Abstract
A new distributed feedback laser, the heteroepitaxial ridge-overgrown distributed feedback (HRO DFB) laser, is proposed and demonstrated. The HRO DFB lasers operated in stable single longitudinal mode with no observable mode partition events under 2-Gb/s pseudo-random pulse modulation with dynamic spectral widths typically 0.5–2 Å even with both facets cleaved. Other characteristics of these 1.5-μm GaInAsP HRO DFB lasers include ∼10 mW/facet (no antireflection coating) of stable beam, single longitudinal mode output power, and narrow lateral beam divergence of ∼12° (half-power full width). Actual transmission experiments with dispersive fibers (17 ps/km nm) at ∼1.55 μm confirmed that the HRO DFB laser is an excellent ‘‘single-frequency’’ optical source.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
