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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 27,
  • Issue 8,
  • pp. 1051-1058
  • (2009)

A Passive Broadband Impedance Equalizer for Improving the Input Return Loss of Electro-Absorption Modulators

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Abstract

Based on the context of an electro-absorption modulator integrated laser and the industry's standard 7-pin package having a RF connector, a complete module design that incorporates a simple yet effective broadband impedance equalizer to improve the input return loss of electro-absorption modulators (EAM) is proposed. The passive broadband impedance equalizer effectively reduces the input return loss of the EAM from between ${-}$9.84 and ${-}$5.26 dB to between ${-}$11.5 and ${-}$9.35 dB over a frequency range from 4.4 to 12.2 GHz without having to add a resistor in series with the EAM or reducing the EAM absorption-layer capacitance from the value that was optimized for optimal optical performance.

© 2009 IEEE

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