LISA long-arm interferometry

Thorpe, James

doi:10.1088/0264-9381/27/8/084008

Cited by 20 publications

(15 citation statements)

References 31 publications

(45 reference statements)

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“…As a result, the phasemeter on the transponder records a constant 10 MHz tone, while the beat note on the master additionally contains twice the Doppler shift. This is different from the dual one-way ranging system employed by the MWI, but similar to the laser interferometry envisaged for LISA [22]. An analysis of the optical pathlengths shown in Figure 2 reveals that the effectively measured quantity is x 1 + x 2 + x 3 + x 4 + x 2 + x 5 = 2(d 1 + d 2 + x 2 ) = 2L, i.e.…”

Section: Lri Components and Designmentioning

confidence: 83%

In-Orbit Performance of the GRACE Follow-on Laser Ranging Interferometer

Abich¹,

Abramovici²,

Amparan³

et al. 2019

Phys. Rev. Lett.

212

158

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The Laser Ranging Interferometer (LRI) instrument on the Gravity Recovery and Climate Experiment (GRACE) Follow-On mission has provided the first laser interferometeric range measurements between remote spacecraft, separated by approximately 220 km. Autonomous controls that lock the laser frequency to a cavity reference and establish the 5 degree of freedom two-way laser link between remote spacecraft succeeded on the first attempt. Active beam pointing based on differential wavefront sensing compensates spacecraft attitude fluctuations. The LRI has operated continuously without breaks in phase tracking for more than 50 days, and has shown biased range measurements similar to the primary ranging instrument based on microwaves, but with much less noise at a level of 1 nm/ √ Hz at Fourier frequencies above 100 mHz.

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Section: Lri Components and Designmentioning

confidence: 83%

In-Orbit Performance of the GRACE Follow-on Laser Ranging Interferometer

Abich¹,

Abramovici²,

Amparan³

et al. 2019

Phys. Rev. Lett.

212

158

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“…With a knowledge of the arm lengths at about 1 m accuracy, the laser source needs to be 'pre-stabilized' a a level of about 10 −12 / √ Hz, using a ultra-stable Fabry-Perot cavity [30].…”

Section: Au Sunmentioning

confidence: 99%

Status of the eLISA on table (LOT) electro-optical simulator for space based, long arms interferometers

et al. 2015

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We report on the progress in the realization of an electronic / optical simulator for space based, long arm interferometry and its application to the eLISA mission. The goal of this work is to generate realistic optics and electronics signals, especially simulating realistic propagation delays. The first measurements to characterize the simulator are also presented. With the present configuration, noise reduction factors of 5×107 for optical beat notes and 109 for RF beat notes have been achieved using the Time Delay Interferometry algorithm. The principle of the experiment has been validated and further work is ongoing to identify the residual noise sources and optimize the apparatus. Experimental Astronomy Experimental Astronomy Look Inside Other actions Export citation Register for Journal Updates About This Journal Reprints and Permissions Add to Papers Share Share this content on Facebook Share this content on Twitter Share this content on LinkedI

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“…It is scheduled to be launched into space in 2034 as a European Space Agency L3 mission. [13][14][15][16] Its technology demonstration mission, LISA pathfinder, was launched at the end of 2015, successfully paving the way for LISA by demonstrating the key technologies. 17 Similar to LISA, Chinese space mission-Taiji, the interferometer arm length of which is 3 million km, initiated by the Chinese Academic of Sciences in 2008, plans to be launched in 2033.…”

Section: Introductionmentioning

confidence: 99%

Principle demonstration of the phase locking based on the electro-optic modulator for Taiji space gravitational wave detection pathfinder mission

Liu

Dong²,

Gao

et al. 2018

Opt. Eng.

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Weak-light phase locking is a key technology for Taiji space gravitational wave detection and its pathfinder mission. Previously, the phase locking was achieved by a complicated technique, which controls the frequency of the laser via a piezo-electric actuator (kHz range or more) and a temperature actuator (sub-Hz range). We propose an easy phase-locking strategy, which is based on the electro-optic modulator (EOM). Compared with the traditional way, this strategy only needs to modulate the driven voltage of the EOM, and the frequency bandwidth can cover all ranges. An experiment is also established to prove the feasibility of the method. The results show that the noises are <80 μrad∕Hz 1∕2 in frequencies from 0.2 to 1 Hz, and the thermal drift is the main noise source in our recent system.

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LISA long-arm interferometry

Cited by 20 publications

References 31 publications

In-Orbit Performance of the GRACE Follow-on Laser Ranging Interferometer

In-Orbit Performance of the GRACE Follow-on Laser Ranging Interferometer

Status of the eLISA on table (LOT) electro-optical simulator for space based, long arms interferometers

Principle demonstration of the phase locking based on the electro-optic modulator for Taiji space gravitational wave detection pathfinder mission

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