I am a former student of the "Ecole Normale Supérieure" of Cachan (1972-1976). I received the aggregation of physics in 1976. I almost carried out all my researcher at LIPhy (ex LSP), part of my PhD ("Thèse d'Etat") at LASIM (Lyon) and a year at MIT (Cambridge, the United States). LIPhy, laboratory with interdisciplinary vocation, gave me the opportunity me to focus my work in several research area: I moved successively from solid state physics, to molecular physics and finally to optics. I have studied in my thesis of 3rd cycle the structural phase transitions by non-linear optics (order-parameter in NH4Cl crystal by generation of second harmonic and electro-optical effect). Then I joined the CNRS in section "atoms and molecules, optics and lasers, hot plasmas" (1978). I carried out a PhD in molecular physics (partly at LASIM in Lyon). I studied in my thesis the hyperfine interactions in diatomic molecules by sub-Doppler spectroscopy and highlighted for the first time the "gerade-ungerade" symmetry breaking by hyperfine interactions. The study of new phenomena in diatomic molecules with our experimental techniques proving limited, I was then interested in a topic initiated by Maurice Lombardi: the dynamics and statistics of very excited vibrational states. During two stays in the group of R.W. Field at MIT (one year in 1985-1986 and two months in 1988), I was interested in the correspondence between classical chaos and quantum chaos in SEP spectra of polyatomic molecules, highlighted for the first time in the SEP spectra of C2H2 molecule by statistical Fourier transform. I then set-up experiments and continued these studies at the laboratory on CS2 molecule. Following our development of the CuHBr (HyBrId) laser and a visit of astronomers of the CRAL and IPAG, I started in 1996 a collaboration within the framework of laser guide star: initially polychromatic (ELPOA/OHP/CRAL) then monochromatic (CLOE/CFHT). I proposed and developed in 2002 a Frequency Shifted Feedback (FSF) laser for astronomy to optimize and increase the magnitude of the sodium star. Since the end of this program (2011) I am working on potential applications of FSF lasers. I have just patented a dual-wavelength laser optically locked on iodine molecular PR rotational doublets; this laser can run in two modes (high resolution dual-lines or dual-FSF).