MULTIMODE CIRCULATOR/COMBINER

Castor Optics’ Wideband Multimode Circulator (WMC) is a three-port device that features a flat spectral response, high efficiency multimode transfer (Port 1 ⟶ Port 2), and multimode transmission (Port 2 ⟷ Port 3). It can be used to combine multiple signals or illumination/detection channels within a single fiber. Castor’s all-fiber WMC series is an efficient, versatile, and robust solution for multimode light management with applications in diffuse reflectance spectroscopy, fluorescence spectroscopy, and/or optogenetics.

Wavelength range: 400-900 nm

Multimode transfer (Port 1 to 2): ≥70%

Multimode transmission (Port 2 to 3): ≥70%

Multimode transmission (Port 3 to 2): ≥70%



Port 1 Fiber: 50 µm, 0.22NA

Port 2 & 3 Fiber: 105 µm, 0.22NA


Available with FC-PC or SMA905 connectors. 


Compatible with DC1300 & DC1060 DCFC series.

Wavelength range: 400-1600 nm* 

Multimode transfer (Port 1 to 2): ≥80%

Multimode transmission (Port 2 to 3): ≥80%

Multimode transmission (Port 3 to 2): ≥80%


* performance in the water absorption region centered at 1388nm is not guaranteed.


Port 1 Fiber: 105 µm, 0.22NA

Port 2 & 3 Fiber: 200 µm, 0.39NA


Available with FC-PC or SMA905 connectors. 

If our standard configurations don't fit your needs, contact us for custom WMCs specific for your application.

We can use about any kind of multimode and single mode fiber to design a new version.

Wavelength range: 400-1600 nm* 

Multimode transfer (Port 1 to 2): ≥80%

Multimode transmission (Port 2 to 3): ≥80%

Multimode transmission (Port 3 to 2): ≥80%


* performance in the water absorption region centered at 1388nm is not guaranteed.


Port 1 Fiber: 105 µm, 0.15NA

Port 2 & 3 Fiber: 200 µm, 0.22NA


Available with FC-PC or SMA905 connectors. 

Wavelength range: 400-1600 nm* 

Multimode transfer (Port 1 to 2): ≥85%

Multimode transmission (Port 2 to 3): ≥85%

Multimode transmission (Port 3 to 2): ≥85%


* performance in the water absorption region centered at 1388nm is not guaranteed.


Port 1 Fiber: 200 µm, 0.22NA

Port 2 & 3 Fiber: 400 µm, 0.39NA


Available with FC-PC or SMA905 connectors. 

© 2016 by Castor Optics, Inc.