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Article Dans Une Revue Nature Photonics Année : 2010

Phase-locking of a 2.7-THz quantum cascade laser to a mode-locked erbium-doped fibre laser

Résumé

Mode-locked femtosecond lasers have revolutionized the field of optical metrology by allowing the realization of ultra-stable phase-coherent links between the optical-frequency domain and the radiofrequency range. In this work we have used the electro-optic effect in ZnTe (ref. 5) to demonstrate that the frequency and the phase of a 2.7 THz quantum cascade laser can be actively stabilized to the nth harmonic of the 90 MHz repetition rate (frep) of a commercial, mode-locked erbium-doped fibre laser. The beating between the stabilized quantum cascade laser frequency and the harmonic of frep yield a signal-to-noise ratio of 80 dB in a bandwidth of 1 Hz. The technique is inherently broadband, that is, it is applicable to any quantum cascade laser source provided that its frequency falls within the spectral bandwidth of the femtosecond laser (~5 THz). Furthermore, it is an ideal tool with which to control the phase of different quantum cascade lasers using light and compact fibre technology rather than superconducting bolometer mixers.

Dates et versions

hal-03733011 , version 1 (21-07-2022)

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Stefano Barbieri, Pierre Gellie, Giorgio Santarelli, Lu Ding, Wilfried Maineult, et al.. Phase-locking of a 2.7-THz quantum cascade laser to a mode-locked erbium-doped fibre laser. Nature Photonics, 2010, 4, pp.636-640. ⟨10.1038/nphoton.2010.125⟩. ⟨hal-03733011⟩
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