Optical injection locking-based amplification in phase-coherent transfer of optical frequencies

Abstract

We demonstrate the use of an optical injection phase locked loop (OIPLL) as a regenerative amplifier for optical frequency transfer applications. The optical injection locking provides high gain within a narrow bandwidth (<100MHz ) and is capable of preserving the fractional frequency stability of the incoming carrier to better than 10^-18 at 1000 s. The OIPLL was tested in the field as a mid-span amplifier for the transfer of an ultrastable optical carrier, stabilized to an optical frequency standard, over a 292km long installed dark fiber link. The transferred frequency at the remote end reached a fractional frequency instability of less than 1×10^-19 at averaging time of 3200 s.

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Identifiers

ORCID for David J. Richardson: orcid.org/0000-0002-7751-1058

ORCID for Radan Slavík: orcid.org/0000-0002-9336-4262

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