Optical isolators of Fibrain Directivity family are passive, 2-port optical devices that allow for transmission of light only in one direction. Standard Fibrain isolators are insensitive to polarization. Optical isolators are used to reduce the amount of reflected and backscattered optical power propagating in the link, securing the receiver from damage and potential instabilities. The isolators are available in single stage and dual stage versions and in versions optimized for 1310, 1490, 1550, and 1590 nm windows. They are delivered with a report containing attenuation and isolation values in the operation bandwidth. A wide range of fiber connectors is available.
|Parameter||One-step isolator||Two-step isolator|
|Central wavelength||1310 or 1550* nm|
|Operation band||Λc ± 15 nm||
Λc ± 30 nm
|IL||≤ 0.5 dB||≤ 0.7 dB|
|Directional isolation||≥ 30 dB||≥ 45 dB|
|RL||≥ 55 dB|
|Max. optical power||500 mW|
|PMD||< 0.1 ps|
|Temp. of operation||from – 50C to + 750C|
|Temp. of storage||from – 400C to + 850C|
* Other operation windows available upon request.
Notice: Parameters listed in the table refer to components without connector terminations.
Optical circulators with output fibers with 250/900 µm coating have a 5.5x50 mm pipe casing with a serial naumber printed on the pipe with an indicated direction of transmission.