Rb-stabilized laser at 1572 nm for CO2 monitoring

8th Symposium on Frequency Standards and Metrology 2015

Matthey, R.^1 ; Moreno, W.^1 ; Gruet, F.^1 ; Brochard, P.^1 ; Schilt, S.^1 ; Mileti, G.^1

Laboratoire Temps-Fréquence, Institut de Physique, Université de Neuchâtel, Neuchâtel, Switzerland^1

关键词: Electrooptical modulators;    Fabry-Perot cavity;    Frequency combs;    Optical frequency combs;    Optical frequency references;    Spectral coverage;    Stabilized lasers;    Wavelength regions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012034/pdf
DOI  :  10.1088/1742-6596/723/1/012034

来源: IOP

【 摘 要 】

We have developed a compact rubidium-stabilized laser system to serve as optical frequency reference in the 1.55-μm wavelength region, in particular for CO2monitoring at 1572 nm. The light of a fiber-pigtailed distributed feedback (DFB) laser emitting at 1560 nm is frequency-doubled and locked to a sub-Doppler rubidium transition at 780 nm using a 2-cm long vapor glass cell. Part of the DFB laser light is modulated with an electro-optical modulator enclosed in a Fabry-Perot cavity, generating an optical frequency comb with spectral coverage extending from 1540 nm to 1580 nm. A second slave DFB laser emitting at 1572 nm and offset-locked to one line of the frequency comb shows a relative frequency stability of 1.10-11at 1 s averaging time and -12from 1 hour up to 3 days.