Abstract
Among the many factors(1) considered as influencing the longitudinal mode spectra of diode lasers are inhomogeneous broadening(2), lateral charge inhomogeneity(3), intensity induced longitudinal charge periodicity(4) and spontaneous emission driving the longitudinal modes(5). Our results show that spontaneous emission suffices to explain the experimental results for well-behaved homogeneously broadened lasers operating in a single transverse mode. These include spectral envelope narrowing which occurs as a laser is pumped from well below to well above threshold and the differences between real refractive index and gain-guided lasers.
© 1982 Optical Society of America
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