Coherence transfer from 1064 nm to 578 nm using an optically referenced frequency comb

Fang, Shun; Jiang, Yanyi; Chen, Haiqin; Yao, Yuan; Bi, Zhiyi; Ma, Lei

doi:10.1088/1674-1056/24/7/074202

Cited by 6 publications

(1 citation statement)

References 34 publications

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“…The clock laser CL1 in Yb1 is frequency stabilized to a thermal-noise-limited ULE cavity with finesse of ~6.7 × 10 5 . The laser linewidth is reduced to ~1 Hz and it exhibits a fractional frequency instability of 1.3 × 10 −15 at 1 s averaging time 44 , 45 . We implement a tight phase locking between CL2 and cavity-stabilized CL1 (Fig.…”

Section: Methodsmentioning

confidence: 99%

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Gao

Zhou

Han

et al. 2018

Sci Rep

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Optical clocks are the most precise measurement devices. Here we experimentally characterize one such clock based on the 1S0-3P0 transition of neutral 171Yb atoms confined in an optical lattice. Given that the systematic evaluation using an interleaved stabilization scheme is unable to avoid noise from the clock laser, synchronous comparisons against a second 171Yb lattice system were implemented to accelerate the evaluation. The fractional instability of one clock falls below 4 × 10−17 after an averaging over a time of 5,000 seconds. The systematic frequency shifts were corrected with a total uncertainty of 1.7 × 10−16. The lattice polarizability shift currently contributes the largest source. This work paves the way to measuring the absolute clock transition frequency relative to the primary Cs standard or against the International System of Units (SI) second.

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Section: Methodsmentioning

confidence: 99%

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Gao

Zhou

Han

et al. 2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

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Selection and amplification of a single optical frequency comb mode for laser cooling of the strontium atoms in an optical clock

Liu

Yin

Kong

et al. 2015

Applied Physics Letters

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In this paper, we report on the active filtering and amplification of a single mode from an optical femtosecond laser comb with mode spacing of 250 MHz by optical injection of two external-cavity diode lasers operating in cascade to build a narrow linewidth laser for laser cooling of the strontium atoms in an optical lattice clock. Despite the low injection of individual comb mode of approximately 50 nW, a single comb line at 689 nm could be filtered and amplified to reach as high as 10 mW with 37 dB side mode suppression and a linewidth of 240 Hz. This method could be applied over a broad spectral band to build narrow linewidth lasers for various applications.

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Towards generation of millihertz-linewidth laser light with 10−18 frequency instability via four-wave mixing

Jin

Hang

Jiang

et al. 2019

Applied Physics Letters

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Laser light with spectral purity and frequency stability is pursued in precision spectroscopy and precision measurements. We propose a scheme to generate millihertz-linewidth laser light with a frequency instability of 10−18 via optical four-wave mixing in alkaline-earth atoms. We show that the linewidth of the mixing laser light is ultimately limited by the natural linewidth of the atomic transition rather than by the linewidth of the input lasers. The frequency stability of the mixing laser light depends largely on the intensity stability of the input lasers. It is possible to generate a millihertz-linewidth laser light with a frequency instability of 10−18 and a power of 10−12 W when the input lasers with a relative intensity instability of 10−4 and a spectral width of 1 Hz interact with strontium (Sr) atoms with a density of 1 × 1011 cm−3.

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Coherence transfer from 1064 nm to 578 nm using an optically referenced frequency comb

Cited by 6 publications

References 34 publications

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Selection and amplification of a single optical frequency comb mode for laser cooling of the strontium atoms in an optical clock

Towards generation of millihertz-linewidth laser light with 10−18 frequency instability via four-wave mixing

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