A four-channel multielectrode distributed-feedback (DFB) laser array in the 1.5-μm wavelength region was studied. In this wavelength-tunable single-frequency-laser array, InGaAsP/InP lasers with buried heterostructure (BH) were fabricated by metalorganic vapor-phase epitaxy (MOVPE) and liquid-phase epitaxial (LPE) hybrid growth on an n-type InP substrate with first-order uniform corrugation. The lasing wavelengths of the four lasers were between 1.5519 and 1.5524 μm at a uniform current injection state under DC operation of 3-mW output power. The lasing wavelength of each DFB laser was varied by changing the current ratio of one electrode to another. The tunable wavelength ranges of the four lasers were 0.3, 0.4, 0.4, and 1.2 nm. Thermal wavelength turbulence by changing the current for the nearest neighboring laser was 0.4 angstrom/mA (0.5 GHz/mA) when the stem temperature was controlled at 20 ± 0.1°C. The simultaneous lasing spectra obtained with scanning Fabry-Perot interferometer measurement are shown.
|Title of host publication||Opt Fiber Commun Conf 1988 Tech Dig Ser Vol 1 Summ Pap|
|Publisher||Publ by Optical Soc of America|
|Number of pages||1|
|Publication status||Published - 1988 Dec 1|
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