Effect of Ring Resonator Waveguide Loss on SFDR Performance of Highly Linear Optical Modulators Under Suboctave Operation

We investigate the effect of ring resonator (RR) waveguide loss on the spurious-free-dynamic-range (SFDR) performance of two types of highly linear, resonator-enhanced optical modulators, namely, 1) the Resonator-Assisted Mach-Zehnder Interferometer (RAMZI) modulator, and 2) the Interferometric Modu...

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Bibliographic Details
Published in:IEEE photonics technology letters 2010-09, Vol.22 (17), p.1297-1299
Main Authors: Prescod, A, Dingel, B B, Madamopoulos, N, Madabhushi, R
Format: Article
Language:English
Subjects:
Analog fiber-optic links
Conferences
Fiber optics
interferometric modulator with phase-modulating and cavity-modulating components (IMPACC)
linear optical modulator
microwave photonics
Modulators
Noise levels
Optical devices
Optical fibers
Optical interferometry
Optical losses
Optical modulation
Optical resonators
Optical ring resonators
Optical waveguide components
Optical waveguides
Performance loss
Phase modulation
radio-frequency (RF) photonics
resonator-assisted Mach-Zehnder interferometer (RAMZI)
Resonators
ring resonator assisted Mach-Zehnder modulator (RR MZM)
Tolerances
Waveguides
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Summary:We investigate the effect of ring resonator (RR) waveguide loss on the spurious-free-dynamic-range (SFDR) performance of two types of highly linear, resonator-enhanced optical modulators, namely, 1) the Resonator-Assisted Mach-Zehnder Interferometer (RAMZI) modulator, and 2) the Interferometric Modulator with Phase-modulating And Cavity-modulating Components (IMPACC). We show that the respective SFDR values of both traveling-wave RAMZI and traveling-wave IMPACC degrade by as much as 20 dB from their peak values when the RR waveguide loss increases by 20%. However, unlike RAMZI, the IMPACC design allows for SFDR compensation (from 114 to 132 dB) by simply adjusting one of its externally accessible parameter controls-the radio-frequency power split ratio, under suboctave operation. This unique feature of IMPACC provides optimum performance, adds greater design flexibility, and increases manufacturing tolerance.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2010.2053842