Optical circulators
For architectures that separate launched and returning light through a directional path. Review wavelength, port mapping, insertion loss and isolation requirements against the chosen model.
Explore circulator configurations →For FBG interrogator OEMs & sensing-system builders
Passive fiber components for your FBG interrogator.
Short answer: An FBG interrogator typically needs passive parts for directional routing (optical circulators), splitting or combining (fiber couplers) and, only when the design requires it, polarization-maintaining components. KernsOptic supplies these to interrogator OEMs from component-level parameters — wavelength band, power, fiber type, port layout and quantity — without needing your system drawing.
Source circulators, couplers and polarization-maintaining components around your optical requirements. Start with the parameters you know; we review the configuration and provide a drawing for confirmation.
Component supply and configuration review · Final feasibility and quotation follow engineering confirmation
Choose by optical function
Component functions in the optical path
FBG interrogation designs differ. Specify the routing or splitting function you need before selecting a component; a circulator or PM configuration is not required in every design.
Fiber couplers
For splitting or combining optical paths. Identify the port layout and coupling ratio, then review fiber compatibility and the optical loss budget for your system.
Explore couplers and polarization components →PM components
When your design needs a defined polarization state, specify the PM fiber, alignment and extinction-ratio requirements. Select PM only where the architecture calls for it.
Review PM selection considerations →A practical first inquiry
Component-level review.
You do not need to share your internal system drawing. Tell us the component function and the conditions at its optical interfaces. Missing details can be clarified during review.
- Component type or required routing / splitting function.
- Operating wavelength band and optical power.
- Fiber type and whether polarization must be maintained.
- Port layout or coupling ratio, where applicable.
- Quantity and any package, pigtail or connector constraints.
Component specifications & procurement review
If your team specifies the component, send the requirements directly. If an integrator owns that selection, the component specification can be reviewed with the responsible engineer.
Only share what you can disclose.
Component-level parameters let us start a discussion without requesting a confidential system design. We prepare a configuration drawing from the reviewed requirements for your confirmation.
From requirement to quotation
FBG component configuration review.
01
Application & requirements
The intended component function and available parameters provide a basis for review.
02
Configuration review
We coordinate engineering review, clarify missing details and provide a drawing for confirmation.
03
Quotation & production review
Once the configuration is agreed, discuss quotation and any sample requirements. Availability, performance and timing are confirmed for the specific request.
Component enquiries
KernsOptic coordinates FBG component review from the available parameters, with an engineering confirmation drawing prepared through Shenzhen Kanghao Technology Co., Ltd.
- No internal system drawing needed—optical interface parameters are enough.
- Initial review within 24 hours; drawing prepared for your confirmation.
- Samples and formal quotation follow agreed specifications.
Prefer direct email? jenny@kernsoptic.com
Need the multi-field builder? Open Full RFQ Page →
Configuration details
Read the 3-port circulator selection guide · Explore sensing component families
Is this a complete FBG interrogator?
No. This page covers passive optical components for integration into an interrogator or sensing system. Your system architecture determines which components are appropriate.
Do all FBG systems need PM components?
No. The need to maintain polarization depends on the optical design. Share the polarization requirement with the fiber specification for review.
Can I ask about a non-standard configuration?
Yes. Send the known parameters and constraints. Engineering review establishes feasibility before a configuration or quotation is confirmed.
Circulator vs 3×3 coupler
Explore the optical circulator family and the 3-port optical circulator selection guide.