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Proceedings Paper

High bandwidth constant current modulation circuit for carrier lifetime measurements in semiconductor lasers
Author(s): Umesh Singh; Jon M. Pikal
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Paper Abstract

In this paper we present a novel implementation of high bandwidth constant modulation current circuit to the traditional small signal optical response technique used to determine the differential carrier lifetime of a semiconductor laser. This circuit is designed for the voltage to current conversion and to deliver a constant modulation current to the laser diode. The circuit rectifies parasitic effects of high value surface mount resistor at high frequencies used in the impedance independent optical technique and also has lower crosstalk. The application of this circuit can be generalized where the requirement arises for a high bandwidth constant modulation current circuit.

Paper Details

Date Published: 28 February 2012
PDF: 7 pages
Proc. SPIE 8259, RF and Millimeter-Wave Photonics II, 825909 (28 February 2012); doi: 10.1117/12.908658
Show Author Affiliations
Umesh Singh, Univ. of Central Florida (United States)
Jon M. Pikal, Univ. of Wyoming (United States)

Published in SPIE Proceedings Vol. 8259:
RF and Millimeter-Wave Photonics II
Robert L. Nelson; Dennis W. Prather; Chris Schuetz; Garrett J. Schneider, Editor(s)

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