Laser stabilized to a fiber interferometer with close-to-zero temperature sensitivity

Abstract

Ultra-stable laser sources typically achieve long-term frequency stability by locking to a bulky and costly vacuum-operated Fabry–Perot cavity made of ultra-low expansion material such as ultra-low expansion glass (ULE). In this work, we demonstrate that long-term stability can be achieved with a specially designed fiber interferometer operated at zero-temperature-sensitivity crossing point, a feature typically achieved only with cavities made from zero-expansion materials. The ultra-low temperature sensitivity is achieved by using a combination of a hollow-core optical fiber that provides the required delay and a short segment of a standard single-mode fiber that provides temperature compensation. Additionally, we placed the interferometer in an airtight aluminum enclosure to mitigate the effect of environmental pressure fluctuations. A laser locked to this interferometer exhibits ±550 kHz peak-to-peak frequency variation over 100 hours of continuous operation, and a frequency drift below 20 Hz/s. The corresponding Allan deviation reaches 2×10−14

More information

Identifiers

ORCID for Bo Shi: orcid.org/0000-0003-0895-3052

ORCID for Win Indra: orcid.org/0000-0003-3505-6728

ORCID for Francesco Poletti: orcid.org/0000-0002-1000-3083

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

Catalogue record

Export record

Altmetrics