High-resolution measurement of the free spectral range of an etalon

Knight, P. Douglas; Cruz-Cabrera, Alvaro Augusto; Bergner, Brent C.

doi:10.1117/12.451810

Cited by 5 publications

(2 citation statements)

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“…Several methods to determine ν ∆ FSR for this purpose have been reported. For once, it can be directly measured by observing the transmission spectrum while tuning the incident laser wavelength [18,19,20]. The precision of such an approach is typically limited to ⋅ − 4 10 6 by the resolution of the optical spectrum analyser [20].…”

Section: Measurement Science and Technologymentioning

confidence: 99%

Dual-frequency comb generation with differing GHz repetition rates by parallel Fabry–Perot cavity filtering of a single broadband frequency comb source

Mildner

Meiners-Hagen

Pollinger

2016

Meas. Sci. Technol.

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We present a dual-comb-generator based on a coupled Fabry-Perot filtering cavity doublet and a single seed laser source. By filtering a commercial erbium-doped fiber-based optical frequency comb with CEO-stabilisation and 250 MHz repetition rate, two broadband coherent combs of different repetition rates in the GHz range are generated. The filtering doublet consists of two Fabry-Perot cavities with a tunable spacing and Pound-Drever-Hall stabilisation scheme. As a prerequisite for the development of such a filtering unit, we present a method to determine the actual free spectral range and transmission bandwidth of a Fabry-Perot cavity in situ. The transmitted beat signal of two diode lasers is measured as a function of their tunable frequency difference. Finally, the filtering performance and resulting beat signals of the heterodyned combs are discussed as well as the optimisation measures of the whole system.

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Section: Measurement Science and Technologymentioning

confidence: 99%

Dual-frequency comb generation with differing GHz repetition rates by parallel Fabry–Perot cavity filtering of a single broadband frequency comb source

Mildner

Meiners-Hagen

Pollinger

2016

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…High precision free spectral range measurement is important to match the wavelength grid to communication channels. Current methods generally rely on analyzing the transmission of the etalon via an optical spectrum analyzer [2][3][4] . Such methods are generally quite simple and precise enough but limited by the resolution of the spectrum analyzer.…”

Section: Introductionmentioning

confidence: 99%