Generate Modulation Current LUTs for PHY2078 Based Optical Modules at Single Temperature
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Keywords: ONU, optical network unit, Phyworks, burst-mode laser driver, limiting amplifier, fiber optic, lookup table, temperature-slope efficiency, LUT, BPON, GEPON, GPON, FTTx Related Parts
APPLICATION NOTE 4927
Generate Modulation Current LUTs for PHY2078 Based Optical Modules at Single Temperature
Abstract:In a modern GEPON/GPON system, it is not cost-effective to set up the laser modulation-current lookup table (LUT) over multiple temperature points in the optical network unit (ONU) module. It is preferable to calibrate the laser and driver at a single temperature to reduce cost and improve manufacturing efficiency. Using the Phyworks PHY2078, a combined burst-mode laser driver and limiting amplifier for use within fiber optic modules, this application note proposes a method to calculate the LUT at a single temperature. The LUT is calculated using temperature-slope efficiency data.
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APPLICATION NOTE
4927,
AN4927,
AN 4927,
APP4927,
Appnote4927,
Appnote 4927
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