Multiwavelength DFB laser array with integrated spot sizeconverters

摘要

We describe the design, fabrication, and performance of anfive-element quarterwave-shifted distributed feedback laser array withnmonolithically integrated spot size converters intended for use as anmultiple-wavelength source in dense wavelength-divisionntelecommunications systems. Facet power in excess of 10 mW with lessnthan 150 mA bias and longitudinal side mode suppression greater than 40ndB were routinely achieved. Narrow far-field full-width at half-maximumnangles of 6.9°×16.3° provided 3.5-dB coupling loss intonsingle-mode fiber with 1.0-dB misalignment tolerances of ±2.0nΜm. With ±10°C thermal tuning, 22 1555-nm channels spacednby 50 GHz were accessed with this device. Thorough field evaluationnindicates that such a device is consistent with manufacturingnrequirements