A high-coherence high-stability laser for the photonic local oscillator distribution of the Atacama Large Millimeter Array

Jean-Francois Cliche; Bill Shillue; Christine Latrasse; Michel Têtu; Larry R. D'Addario

doi:10.1117/12.580246

28 September 2004 A high-coherence high-stability laser for the photonic local oscillator distribution of the Atacama Large Millimeter Array

Jean-Francois Cliche, Bill Shillue, Christine Latrasse, Michel Têtu, Larry R. D'Addario

Author Affiliations +

Proceedings Volume 5489, Ground-based Telescopes; (2004) https://doi.org/10.1117/12.580246
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

We present the architecture and the characterization results of a Master Laser prototype that can be used to distribute a phase-coherent millimeter wave reference within the Atacama Large Millimeter Array. This source is obtained by frequency-locking a 1556-nm narrow linewidth DFB fiber laser to a two-photon transition in rubidium 85 at 778 nm after second harmonic generation in a non-linear waveguide crystal. The prototype yielded an absolute wavelength of 1556.210 843 nm, a stability of 2x10^-12 at tau = 1 s, a linewidth of 2 kHz over 1 ms, a coherence of 40% at 50 km over 1 ms, and a RIN below -145 dBc/Hz for f>10 MHz. Using this laser, the transmission of an 18.6 GHz reference over 10 km of fiber was achieved with a residual phase fluctuations lower than 0.22 degrees RMS (33 fs RMS) over 10 s.

Citation Download Citation

Jean-Francois Cliche, Bill Shillue, Christine Latrasse, Michel Têtu, and Larry R. D'Addario "A high-coherence high-stability laser for the photonic local oscillator distribution of the Atacama Large Millimeter Array", Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); https://doi.org/10.1117/12.580246

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