Intensity noise in quantum-dot laser diodes

We present intensity noise studies of a self-organized InAs/GaAs quantum-dot laser. The noise power measured for the full emission spectrum was found to be smaller than that for separate longitudinal mode groups. This noise cancellation indicates that the intensity fluctuations of the mode groups were anticorrelated, with typical values of the normalized correlation coefficient of around −0.50. This surprisingly high value is not consistent with the model of the quantum-dot laser as an inhomogeneous ensemble of independent microlasers.

[1]  Mitsuru Sugawara,et al.  Light emission spectra of columnar-shaped self-assembled InGaAs/GaAs quantum-dot lasers: Effect of homogeneous broadening of the optical gain on lasing characteristics , 1999 .

[2]  E. Giacobino,et al.  Squeezing and intermode correlations in laser diodes. , 1995, Physical review letters.

[3]  Mohamed Henini,et al.  TEMPERATURE DEPENDENCE OF THE OPTICAL PROPERTIES OF INAS/ALYGA1-YAS SELF-ORGANIZED QUANTUM DOTS , 1999 .

[4]  John H. Marsh,et al.  Longitudinal mode grouping in InGaAs/GaAs/AlGaAs quantum dot lasers: origin and means of control , 1998 .

[5]  Haruhiko Kuwatsuka,et al.  Nonlinear processes responsible for nondegenerate four-wave mixing in quantum-dot optical amplifiers , 2000 .

[6]  M. Sugawara,et al.  Theoretical calculation of lasing spectra of quantum-dot lasers: effect of homogeneous broadening of optical gain , 2000, IEEE Photonics Technology Letters.

[7]  Skolnick,et al.  Electronic energy levels and energy relaxation mechanisms in self-organized InAs/GaAs quantum dots. , 1996, Physical review. B, Condensed matter.

[8]  Machida,et al.  Quantum correlation between longitudinal-mode intensities in a multimode squeezed semiconductor laser. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[9]  H. Sakaki,et al.  Multidimensional quantum well laser and temperature dependence of its threshold current , 1982 .

[10]  Peter Michael Smowton,et al.  Spectral analysis of InGaAs/GaAs quantum-dot lasers , 1999 .

[11]  Timothy C. Ralph,et al.  A Guide to Experiments in Quantum Optics , 1998 .

[12]  M. Hopkinson,et al.  Emission spectra and mode structure of InAs/GaAs self-organized quantum dot lasers , 1998 .

[13]  Marius Grundmann,et al.  The present status of quantum dot lasers , 1999 .

[14]  Freeman,et al.  Squeezed light from injection-locked quantum well lasers. , 1993, Physical review letters.

[15]  Machida,et al.  Amplitude squeezing in a pump-noise-suppressed laser oscillator. , 1986, Physical review. A, General physics.

[16]  M. Asada,et al.  Gain and the threshold of three-dimensional quantum-box lasers , 1986 .