Compact, CO2-stabilized tuneable laser at 2.05 microns
  We demonstrate a compact fibre-based laser system at 2.05 microns stabilized to a CO2 transition using frequency modulation spectroscopy of a gas-filled hollow-core fibre. The laser exhibits an absolute frequency accuracy of 5 MHz, a frequency stability noise floor of better than 7 kHz or 5e-11 and is tunable within +/-200 MHz from the molecular resonance frequency while retaining roughly this stability and accuracy. 
Philip G. Westergaard (1), Jan W. Thomsen (2), Martin R. Henriksen   (2), Mattia Michieletto (3), Marco Triches (1), Jens K....
physics.ins-det physics.optics