Abstract
We have measured the frequency chirp characteristics of single-longitudinal-mode InGaAsP semiconductor lasers operating at 1.3-and 1.5-μm wavelength and subjected to large-signal amplitude modulation in the 50-to 800-MHz range. The single-longitudinal-mode lasers were of the cleaved-coupled-cavity1 (C3) and the external-cavity type.2 The measured chirp width for 1.5-μm InGaAsP lasers is about a factor of 2 larger than that for 1.3-μm InGaAsP lasers of the same structure. The frequency chirping results from a modulation of the carrier density, which modulates the effective refractive index of the guided mode.
© 1984 Optical Society of America
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