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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