Modeling and matching of directly modulated diode lasers for phased-array radar applications

Brad Kanack; Charles L. Goldsmith

doi:10.1117/12.138402

2 December 1992 Modeling and matching of directly modulated diode lasers for phased-array radar applications

Brad Kanack, Charles L. Goldsmith

Proceedings Volume 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III; (1992) https://doi.org/10.1117/12.138402
Event: Aerospace Sensing, 1992, Orlando, FL, United States

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.

Citation Download Citation

Brad Kanack and Charles L. Goldsmith "Modeling and matching of directly modulated diode lasers for phased-array radar applications", Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); https://doi.org/10.1117/12.138402

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