Journal
IEEE PHOTONICS JOURNAL
Volume 4, Issue 6, Pages 2214-2228Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2012.2228477
Keywords
Linear modulator; traveling-wave electrode; electro-optic (EO) polymer; directional coupler; Delta beta reversal; spurious-free dynamic range (SFDR)
Funding
- Defense Advanced Research Projects Agency (DARPA) [SBIR W31P4Q-08-C-0160]
Ask authors/readers for more resources
In this paper, we present the design, fabrication, and characterization of a traveling-wave directional coupler modulator based on electro-optic polymer, which is able to provide both high linearity and broad bandwidth. The high linearity is realized by introducing Delta beta-reversal technique in the two-domain directional coupler. A traveling-wave electrode is designed to function with bandwidth-length product of 302 GHz. cm, by achieving low microwave loss, excellent impedance matching, and velocity matching, as well as smooth electric-field profile transformation. The 3-dB bandwidth of the device is measured to be 10 GHz. The spurious-free dynamic range of 110 dB +/- 3 Hz(2/3) is measured over the modulation frequency range of 2-8 GHz. To the best of our knowledge, such high linearity is first measured at the frequency up to 8 GHz. In addition, a 1 x 2 multimode interference 3-dB splitter, a photobleached refractive index taper, and a quasi-vertical taper are used to reduce the optical insertion loss of the device.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available