Singlemode step-index preforms

Specification.

Geometrical Characteristics	Singlemode Preform 09/125	Unit
Core Composition	SiO2-GeO2
Refractive Index Profile	Nearly matched clad
Refractive Index Delta	3.65 x 10-3
Tolerance of Delta within a Rod	0.35 x 10-3
Numerical Aperture
Preform Diameter (O.D.)	49.0 or 70.0	mm
Tolerance of O.D. from Rod to Rod	+/- 2.0	mm
Tolerance of O.D. within a Rod	+/- 0.5	mm
Preform Length	600-1200	mm
Preform Bow	≤ 0.7	mm/m
Preform Non-Circularity	≤ 1.0	%
Clad Concentricity Error of O.D.	≤ 0.6	%

 

Target fiber specifications for SMF fibers drawn from our step index Singlemode preforms

Target Fiber Specifications Singlemode Fibers	Singlemode Preform 09/125	Unit
Mode Field Diameter (1310nm)	8.8 - 9.6	µm
Core Non-Circularity	≤ 6.0	%
Core/Clad Concentricity Error	≤ 0.8	µm
Cladding diameter	125 +/- 1.0	µm
Cladding Non-Circularity	≤ 1.0	%
Attenuation 1310 nm 1550 nm 1383 nm	≤ 0.36 ≤ 0.22 ≤ 1.0	dB/km
Uniformity of Attenuation (OTDR)	≤ 0.05	dB/km
Cut-Off-Wavelength	1190 - 1330	nm
Zero Dispersion Wavelength	1302 - 1322	nm

 

Our step index preforms are being delivered upon request with a handle end, a rod or tube, to allow clamping of the preform for drawing.

The drop end (Taper) is formed as a cone and the "handle end" is a tube or rod with the same diameter as the preform.

O.D. handle = O.D. preform