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Intensity noise and polarization stability of GaAlAs-GaAs surface emitting lasers

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3 Author(s)
F. Koyama ; Tokyo Inst. of Technol., Yokohama, Japan ; K. Morito ; K. Iga

The intensity noise characteristics of GaAlAs-GaAs vertical cavity surface emitting (SE) lasers have been investigated. A low-intensity noise of -145 dB/Hz was obtained with an output power of 2.2 mW. The spontaneous emission factor is estimated to be 2×10-5, both from the bias dependence of the intensity noise and from the relative mode intensity below threshold. This is in good agreement with theoretical expectation. The possibility of low-noise operation of a microcavity SE laser with an extremely low output power of less than ~100 μW is shown. The polarization stability of the surface emitting laser is demonstrated by measuring the intensity fluctuations of an individual polarization state

Published in:

IEEE Journal of Quantum Electronics  (Volume:27 ,  Issue: 6 )