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Wavelength dependent performance of 20 gbit/s rz-dpsk for upgrades of non-slope matched submarine transmission systems
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Method of tuning an adjustable dispersion compensator
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Optical filter
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Twin Optical Amplifier with Dual Pump Power Control
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Twin optical amplifier with dual pump power control
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Mixed bitrate and modulation format upgrades of non-slope matched submarine links
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In-service optical time domain reflectometry measurement of undersea cable systems
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Micro-processor based repeater control
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Power efficient laser drive circuit for a repeater
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Undersea repeater surge protection and power separation
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Method and Apparatus for Producing High Extinction Ratio Data Modulation Formats
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Bit error rate performance estimation and control
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An optical receiver and an optical transmission system incorporating the same
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Method and apparatus for producing high extinction ratio data modulation format
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Pulsed high loss loop back signalling scheme
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Method and apparatus for producing chirped RZ-DPSK modulated optical signals
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Method for producing a duo-binary optical signal
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