Driving laser diodes with immunity to temperature changes, aging, and other effects

Various systems and methods are provided to achieve laser power control. In one embodiment, a system is provided that comprises a counter that holds a digital value. An digital-to-analog converter is employed to convert the digital value to an analog current (IBias/IMod)- A data threshold current is...

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Bibliographische Detailangaben
Hauptverfasser:	BAZZANI CRISTIANO, NERON CHRISTOPHE, SHIVARAM RAMAKRISHNA, SOLTESZ DARIO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES USING STIMULATED EMISSION ELECTRICITY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	Various systems and methods are provided to achieve laser power control. In one embodiment, a system is provided that comprises a counter that holds a digital value. An digital-to-analog converter is employed to convert the digital value to an analog current (IBias/IMod)- A data threshold current is generated by a laser driver (100a/100b) based upon the analog current (IBias/IMod) - The data threshold current is employed to represent a data value in a data signal employed to drive a laser diode (103). Also, circuitry is employed to adjust the digital value based upon a comparison between a target threshold current and a feedback current (FB) generated from a laser output (109) of the laser diode (103).