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  1. Article ; Online: Misalignment-free, Kerr-lens-modelocked Yb:Y

    Ostapenko, Hanna / Feng, Ye / Lamour, Tobias / McCracken, Richard / Mandel, Oliver / Weise, Dennis / Reid, Derryck T

    Optics express

    2023  Volume 31, Issue 2, Page(s) 3249–3257

    Abstract: We present a fully bonded, misalignment-free, diode-pumped Yb:ceramic (Yb: ... ...

    Abstract We present a fully bonded, misalignment-free, diode-pumped Yb:ceramic (Yb:Y
    Language English
    Publishing date 2023-01-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.480767
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book ; Online: Compensation of front-end and modulation delays in phase and ranging measurements for time-delay interferometry

    Euringer, Philipp / Houba, Niklas / Hechenblaikner, Gerald / Mandel, Oliver / Soualle, Francis / Fichter, Walter

    2023  

    Abstract: In the context of the Laser Interferometer Space Antenna (LISA), the laser subsystems exhibit frequency fluctuations that introduce significant levels of noise into the measurements, surpassing the gravitational wave signal by several orders of magnitude. ...

    Abstract In the context of the Laser Interferometer Space Antenna (LISA), the laser subsystems exhibit frequency fluctuations that introduce significant levels of noise into the measurements, surpassing the gravitational wave signal by several orders of magnitude. Mitigation is achieved via time-shifting individual measurements in a data processing step known as time-delay interferometry (TDI). The suppression performance of TDI relies on accurate knowledge and consideration of the delays experienced by the interfering lasers. While considerable efforts have been dedicated to the accurate determination of inter-spacecraft ranging delays, the sources for onboard delays have been either neglected or assumed to be known. Contrary to these assumptions, analog delays of the phasemeter front end and the laser modulator are not only large but also prone to change with temperature and heterodyne frequency. This motivates our proposal for a novel method enabling a calibration of these delays on-ground and in-space, based on minimal functional additions to the receiver architecture. Specifically, we establish a set of calibration measurements and elucidate how these measurements are utilized in data processing, leading to the mitigation of the delays in the TDI Michelson variables. Following a performance analysis of the calibration measurements, proposed calibration scheme is assessed through numerical simulations. We find that in the absence of the calibration scheme, the assumed drifts of the analog delays increase residual laser noise at high frequencies of the LISA measurement band. A single, on-ground calibration of the analog delays leads to an improvement by roughly one order of magnitude, while re-calibration in space may improve performance by yet another order of magnitude. Towards lower frequencies, ranging error is always found to be the limiting factor for which countermeasures are discussed.

    Comment: 14 pages, 6 figures
    Keywords Physics - Instrumentation and Detectors ; Astrophysics - Instrumentation and Methods for Astrophysics
    Subject code 621
    Publishing date 2023-12-05
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Architecture and performance analysis of an optical metrology terminal for satellite-to-satellite laser ranging.

    Mandel, Oliver / Sell, Alexander / Chwalla, Michael / Schuldt, Thilo / Krauser, Jasper / Weise, Dennis / Braxmaier, Claus

    Applied optics

    2020  Volume 59, Issue 3, Page(s) 653–661

    Abstract: Interferometric laser ranging is an enabling technology for high-precision satellite-to-satellite tracking within the context of Earth observation, gravitational wave detection, or formation flying. In orbit, the measurement system is affected by ... ...

    Abstract Interferometric laser ranging is an enabling technology for high-precision satellite-to-satellite tracking within the context of Earth observation, gravitational wave detection, or formation flying. In orbit, the measurement system is affected by environmental influences, particularly satellite attitude jitter and temperature fluctuations, imposing an instrument design with a high level of thermal stability and insensitivity to rotations around the spacecraft center of mass. The new design concept presented here combines different approaches for dynamic heterodyne laser ranging and features the inherent beam-tracking capabilities of a retroreflector in a mono-axial configuration. It allows for a continuously adjustable distance between the optical bench and the location of its fiducial point, facilitating future inter-satellite tracking with nanometer accuracy, e.g., the next-generation gravity mission.
    Language English
    Publishing date 2020-03-26
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.378658
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Towards a space-qualified Kerr-lens mode-locked laser.

    Feng, Ye / Lamour, Tobias P / Ostapenko, Hanna / McCracken, Richard A / Mandel, Oliver / Weise, Dennis / Reid, Derryck T

    Optics letters

    2021  Volume 46, Issue 21, Page(s) 5429–5432

    Abstract: We report a 1.5-GHz Kerr-lens mode-locked (KLM) Yb: ...

    Abstract We report a 1.5-GHz Kerr-lens mode-locked (KLM) Yb:
    Language English
    Publishing date 2021-11-01
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.439965
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A phasemeter concept for space applications that integrates an autonomous signal acquisition stage based on the discrete wavelet transform.

    Ales, Filippo / Mandel, Oliver / Gath, Peter / Johann, Ulrich / Braxmaier, Claus

    The Review of scientific instruments

    2015  Volume 86, Issue 8, Page(s) 84502

    Abstract: We describe a phasemeter designed to autonomously acquire and track a heterodyne signal with low signal-to-noise ratio in a frequency band that spans from 1 MHz to 25 MHz. The background driving some of the design criterions of the phasemeter comes from ... ...

    Abstract We describe a phasemeter designed to autonomously acquire and track a heterodyne signal with low signal-to-noise ratio in a frequency band that spans from 1 MHz to 25 MHz. The background driving some of the design criterions of the phasemeter comes from studies on future space mission concepts such as orbiting gravitational wave observatories and next generation geodesy missions which all rely on tracking phasemeters in order to meet their mission goal. The phasemeter has been implemented within a field programmable gate array trying to minimize the requirement of computational resources and its performance has been tested using signal generators. Laboratory test has shown that the phasemeter is capable of locking to an input signal in less than half a millisecond, while its phase measurement accuracy is in the micro-radian range for measurement frequencies that span from mHz to Hz.
    Language English
    Publishing date 2015-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.4928489
    Database MEDical Literature Analysis and Retrieval System OnLINE

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