Fixed Fiber Optic Attenuator and Terminator Kits

Features

• Kit Contents
• Six Fixed Fiber Optic Attenuators for 1240 - 1620 nm with Attenuation Values Ranging from 3 to
  25 dB
• Five Fiber Optic Terminators / Light Traps for Use in the 400 - 2100 nm Wavelength Range
• 12 Additional Female Dust Caps for Convenience
• 25 Additional Male Dust Caps for Convenience
• Kits Available with FC/PC or FC/APC Connectors
• Packaged in a Compact Plastic Box with Nine Individual Compartments

Thorlabs' Fiber Optic Attenuator and Terminator Kits each contain six fixed attenuators, five terminators, and a selection of dust caps. Components in the FAK03 kit have FC/PC connectors while those in the FAK05 kit have FC/APC connectors. All components are packaged in a plastic box that measures 7.0" x 3.5" x 1.25" (177.8 mm x 88.9 mm x 31.8 mm) and has nine labeled compartments. The label on the lid indicates the contents, associated Thorlabs item number (where applicable), attenuation value and tolerance for the attenuators, and wavelength range and return loss for the terminators. The table to the right lists the description and quantity of each item included within each kit. Please see the Specs tab for a complete list of specifications for all kit components.

Attenuators
The Fixed Fiber Optic Attenuators included in these kits allow one to attenuate an optical signal easily by plugging an FC/PC- or FC/APC-terminated fiber directly into the back end of the attenuator connector. The input of the attenuator has a 2.2 mm wide key female connector, making it compatible with both narrow key and wide key male connectors. The output of the attenuator has a 2.0 mm narrow key male connector. These single mode attenuators are made with polarization-insensitive doped fiber to achieve the specified attenuation over the operating wavelength range (1240 - 1620 nm).

Terminators / Light Traps
The Fiber Terminators / Light Traps included in these kits are designed to be used with ports that do not have an output fiber connected to them. Terminating connectors reduce back reflections into the input fiber by at least 50 dB by coupling emitted light into FG025LJA fiber and then diffusing the light within the terminator. In contrast, typical back reflections from an unused port can be as poor as 20 dB. Our terminators are for use with light from 400 - 2100 nm and have male, FC/PC or FC/APC 2.0 mm, narrow key connectors.

FAK03 Kit Specifications

Attenuator Item #	FA03T	FA05T	FA10T	FA15T	FA20T	FA25T
Fiber Connector	FC/PC
Key Size	Universal (Female 2.2 mm Wide-Key Input, Male 2.0 mm Narrow-Key Output)
Operating Wavelength Range	1240 - 1620 nm
Attenuation	3 ± 0.5 dB	5 ± 0.5 dB	10 ± 0.7 dB	15 ± 1.0 dB	20 ± 1.0 dB	25 ± 1.3 dB
Attenuation Grapha (Click for Details)
Transmission	50.1 ± 6.1%	31.6 ± 3.9%	10.0 ± 1.8%	3.2 ± 0.8%	1.0 ± 0.3%	0.32 ± 0.1%
Return Loss	≥40 dB
Maximum Input Power	1 W
Operating Temperature	-40 to 85 °C

• The shaded region in these plots indicates the operating wavelength range that we specify for each attenuator. Performance outside of this range is not guaranteed.

FAK05 Kit Specifications

Attenuator Item #	FA03T-APC	FA05T-APC	FA10T-APC	FA15T-APC	FA20T-APC	FA25T-APC
Fiber Connector	FC/APC
Key Size	Universal (Female 2.2 mm Wide-Key Input, Male 2.0 mm Narrow-Key Output)
Operating Wavelength Range	1240 - 1620 nm
Attenuationa	3 ± 0.5 dB	5 ± 0.5 dB	10 ± 1.0 dB	15 ± 1.0 dB	20 ± 1.0 dB	25 ± 1.5 dB
Attenuation Graphb (Click for Details)
Transmission	50.1 ± 6.1%	31.6 ± 3.9%	10.0 ± 2.6%	3.2 ± 0.8%	1.0 ± 0.3%	0.32 ± 0.13%
Return Loss	≥60 dB
Maximum Input Power	1 W
Operating Temperature	-40 to 85 °C

• The attenuation tolerance value takes into account alignment variability due to the universal key design. When mating connectors with different key sizes, the angled fiber tips may not come into full contact.
• The shaded region in these plots indicates the operating wavelength range that we specify for each attenuator. Performance outside of this range is not guaranteed.