LPL - Laboratoire de Physique des Lasers

Metrology, Molecules and Fundamental Tests (MMT)

The group Metrology, Molecules and Fundamental Tests is performing ultra-high resolution molecular spectroscopy in the near and middle infrared and optical frequency metrology. The main experimental projects are the following:


Compact frequency comb

Frédéric Du-Burck, Vincent Roncin, Amine Chaouche Ramdane (PhD)


The aim of this research project, recently initiated, is to explore applications of semiconductor self-pulsating lasers in the field of frequency metrology for metrological applications needing compact systems. Those sources spontaneously emit a frequency comb thanks to a passive mode locking due to an efficient four-wave mixing mechanism induced by carrier density modulation. We have developed a setup for frequency stability characterization based on two transfer cavities (a confocal cavity and a ring fibered cavity) referenced to an ultra-stable optical signal from Syrte laboratory (Observatoire de Paris) send via an optical fiber. Thereby, we have external cavity laser diode (ECLD) tunable over 100 nm with a frequency stability of 200 Hz over more than 1000 seconds (10-12).


The studied self-pulsating source is a InGaAs based quantum dash mode-locked laser diode (QD-MLLD). Its optical spectrum extends over 10 nm around 1550 nm. Its repetition rate is about 10 GHz. We have shown that the frequency stability of a stabilized ECLD can be transferred to one mode of the QD-MLLD comb by optical injection assisted by optoelectronic stabilization: the mode linewidth is divided by a factor 1000 (from 50 MHz to 50 kHz) and the long-term stability is that of the master laser. Moreover, we recently showed that this stability is transferred to all the modes of the QD-MLLD laser comb.



Frédéric Du-BurckVincent Roncin



  1. Pierre Grüning , Amine Chaouche Ramdane, Vincent Roncin and Frédéric Du-Burck,
    Frequency Stability Transfer demonstration at 1.5µm over 80 nm with an All-Fibered Ring Cavity,
    Soumis à Optics Letter.
  2. Amine Chaouche Ramdane, Pierre Grüning, Vincent Roncin, and Frédéric Du-Burck,
    Compact Metrological Frequency Comb Stabilized with Optical Injection Locking Assisted by Long-term Optoelectronic Correction,
    CLEO EUROPE 2017 / Novel sensing schemes, CH-4 Oral presentation.
  3. Amine Chaouche Ramdane, Pierre Grüning, Vincent Roncin, and Frédéric Du-Burck,
    Frequency Stability Transfer by Optical Injection Locking into a Semiconductor Frequency Comb,
    EFTF 2017 / Optical Frequency Standards and Applications II Poster session C3P-L.
  4. A. C. Ramdane, P. Grüning, V. Roncin & F. Du-Burck,
    Stability transfer at 1.5 μm for metrological applications using a commercial optical cavity,
    Applied Optics, 56 (1), 8-14, (2017).
  5. Pierre Gruning, Amine Chaouche-Ramdane, Min Lee, Vincent Roncin, Frédéric Du-Burck, Stéphane Trebaol, Pascal Besnard,
    Stabilisation et reduction de la largeur de raie d’un laser accordable autour de 1,55 μm avec une cavite en anneau fibrée et référencée,
    Journées Nationales d’Optique Guidées, Optique Bordeaux 2016, 4-7 juillet 2016.
  6. Amine Chaouche Ramdane, Pierre Grüning, Vincent Roncin et Frédéric Du-Burck,
    Transfert de stabilité au moyen d’une cavité,
    COLOQ, 4-7 juillet 2016, Bordeaux.
  7. Amine Chaouche Ramdane, Vincent Roncin et Fréderic Du-Burck,
    Stabilisation d’un peigne de fréquences issu d’un laser fabry-perot a semiconducteurs à base de bâtonnets quantiques,
    Optique Bretagne 2015, Rennes 6-9 juillet 2015.
  8. Amine Chaouche Ramdane, Vincent Roncin, Fabrice Senotier, Alexandre Shen et Féderic Du Burck,
    Premiers résultats sur la réduction de la largeur des modes optiques de lasers auto-impulsionnels à base de semi-conducteurs à 1,55 μm,
    34èmes Journées Nationales d’Optique Guidée (JNOG2014) Nice 29-31 octobre 2014.

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