
Meta-Material Enhanced Spatial Mode Decomposition
Acquiring precise information about the mode content of a laser is critical for multiplexed optical communications, optical imaging with active wave-front control, and quantum-limited


Advanced Virgo: a 2nd generation interferometric gravitational wave detector
Advanced Virgo is the project to upgrade the Virgo interferometric detector of gravitational waves, with the aim of increasing the number of observable galaxies (and thus the detection rate) by three
Increasing the Astrophysical Reach of the Advanced Virgo Detector via the Application of Squeezed Vacuum States of Light.
The squeezing injection was fully automated and over the first 5 months of the third joint LIGO-Virgo observation run O3 squeezing was applied for more than 99% of the science time, and several gravitational-wave candidates have been recorded.
Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy.
During the ongoing O3 observation run, squeezed states are improving the sensitivity of the LIGO interferometers to signals above 50 Hz by up to 3 dB, thereby increasing the expected detection rate by 40% and 50% respectively.
High-performance phase camera as a frequency selective laser wavefront sensor for gravitational wave detectors.
A high-performance phase camera is designed, built and tested, which can observe laser wavefronts in a large range of sideband frequencies and fits the requirements for control loops in Advanced Virgo.
Atmospheric pollution profiles in Mexico City in two different seasons
A CO2-laser-based photoacoustic spectrometer was used to determine the temporal concentration profile of atmospheric ethene in Mexico City. Ethene measurements were conducted at the facilities of our
Alignment locking to suspended Fabry-Perot cavity
In this paper we report on the alignment locking of an in vacuum 77 m long suspended mirror Fabry-Perot cavity. Lock was achieved by mode-matching a 500 mW Nd:YAG NPRO onto a pre-mode cleaner, the
BRIEF COMMUNICATIONS: Synthesis of spatial filters for investigation of the transverse mode composition of coherent radiation
A method was developed for the synthesis of spatial filters on a computer. Such filters can be used to analyze the transverse mode composition of coherent electromagnetic radiation.
Space-division multiplexing in optical fibres
This Review summarizes the simultaneous transmission of several independent spatial channels of light along optical fibres to expand the data-carrying capacity of optical communications. Recent
Levenberg--Marquardt algorithm: implementation and theory
A robust and efficient implementation of a version of the Levenberg--Marquardt algorithm is discussed and it is shown that it has strong convergence properties.