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Ultra-low ratio tap coupler

For tapping low power from a fiber signal path, for wavelengths between 700–1600 nm.

Full Product Description
700–1599 nm
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Product description

The all-fiber construction and excellent loss characteristics provide exceptional reliability at high powers, for applications such as fiber lasers. Low tap ratios such as 0.1%, 0.01%, or 0.001% enable the monitoring photodetector to operate without damage or saturation.

G&H's proprietary manufacturing technology provides ultra-low loss in the signal path, thereby maximizing optical power handling. Consistently high return loss (>55 dB) reduces the amount of optical power reflected back along the input fiber, which helps fiber lasers operate in a stable manner.

For other wavelengths, coupling ratios, or customized fiber types please contact us.

Key features

  • Ultra-low insertion loss
  • High power handling
  • High return loss


Wavelength700–1599 nm
Coupling ratio0.1 - 0.001%
Tap insertion loss30 ±3 - 50 ±5 dB
Signal insertion loss>0.1 dB
Return loss≥55 dB
Optical power handling>4 W
Housing type codes3, 4, 5, 7 & C
Operating temperature-40 – +75°C
Storage temperature-40 – +85°C
Pigtail tensile load>5 N
Fiber typeSingle mode

Housing CodeDescriptionDimensionsPigtail
3Regular3.0 mm (∅) x 50 mm (L)Primary-coated fiber
4Semi-ruggedized slim3.0 mm (∅) x 60 mm (L)∅0.9 mm loose-tube
5Semi-ruggedized5.0 mm (∅) x 75 mm (L)∅0.9 mm loose-tube
7High power5 mm (W) x 5 mm (H) x 85 mm (L max)Primary-coated fiber
CRegular high power3.0 mm (∅) x 50 mm (L)Primary-coated fiber

Order code

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