The first two-tone measurements of third-order intermodulation in a wide-band (1-18 GHz) optical downconverter utilizing cascaded Mach-Zehnder modulators are presented. Intermodulation originates in the RF modulator and is downconverted along with the fundamentals to intermediate frequencies (IF). The third-order intercept in the IF band is measured and agrees well with theory.
Published in:
Microwave Symposium Digest, 1998 IEEE MTT-S International
(Volume:3
)
Date of Conference: 7-12 June 1998