Advanced phasemeter for deep phase modulation interferometry.

We present the development of an advanced phasemeter for the deep phase modulation interferometry technique. This technique aims for precise length measurements with a high dynamic range using little optical hardware. The advanced phasemeter uses fast ADCs and an FPGA to implement a design of multiple single-bin Fourier transforms running at high sampling rates. Non-linear noise sources in the design were analyzed and suppressed. A null measurement with an optical beatnote signal using λ = 1064nm was conducted. It showed a sensitivity of 0.8μrad/√Hz below 10Hz and 13.3μrad/√Hz above, with a large dynamic range. The shown performance could enable the measuring of optical path lengths with sensitivities down to 0.14pm/√Hz and 2.3pm/√Hz, respectively, over several fringes in an interferometric setup.

[1]  Karsten Danzmann,et al.  LISA technology - concept, status, prospects , 2003 .

[2]  P. Bender,et al.  Intersatellite range monitoring using optical interferometry. , 2008, Applied optics.

[3]  O. Sasaki,et al.  Sinusoidal phase modulating interferometer using optical fibers for displacement measurement. , 1988, Applied optics.

[4]  K. Danzmann,et al.  The LTP experiment on the LISA Pathfinder mission , 2005, gr-qc/0504062.

[5]  John Vanderkooy,et al.  Quantization and Dither: A Theoretical Survey , 1992 .

[6]  Ricardo Tokio Higuti,et al.  Wide dynamic range homodyne interferometry method and its application for piezoactuator displacement measurements. , 2013, Applied optics.

[7]  O. Sasaki,et al.  Sinusoidal phase modulating interferometer using the integrating-bucket method. , 1987, Applied optics.

[8]  O. Sasaki,et al.  Sinusoidal phase modulating interferometry for surface profile measurement. , 1986, Applied optics.

[9]  Tian Xinguang,et al.  DDFS spurious signals due to amplitude quantization in absence of phase-accumulator truncation , 2009 .

[10]  Ulrich Johann,et al.  Successful testing of the LISA Technology Package (LTP) interferometer engineering model , 2005 .

[11]  Karsten Danzmann,et al.  Verification of polarising optics for the LISA optical bench. , 2012, Optics express.

[12]  K. Danzmann,et al.  Deep phase modulation interferometry. , 2010, Optics express.

[13]  Daniel A. Shaddock,et al.  Overview of the LISA Phasemeter , 2006 .