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Temperature and current coefficients of lasing wavelength in tunable diode laser spectroscopy

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Abstract

The factors determining temperature and current coefficients of lasing wavelength are investigated and discussed under monitoring CO2-gas absorption spectra. The diffusion rate of Joule heating at the active layer to the surrounding region is observed by monitoring the change in the junction voltage, which is a function of temperature and the wavelength (frequency) deviation under sinusoidal current modulation. Based on the experimental results, the time interval of monitoring the wavelength after changing the ambient temperature or injected current (scanning rate) has to be constant at least to eliminate the monitoring error induced by the deviation of lasing wavelength, though the temperature and current coefficients of lasing wavelength differ with the rate.

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Authors and Affiliations

  1. Toyohashi University of Technology, 1-1, Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan

    M. Fukuda, T. Mishima & N. Nakayama

  2. Optoelectronic Industry and Technology Development Association (OITDA), Sumitomo Edogawabashiekimae Bldg., 7F, 1-20-10, Sekiguchi, Bunkyo, Tokyo, 112-0014, Japan

    T. Masuda

Authors
  1. M. Fukuda
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  2. T. Mishima
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  3. N. Nakayama
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  4. T. Masuda
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Correspondence to M. Fukuda.

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Fukuda, M., Mishima, T., Nakayama, N. et al. Temperature and current coefficients of lasing wavelength in tunable diode laser spectroscopy. Appl. Phys. B 100, 377–382 (2010). https://doi.org/10.1007/s00340-009-3878-0

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  • DOI: https://doi.org/10.1007/s00340-009-3878-0

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