The ThorLabs F280APC-B is an FC/APC fiber collimator engineered for precision optical systems requiring minimal back reflection and high signal integrity. Built around an aspheric lens with a 3.4 mm waist diameter and 18.24 mm focal length, this collimator delivers a theoretical divergence angle of 0.15° at its 633 nm alignment wavelength. The angled physical contact design reduces back reflection to less than 0.5% average reflectance across the 600–1050 nm AR coating range, making it ideal for sensitive scientific and industrial applications.
Technical Specifications
• Connector Type: FC/APC
• Alignment Wavelength: 633 nm
• AR Coating Range: 600–1050 nm
• Average Reflectance (Ravg): < 0.5% at alignment wavelength
• Waist Diameter: 3.4 mm
• Waist Distance: 17.52 mm
• Focal Length: 18.24 mm
• Theoretical Divergence Angle: 0.15° (full-angle, at 633 nm)
• Housing Outer Diameter: 11 mm
• External Threading: M11 × 0.5
• Lens Type: Aspheric
• Housing Material: Non-magnetic stainless steel
• Operating Temperature Range: −40 °C to 93 °C
• Fiber Type: Single mode fiber patch cables (performance guaranteed only with single mode fiber)
– Key Features
• APC design minimizes back reflection for superior signal quality
• Aspheric lens geometry optimizes collimation at 633 nm
• Compact M11 × 0.5 threaded housing for direct integration
• Wide thermal operating range from −40 °C to 93 °C
• Stainless steel construction ensures reliability in demanding environments
– Typical Applications
• Fiber-coupled optical systems requiring low back reflection
• Scientific instrumentation and precision metrology
• Industrial laser and sensing applications
• Collimation packages integrated into optical test setups
– Compatibility & Integration
The F280APC-B is compatible with AD11BA, AD1109F, RMS11P, AD11F, AD11NT, KAD11F, KAD11NT, AD12BA, AD12F, AD12NT, KAD12F, and KAD12NT mounting adapters, enabling flexible system integration. Note: These collimation packages are not vacuum compatible.
