From the contents: D.J. Hamilton, M.G.D. Nix, S.G. Baran, G. Hancock, A.J. Orr-Ewing: Optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS) in a ring cavity.- T. Tsai, G.Wysocki: External-cavity quantum cascade lasers with fast wavelength scanning.- B. Hinkov, F. Fuchs,Q.K.Yang, J.M. Kaster, W. Bronner, R. Aidam, K. Köhler, J.Wagner: Time-resolved spectral characteristics of external-cavity quantum cascade lasers and their application to stand-off detection of explosive.- M. Rahim, A. Khiar, F. Felder,M. Fill, H. Zogg, M.W. Sigrist: 5-mim vertical external-cavity surface-emitting laser (VECSEL) for spectroscopic applications.- B. Grouiez, V. Zeninari, L. Joly, B. Parvitte: Pulsed quantum-cascade-laser spectroscopy with intermediate-size pulses: application to NH 3 in the 10 mim region.- L. Nähle, P. Fuchs, M. Fischer, J. Koeth, A. Bauer, M. Dallner, F. Langer, S. Höfling, A. Forchel: Mid infrared interband cascade lasers for sensing applications.- M. Guinet, A.W.Mantz, D.Mondelain: Performance of a 12.49 meter folded path copper Herriott cell designed for temperatures between 296 and 20 K.- A.V. Gorelik, A.L. Ulasevich, F.N. Nikonovich, M.P. Zakharich, V.A. Firago, N.S. Kazak,V.S. Starovoitov: Miniaturized resonant photoacoustic cell of inclined geometry for trace-gas detection.- J. Hodgkinson, D.Masiyano, R.P. Tatam: Gas cells for tunable diode laser absorption spectroscopy employing optical diffusers. Part 1: single and dual pass cells.- D. Masiyano, J.Hodgkinson, R.P. Tatam: Gas cells for tunable diode laser absorption spectroscopy employing optical diffusers. Part 2: Integrating spheres.- D. Hofstetter, F.R.Giorgetta, E. Baumann, Q. Yang, C.Manz, K. Köhler: Mid-infrared quantum cascade detectors for applications in spectroscopy and pyrometry.- S. Schilt,K. Zogal, B.Kögel, P.Meissner, M. Maute, R. Protasio,M.-C. Amann: Spectral and modulation properties of a largely tunable MEMS-VCSEL in view of gas phase spectroscopy applications.- J. Chen, A. Hangauer, R. Strzoda, M.-C. Amann: Tunable diode laser spectroscopy with optimum wavelength scanning.