Fiber Optic Collimators for SM, MM and PM Fibers
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Frequently Asked Questions
Fiber Optic Collimators for Light Transport
Collimators are optical assemblies that transform divergent light from an optical fiber into a parallel beam, or focus an incoming beam back into a fiber. In fiber optomechanics and other light transport setups, collimators are critical for coupling efficiency, beam quality, and stable alignment between fiber and free-space optics.
Key Specifications of Collimators
When comparing collimators on FindLight, procurement engineers and researchers typically evaluate:
- Supported fiber type: Single-mode, multimode, PM fiber, large-mode-area, or specialty fibers.
- Wavelength range: Designed center wavelengths (e.g., 405 nm, 633 nm, 850 nm, 1310 nm, 1550 nm) and AR coating bands.
- Beam diameter and divergence: Output beam size at a given distance and residual divergence angle, which determine propagation and focusing behavior.
- Numerical aperture (NA) compatibility: Matching the fiber NA and lens design to minimize insertion loss and back-reflection.
- Optics type: Aspheric, achromatic doublet, GRIN lens, or reflective collimators for broadband or high-power operation.
- Connector and ferrule style: FC/PC, FC/APC, SC, SMA, bare fiber, or threaded mounts for integration into optomechanical stages.
- Power handling: Maximum continuous and peak power for laser applications.
- Mechanical format: Package diameter, length, mounting threads, and environmental sealing.
Typical Applications of Collimators
Collimators on this page support light transport in systems such as fiber laser delivery, free-space optical links, interferometers, fiber sensing, test and measurement setups, and coupling into spectrometers or nonlinear crystals. They are also used for beam expansion, beam steering, and mode matching between fiber and bulk optics.
Buyer Guidance on FindLight
Use FindLight to compare collimators across multiple manufacturers by wavelength range, supported fiber type, beam diameter, and mechanical interface. Review detailed datasheets to assess insertion loss, return loss, and tolerance data. For complex assemblies or custom collimators—such as high-power compatible or broadband designs—contact vendors directly through the platform to request quotations or discuss modifications. Quotations and technical inquiries can be initiated without registration, helping you iterate quickly on designs and source collimators that match your optical system requirements.