Define the bond location
Head bonding supports the aligned V-groove and lid region, while tail bonding secures the fiber exit and manages strain. Treat the two locations as separate material decisions.
Document substrates and bond-line geometry
Identify the glass, ceramic, metal or polymer surfaces, surface preparation, gap, fillet geometry and dispensing access.
Confirm the available cure process
Record UV access, irradiance or dose control, available thermal post-cure and any shadowed regions that may require a dual-cure route.
Balance rigidity and stress management
Alignment fixation, shrinkage, hardness, glass-transition behavior and flexibility must be assessed according to the function of each bond location.
Validate the complete assembly
Evaluate optical alignment retention, thermal cycling, moisture exposure, mechanical loading and other application-specific reliability requirements.
INFORMATION CHECKLIST
Prepare these details for a productive material discussion.
- Head or tail bond location
- Substrates and surface preparation
- Bond-line and dispensing geometry
- UV access and thermal cure capability
- Alignment and reliability tests
TECHNICAL FAQ
Questions to clarify before evaluation
Should the same adhesive be used for FAU head and tail bonding?
Not automatically. The two locations perform different functions and may require different rigidity, flexibility, flow and cure behavior.
When is a dual-cure adhesive useful?
A dual-cure route can be considered when rapid UV fixation is needed but parts of the bond line have limited UV access.
What should be tested after bonding?
Test the finished assembly for alignment retention and the thermal, moisture and mechanical conditions relevant to its intended use.