GaN blue diode lasers: a spectroscopist’s view
- Cite this article as:
- Leinen, H., Glässner, D., Metcalf, H. et al. Appl Phys B (2000) 70: 567. doi:10.1007/s003400050863
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We have characterized the spectroscopic properties of one of the first samples of blue-emitting diode lasers based on GaN. With such a laser diode operated inside a standard extended cavity arrangement we find a mode-hop free tuning range of more than 20 GHz and a linewidth of 10 MHz. Doppler-free spectroscopy on an indium atomic beam reveals the isotope shift between the two major indium isotopes as well as efficient optical pumping.