Start // Fiber Optics // Fiber Couplers / Collimators // Coupler // Fiber Collimator for collimating large beam diameters with integrated quarter-wave plate by Schäfter + Kirchhoff - 60FC-Q811-0-M125-54

60FC-Q811-0-M125-54

Fiber Collimator for collimating large beam diameters with integrated quarter-wave plate

Features

The fiber collimator is designed for collimating radiation exiting from an optical fiber cable. An integrated adjustable quarter-wave plate is used to generate left-handed or right-handed circularly polarized radiation.
  • Large beam diameters: Focal length 125 mm
  • Optics type: Doublet optics, Monochromatic
  • AR-Coating: 630 - 1080 nm
  • Retardation optics for 811 nm
  • Low-order retardation optics with minimal angular dependency
  • Paraxial coupling axis, FC-APC connection
  • Integrated TILT adjustment to prevent aberrations from vignetting or clipping
  • Front connector accepts attachment optics

Description

The fiber collimators series 60FC-Q has an integrated quarter-wave plate and is designed for collimating radiation exiting optical fiber cables with high pointing stability and adjustable right-handed or left-handed circular polarization. They are suitable for single-mode and polarization-maintaining fiber cables leading to collimated beams with a Gaussian intensity profile.
The features of the collimator type 60FC-Q include:

Optics
The monochromat with focal length 125 mm is designed for collimating single wavelengths. It is AR-coated from 630 - 1080 nm. It is corrected for spherical aberrations and designed in such a way that it leads to a diffraction-limited beam with an M2 < 1.05. The focus position varies strongly with wavelength so that the collimator has to be recollimated after any changes to the wavelength. It is not suitable for UHV applications.

Adjustment of focus, TILT, and state of polarization
The distance between fiber end-face and collimating optics is adjusted by means of an eccentric key. The lens does not rotate when adjusting the focus. The final focus setting is locked by means of two radially arranged clamping screws. Additionally attachment opticsof series 60FC-Q can be mounted to the front of the collimator. Additionally, the collimator has an integrated TILT adjustment for aligning the beam axis to the mechanical axis. This prevents vignetting of the collimated beam as well as diffraction arising from the clipped beam. The integrated low order retardation optics with minimal angular dependency allows the adjustment of the state of polarization in the assembled state between right-handed and left-handed circular polarization. This is done using a cogged tool and can be monitored using the polarization analyzers series SK010PA. Retardation optics are available for typical wavelengths between 389 nm and 1084 nm.

Connector Type
The fiber collimator is equipped with a FC-APC type receptacle. Because of the spring-loaded fiber ferrule the fiber collimator has an additional grub screw to increase pointing stability.

Material
The fiber collimator type 60FC-Q is made from nickel silver/aluminium (standard)

Mounting
The collimator possesses a flange for low-strain mounting e.g. using the clamp collars series CC.

Technical data

60FC-Q811-0-M125-54

Series
60FC-Q
Order Code
60FC-Q811-0-M125-54
Focal length
125 mm
AR coating
54
Wavelength range
630 - 1080 nm
Lens type
Doublet optics
Correction
Monochromatic
Numerical aperture
0.16
Clear aperture
40 mm
Wave plate
811 nm
Wave plate retardation
lambda/4
Wave plate type
low order
Connector type
FC-APC
Outer diameter
Ø 45/49 mm
Length
141 ± 2 mm
Tilt adjustment
Yes
Front fitting
Ø M43 x 0.75 mm
Housing material
Nickel silver/Aluminium
UHV compatible
No
Suitable for multimode
No
Note

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Accessories

9D-12
Screwdriver WS 1.2
55EX-5
Eccentric key with a stroke of ± 1.5 mm.
50HD-15
Hex key WS 1.5
60Z-2803
Tool for rotating the wave plate in fiber collimators series 60FC-Q
Polarization Analyzer SK010PA

Measurement tool for coupling into polarization-maintaining fiber cables