Cavity mode-width spectroscopy with widely tunable ultra narrow laser.

We explore a cavity-enhanced spectroscopic technique based on determination of the absorbtion coefficient from direct measurement of spectral width of the mode of the optical cavity filled with absorbing medium. This technique called here the cavity mode-width spectroscopy (CMWS) is complementary to the cavity ring-down spectroscopy (CRDS). While both these techniques use information on interaction time of the light with the cavity to determine absorption coefficient, the CMWS does not require to measure very fast signals at high absorption conditions. Instead the CMWS method require a very narrow line width laser with precise frequency control. As an example a spectral line shape of P7 Q6 O₂ line from the B-band was measured with use of an ultra narrow laser system based on two phase-locked external cavity diode lasers (ECDL) having tunability of ± 20 GHz at wavelength range of 687 to 693 nm.

[1]  J. Hodges,et al.  Frequency-agile, rapid scanning spectroscopy: absorption sensitivity of 2 × 10−12 cm−1 Hz−1/2 with a tunable diode laser , 2014 .

[2]  P. Masłowski,et al.  Low pressure line-shape study of self-broadened CO transitions in the (3←0) band , 2013 .

[3]  David A. Long,et al.  Effects of incomplete light extinction in frequency-agile, rapid scanning spectroscopy , 2013, Defense, Security, and Sensing.

[4]  J. Hodges,et al.  Frequency-agile, rapid scanning spectroscopy , 2013, Nature Photonics.

[5]  J. Guéna,et al.  Experimental realization of an optical second with strontium lattice clocks , 2013, Nature Communications.

[6]  R. Ciuryło,et al.  Ultra-Narrow Laser for Optical Frequency Reference , 2012 .

[7]  J. Hodges,et al.  High-signal-to-noise-ratio laser technique for accurate measurements of spectral line parameters , 2012 .

[8]  Lei Chen,et al.  A sub-40-mHz-linewidth laser based on a silicon single-crystal optical cavity , 2011, Nature Photonics.

[9]  R. Ciuryło,et al.  Line-shape study of self-broadened O{sub 2} transitions measured by Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectroscopy , 2011 .

[10]  H Abe,et al.  Pound-Drever-Hall-locked, frequency-stabilized cavity ring-down spectrometer. , 2011, The Review of scientific instruments.

[11]  David A. Long,et al.  Frequency-stabilized cavity ring-down spectroscopy , 2010 .

[12]  D. Wineland,et al.  Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place , 2008, Science.

[13]  S. Briaudeau,et al.  Direct determination of the Boltzmann constant by an optical method. , 2007, Physical review letters.

[14]  Maxwell W. Libbrecht,et al.  Interferometric measurement of the resonant absorption and refractive index in rubidium gas , 2006 .

[15]  T Zelevinsky,et al.  Narrow line photoassociation in an optical lattice. , 2006, Physical review letters.

[16]  Gang Li,et al.  The HITRAN 2008 molecular spectroscopic database , 2005 .

[17]  Barbara A. Paldus,et al.  An historical overview of cavity-enhanced methods , 2005 .

[18]  M. Takamoto,et al.  An optical lattice clock , 2005, Nature.

[19]  J. Hodges,et al.  Automated high-resolution frequency-stabilized cavity ring-down absorption spectrometer , 2005 .

[20]  Jun Ye,et al.  Narrow line cooling and momentum-space crystals , 2004, physics/0407021.

[21]  J. Hodges,et al.  Frequency-stabilized single-mode cavity ring-down apparatus for high-resolution absorption spectroscopy , 2004 .

[22]  M. Matsushita,et al.  Development of Phase-lock System between Two Single-Mode Lasers for Optical-Optical Double Resonance Spectroscopy , 1999 .

[23]  Motoichi Ohtsu,et al.  Highly sensitive detection of molecular absorption using a high finesse optical cavity , 1994 .

[24]  John L. Hall,et al.  Laser phase and frequency stabilization using an optical resonator , 1983 .