Any Standard or 4-channel multichannel microelectrode array can be configured as an optoelectrode to enable concurrent optical stimulation and neural recording. An optical fiber (105 µm diameter) is placed on the recording side of the shank (see above image), and terminates 200 µm above the proximal site (distance can be customized). Multi-shank microelectrode arrays can be configured as optoelectrodes, but have limitations on fiber placement. Contact us for more information.

Probe Package and Headstage Interface

NeuroNexus optoelectrodes use packages similar to our Standard probes. We recommend the OA series for acute experiments, and the OCM (Omnetics Nano) and OZ (TDT Zif Clip™) series for chronic experiments.

Opto Qtrodes

Optical fibers can now be specified with our 4-channel Qtrodes, for optogenetic applications requiring low channel counts, or for replacing wires. (Shown above: Chronic Opto Qtrode, left, and Acute Opto Qtrode, right)

Specifications - Optoelectrodes

Fiber Fused silica, 105 µm core, multi-mode
Outer Diameter 125 µm (105 µm core)
Weight (Coupler) < 0.5 g
Numerical Aperture


Durability < 5% transmission variability after 40 connections
Rotation Test < 2% variation over 1 rotation
Connection Strength > 300 g before latch separation (typical)
Max. Shear Force 900 g (applied to top of female coupler)
Length Tolerance ± 500 µm
Fiber Tip Profile Flat
Note Internal reference site is disconnected as standard. Certain designs may allow ref. site connection; contact us for specifics.

OptrodeHowTo Video RS-01

How to Order a NeuroNexus Optrode

Learn about all the options available to you when ordering a NeuroNexus Optrode.