A practical method is proposed for complete gain measurement in distributed feedback (DFB) laser diodes. It is non-destructive and does not require any reference device. It includes the whole range of continuous gain values, from its minimum to threshold, passing through the transparency condition. The method requires a single absolute gain measurement for calibration. An example is reported for a DFB preserving Fabry-Perot multi-modes in the sub-threshold regime.
Extended Modal Gain Measurement in DFB Laser Diodes
VANZI, MASSIMO;MARCELLO, GIULIA;MURA, GIOVANNA;
2017-01-01
Abstract
A practical method is proposed for complete gain measurement in distributed feedback (DFB) laser diodes. It is non-destructive and does not require any reference device. It includes the whole range of continuous gain values, from its minimum to threshold, passing through the transparency condition. The method requires a single absolute gain measurement for calibration. An example is reported for a DFB preserving Fabry-Perot multi-modes in the sub-threshold regime.
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