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Ring Resonator Modulator 70 GHz


The plasmonic Ring Resonator Modulator (RRM) demonstrates efficacy in high-speed electro-optic conversion within the C band, characterized by a bandwidth exceeding 85 GHz.

Key Features

  • Polariton Logo lines

    3-dB electro-optic bandwidth >70 GHz

  • Logo-lines

    C-band operation

  • Logo-lines

    Lumped, low-capacitance RF design

  • Logo-lines

    Compact form factor


The plasmonic Ring Resonator Modulator (RRM) is an ideal solution for high-speed electro optic conversion in the C band. Featuring a bandwidth of beyond 85 GHz makes it a first choice for applications in measurement systems, radio-over-fiber (RoF) systems and for high-data-rate optical transport.

The RRM has a resonant spectrum with peaks and extinctions. This allows for a change of the operating point by tuning the wavelength of the laser source, making an additional voltage source obsolete.

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Performance Data

Peak wavelength

~1550 nm

Insertion loss (IL)

<10 dB

Static extinction ratio (ER)​

>8 dB

DC bias on/off voltage​

<1.5 V

3-dB EO bandwidth

>70 GHz

Spectral Modulation Shift

>0.15 nm/ V

Free Spectral Range

~7 nm

Maximum Ratings

Optical input power*

0 dBm

RF input power @50 Ohm

18 dBm

DC voltage at RF input

0 V

Operating / storage temperature​

~25 °C

* Operation time of 8000 h with a spectral modulation shift degradation <2.5%

Mechanical Specifications

Optical input

PM with FC/APC connectors

Optical output​

SMF with FC/APC connectors

Electrical RF interface​

2x Differential, 1 mm female

DC interface​

2 x DC pins