Fiber Collimators
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Single mode pigtailed fiber collimators are used to transform the laser emitted from fiber into a parallel Gaussian beam by finely positioning the lens to fiber or couple the parallel Gaussian beam into fiber in inverse. It can be used in reflective type and thrubeam type. Normally, a sphere lens or GRIN lens is used in collimator to transform light. It can be divided into specified working distance collimators and wide working distance range collimators.
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High temperature pigtailed fiber collimators can operate from -40℃ to +220℃ with special design, technology and materials. Each collimator must be tested for 48h at 220℃ before sending to customers, which ensures the reliability of the device working in a high temperature environment for a long time.
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Normally there exits offset or angle between Optical axis and mechanic axis of fiber collimator. That causes great insert loss. Collimators can’t be plug and play or rotated in use. The offset and angle between optical axis and mechanic axis of aligned fiber collimator are eliminated with ingenious design and precise assembling. It greatly improves installation efficiency with free adjustment. It also supports rotation of fiber collimator in use and can be used in optical fiber rotary connectors and other products.
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Short Work Distance Pigtailed Fiber Collimators can focus light into a very small spot(several microns to dozens of microns diameter), which is important for some applications like topography, ranging.
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Aspheric Lens Fiberport Collimators can correct spherical aberration. Energy of the laser has a Gaussian distribution and beam is well collimated. But it can‘t correct chromatic aberration. Because focal length of aspherical lens is related to wavelength.
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Single Mode Achromatic Fiber Collimators is used for wide band application. Chromatic aberration is elaborately compensated with special design on materials, curves, thickness and separation of lenses. Please use right connectors and fibers listed in tables.
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Multimode Achromatic Fiber Collimators is used for wide band application. Chromatic aberration is elaborately compensated with special design on materials, curves, thickness and separation of lenses. Please use right connectors and fibers listed in tables.
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Reflective Achromatic Fiber Collimators uses a 90⁰ off-axis ellipsoidal mirror to couple free space laser beam into fiber or vice versa. Focal length of reflective mirror is irrelevant with wavelength. That makes it an idea solution to achromatic aberration. Al, Ag and Au is optional to be deposited as reflective film.
- Aluminum averages greater than 90% reflectance from 200nm to the far infrared, except in the 750 – 900nm region where it averages around 85% reflectance.
- Silver coatings can offer better performance in the visible and NIR from 450nm to 2μm.
- For IR performance gold coatings offer high reflectivity of around 97% from 700nm up to 10μm.
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Long work distance fiber collimator - series 1 can provide near parallel beam up to 200 meters. Aberration is corrected to emit the near diffraction limit light with separated lenses. But effective focal length is still affected by wavelength. So, this collimator performs best at the specified wavelength.
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Long work distance fiber collimator can provide near parallel beam up to 200 meters. Aberration is corrected to emit the near diffraction limit light with separated lenses. But effective focal length is still affected by wavelength. So, this collimator performs best at the specified wavelength.
