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Proceedings Paper

Modeling and matching of directly modulated diode lasers for phased-array radar applications
Author(s): Brad Kanack; Charles L. Goldsmith
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Paper Abstract

This paper describes laser measurement and modelling techniques pursuant to developing impedance matching networks for bandwidths over an octave. Models presented include a novel large signal model that has a measurement based nonlinear photon resistance term to induce curvature into the L-I characteristic of the laser. It is found that predicted intermodulation performance varied about 1 dB between the linear and nonlinear photon resistance models implying the dominate nonlinearity is due to the I-V characteristic of the laser. Finally, the models are used with microwave design tools to synthesize and optimize a Chebyshev impedance matching network employing a Norton equivalent transformer. The impedance matching circuit results in a simulated 10 dB improvement over resistive matching with a VSWR of less than 1.5 over the band of interest.

Paper Details

Date Published: 2 December 1992
PDF: 12 pages
Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); doi: 10.1117/12.138402
Show Author Affiliations
Brad Kanack, Texas Instruments Inc. (United States)
Charles L. Goldsmith, Texas Instruments Inc. (United States)


Published in SPIE Proceedings Vol. 1703:
Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III
Shi-Kay Yao; Brian M. Hendrickson, Editor(s)

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