Abstract
By using lateral quantum confinement effect, a sub mA threshold current operation of a long wavelength GaInAsP/InP distributed-reflector (DR) laser, consisting of wide and narrow wirelike active regions, was demonstrated for the first time under room-temperature continuous-wave (RT-CW) condition. Eye-patterns have been studied for back-to-back as well as 10-km optical fiber transmission line. Even though devices had broad contact electrodes, clear eye opening was observed up to 2 Gbps pseudo random bit sequence (PRBS; 231 - 1) data. A monolithic integration of a power monitor (PM) at the front side of the DR laser was also demonstrated for the first time. Almost linear photocurrent characteristic with very high isolation resistance of 60 MΩ was obtained by separating the PM section by a narrow (500 nm) and deep groove filled with benzocyclobutene (BCB).
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