Optoelectronics

Focusable fibre optic collimators simplify output coupling

5th March 2015
Barney Scott

Fibre optics allow laser beams to be directed to any intended location, however, one challenge is to efficiently couple the light into and out of the fibre. In general it is necessary to collimate the laser beam during output coupling. To make this process as simple as possible, Laser Components UK has developed focusable fibre optic collimators, manufactured in Germany.

Available in two diameters, Ø11.5mm and Ø19mm, these collimators are suitable for step-index fibres with 0.22 Numerical Aperture (NA), with single-mode fibres, and CO2 fibres with a core diameter of Ø750µm or Ø1000µm.

These collimators consist of lens systems that are anti-reflection coated for different wavelength ranges. Standard wavelengths of 350-700nm, 650-1050nm, 1050-1060nm, or 10.6µm are available.

Furthermore, the focal length of the system can also be selected. Depending on the application, the beam diameter requirements are very different. The correlation between beam diameter and operating distance can be taken from the datasheet.

All collimators can include connectors, namely: SMA, FC wide key, FC small key, FC/APC wide key, and FC/APC small key. Other connectors are available upon request.

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