Abstract
In this work we present the design and characterization of a simple passive microwave filter circuit with low impedance output. This circuit, designed for optical microwave harmonic mixing of digital signals up to 1 Gbit /s at any harmonic-generated carrier, combines a bandpass filter centered at 9.5 GHz with 1.2-GHz bandwidth and a low-pass filter in the frequency band of 10 kHz-1 GHz, enabling high- and low- frequency modulation schemes. Using this circuit in a hybrid integration with a DFB laser configured as an optical microwave mixer, we demonstrate that an improvement of 6 dB is obtained on both frequency bands. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 14, 139–140, 1997
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