Inherent RF linearized bandwidth broadening capability of an ultra-linear optical modulator

Benjamin B. Dingel; Andru Prescod; Nicholas Madamopoulos

doi:10.1117/12.875714

24 January 2011 Inherent RF linearized bandwidth broadening capability of an ultra-linear optical modulator

Benjamin B. Dingel, Andru Prescod, Nicholas Madamopoulos

Proceedings Volume 7958, Broadband Access Communication Technologies V; 795804 (2011) https://doi.org/10.1117/12.875714
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

Almost all existing resonator-based linearized optical modulators suffer from an inherent RF bandwidth narrowing that limit their applications and performance. Here, we show an ultra-linear optical modulator, called IMPACC, (Interferometric Modulator with Phase-modulating And Cavity-modulating Components) that has three unique RF bandwidth characteristics, which are not present in other resonator-based linearized optical modulators. We demonstrate these unique characteristics by contrasting IMPACC's performance to the Resonator-Assisted Mach Zehnder Interferometer (RAMZI) modulator. First, IMPACC can enhance its linearized RF bandwidth up to ~ 20% of central RF frequency (compared to ~1% for RAMZI). Second, unlike RAMZI, the RF bandwidth enhancement has a near-flat response characteristic across this bandwidth window. Third, IMPACC can maintain an excellent spurious free dynamic range (SFDR) capability (>130 dB at 1Hz bandwidth) across this window. The wide linear bandwidth capability is also demonstrated for modulation frequencies up to 75GHz.

Citation Download Citation

Benjamin B. Dingel, Andru Prescod, and Nicholas Madamopoulos "Inherent RF linearized bandwidth broadening capability of an ultra-linear optical modulator", Proc. SPIE 7958, Broadband Access Communication Technologies V, 795804 (24 January 2011); https://doi.org/10.1117/12.875714

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