DK Photonics uses unique fusing technique to build the 400~750nm PM fiber fused coupler. The coupling ratio could be selected according to customer’s request. It features low excess loss, small size and high polarization extinction ratio.

If you do not see a standard PM Fused Coupler that meets your needs, we welcome the opportunity to review your desired specification and quote a custom PM fused Coupler. Requests for custom fiber pigtails, different wavelengths, tap Ratio and handling power of operation or other specific needs will be readily addressed.

Performance Specifications

1. Above specifications are for device without connector, and the PM fused coupler is both axis working, no axis can be blocked; default test extinction ratio is on the slow axis. All parameters are tested at room temperature at central wavelength only.
2. ER data listed in the table are for the ports with coupling ratio greater than 10%. It will be 2 dB lower for a tap port with coupling ratio between 5-10%. For <5% tap port, ER is not considered if there is no requirement.
3. For devices with connectors, IL will be 1.5dB higher, RL will be 5dB lower and ER will be 2dB lower. The default connector key is aligned to slow axis.