1.5 mu m optical filter using a two-section Fabry-Perot laser diode with wide tuning range and high constant gain

The 1.5- mu m optical filter exhibits a tuning range as wide as 188 GHz (15 AA), with 23-dB constant gain and 5-GHz constant bandwidth. A 25-channel wavelength selection with less than -10-dB crosstalk is expected with this filter. The wavelength-tunable optical filter has applications in wavelength-division multiplexing lightwave transmission systems and wavelength division photonic switching systems.<
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