Abstract
Recent progress in 1550 nm semiconductor optical amplifier (SOA) [1] in addition to attractive results obtained in preamplifier application [2] have retain much attention. Besides, the ability of (SOA) to provide strong non-linear effects such as four wave mixing, cross gain and cross phase modulation for relatively low optical intensity has enlarged their field of applications. Optical time division multiplexed (OTDM) communication systems using SOA based nonlinear optical loop mirror (NOLM) [3], phase conjugation for in-line chromatic dispersion compensation [41 and fast signal processing [5] are extensively studied and show that an increasing demand exists for solitary SOA module. For most of applications polarization independence is generally required as well as a high coupling efficiency to external fiber. In this view, we report on a semiconductor amplifier module operating at 1550 nm and giving very high fiber to fiber gain as well as a low polarization dependence and a very low spectral gain ripple.
© 1995 Optical Society of America
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