title: Narrow linewidth two-electrode 1560 nm laterally coupled distributed feedback lasers with third-order surface etched gratings.
abstract: We report on the design and characterization of a re-growth free InGaAsP/InP multiple quantum well two-electrode laterally coupled distributed feedback (LC-DFB) lasers. Third-order surface etched gratings have been defined on the ridge sidewalls along the laser cavity by means of stepper lithography. The lasers oscillate in single-mode around 1560 nm with high side mode suppression ratios (>52 dB), a wavelength tuning (≥ 3nm), an output power (≥ 6 mW), and narrow linewidth (<170 kHz) under various current injection ranges at room temperature. A minimum linewidth of 94 kHz has been recorded for 1500 µm-long two-electrode LC-DFB laser while providing non-uniform current injection through the two electrodes. The effect of the width of the inter-electrode gap on these different performance measures is also studied.
authors.forename: Kais
authors.initials: K
authors.lastname: Dridi
authors.forename: Abdessamad
authors.initials: A
authors.lastname: Benhsaien
authors.forename: Jessica
authors.initials: J
authors.lastname: Zhang
authors.forename: Karin
authors.initials: K
authors.lastname: Hinzer
authors.forename: Trevor J
authors.initials: TJ
authors.lastname: Hall