Abstract
Due to their wavelength compatibility with erbium-doped fiber amplifiers (ED-FAs), 1550-nm distributed feedback (DFB) lasers have become key devices in a variety of analog and digital fiber communication systems. The possibility of achieving sufficient power directly from the DFB source to eliminate the need for an BDFA, while still maintaining low-noise and narrow-ltaewidth operation, is also very attractive in terms of cost-reduction in a variety of applications. In conjunction with commercially available analog/digital external modulators, high-power cw DFBs can greatly expand optical link lengths. Using an optimized loss grating DFB design to ensure stable single-mode operation, a 90 mW output power level has recently been reported at 1550 run.1 130 mW cw single-mode operation of an InGaAsP/InP strained layer multiple quantum weE (MQW) laser has recently been demonstrated at 1310 nm.2 In the following, we demonstrate >165 mW cw single-mode output powers from a 1550-nm DFB laser.
© 1996 Optical Society of America
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