30 January 1997 Intermodulation disortion for a hybrid AM-VSB/digital system using 1.55-μm laser and optical amplifier
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Abstract
The performance of a hybrid AM-VSB/BPSK optical fiber transmission system utilizing a 1.55 micrometer distributed feedback (DFB) laser and an Er doped optical amplifier is presented. A BPSK modulated 2 MHz pseudo-random digital channel is substituted for one of the AM channels in a 60 channel CATV system and optically transmitted using a directly modulated 1.55 micrometer DFB laser. The intermodulation distortion effects with and without optical amplification were studied. No degradation of the AM channels is observed unless the modulation depth of the BPSK channel is increased to the point where laser clipping effects become significant.
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Paul N. Freeman, Niloy K. Dutta, "Intermodulation disortion for a hybrid AM-VSB/digital system using 1.55-μm laser and optical amplifier", Proc. SPIE 2918, Emerging Components and Technologies for All-Optical Photonic Systems II, (30 January 1997); doi: 10.1117/12.265358; https://doi.org/10.1117/12.265358
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