Spectroscopic use of a novel blue diode laser in a wavelength region around 450�nm. Burns, I., Hult, J., & Kaminski, C. Applied Physics B: Lasers and Optics, 79(4):491-495, 7, 2004.
Spectroscopic use of a novel blue diode laser in a wavelength region around 450�nm [pdf]Paper  Spectroscopic use of a novel blue diode laser in a wavelength region around 450�nm [link]Website  abstract   bibtex   
This paper reports on the first spectroscopic appli- cation of a novel type of GaN blue diode laser emitting around 450 nm, which has recently become available. The diode was characterised and then implemented in an extended cavity, to achievemode-hop free tuning over a frequency range exceeding 105 GHz. The spectroscopic utility of the device was demon- strated by probing the 5 2P3/2 to 6 2S1/2 transition of atomic indium seeded to an atmospheric pressure flame. Single scans over the pressure broadened hyperfine structure were recorded with high signal-to-noise ratios and profiles of the indium LIF distribution through the flame were acquired, at a high spa- tial resolution. Potential applications of diodes emitting in this spectral region range from industrial sensing to atomic cooling experiments.

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