Engineering topics
Klipstein, W.
Publications and source records attributed to Klipstein, W..
Flight Phasemeter on the Laser Ranging Interferometer on the GRACE Follow-On Mission
As the first inter-spacecraft laser interferometer, the Laser Ranging Interferometer (LRI) on the GRACE Follow-On Mission will demonstrate interferometry technology relevant to the LISA mission. This paper focuses on the completed LRI Laser Ranging Processor (LRP), which includes heterodyne signal phase tracking at µcycle/vHz precision, differential wavefront sensing, offset frequency phase locking and Pound-Drever-Hall laser stabilization. The LRI design has characteristics that are similar to those for LISA: 1064nm NPRO laser source, science bandwidth in the mHz range, MHz-range intermediate frequency and Doppler shift, detected optical power of tens of picoWatts. Laser frequency stabilization has been demonstrated at a level below 30 Hz/vHz, better than the LISA requirement of 300 Hz/vHz. The LRP has completed all performance testing and environmental qualification and has been delivered to the GRACE Follow-On spacecraft. The LRI is poised to test the LISA techniques of tone-assisted time delay interferometry and arm-locking. GRACE Follow-On launches in 2017.
Design concept for microwave interrogation structure in PARCS
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Production and characterization of a dual-species cold atomic beam
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Phase modulation for reduced vibration sensitivity in laser-cooled clocks in space
The standard interrogation technique in atomic beam clocks is square-wave frequency modulation (SWFM), which suffers a first order sensitivity to vibrations as changes in the transit time of the atoms translates to perceived frequency errors. Square-wave phase modulation (SWPM) interrogation eliminates sensitivity to this noise.
Development of flight technology for future laser-cooled space clocks
In this paper we report on the development of flight technologies to be used in space-based, laser-cooled atomic clocks scheduled to fly on the International Space Station.
Development of Flight Technology for Future Laser-Cooled Space Clocks
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The Laser Cooling and Atomic Physics (LCAP) Program at JPL
We present an overview of the Laser Cooling and Atomic Physics (LCAP) program.
Development of Flight Technology for Future Laser-Cooled Space Clocks
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