Germanate glass core fiber GDF-SM-3.5/125-50

APPLICATION NOTES:

Higly Ge-doped silica fibers are used for variety of nonlinear applications.

Please see frequently asked questions below.

 

Article GDF-SM-3.5/125-50

  

Typical loss spectrum

Dispersion   

 


FIBER SPECIFICATIONS

High germania core fiber 

GDF-SM-3.5/125-50

Core diameter, µm 4 x 3 (elliptical)
Clading diameter, µm 125 ± 1
Coating diameter, µm 260 ± 10
Delta n 0.074
GeO2 concentration, % 50
Cutoff wavelength, µm ~ 1.92
Attenuation  (at 1060nm), dB/km 23
Attenuation  (at 1300nm), dB/km 12
Attenuation  (at 1550nm), dB/km 6.7
Attenuation  (at 1850nm), dB/km ~ 7
Attenuation  (at 2100nm), dB/km 49

Germanate glass core fiber (Article GDF-SM-3.5/125-50)

 

FREQUENTLY ASKED QUESTIONS:

Is there any explanation why the GDF-SM-3.5/125-50 has a 4 x3 µm elliptical core?

Viscosity of glass with very high germanium concentration is much lower compared with silica glass of the support tube. So, during the high temperature preparation of the preform in MCVD process the core tends to have some ellipticity. It takes place not in every preform (and hence in fiber) but often enough. 

Is it already a PM fiber? Does it splice well to standard PM fiber?

Mayby yes but we did not study its PM properties.  

Do you have any advice about the best way how to splice this fiber?

This fiber is spliced well with the standard fiber like SMF-28. Maybe you have to decrease the power and/or duration of the arc in the splicing machine as much as possible.

 

FORC PUBLICATIONS OF GERMANATE GLASS CORE FIBERS

 Compact all-fiber 2.1-2.7 um tunable Raman soliton source based on germania-core fiber

Publication: Vol. 27, No. 20 / 30 September 2019 / Optics Express. Autor: YANHONG LI, TUANJIE DU, BIN XU, HUIYING XU, ZHIPING CAI, VALERY M. MASHINSKY, AND ZHENGQIAN LUO

 2166nm all-fiber short-pulsed Raman laser based on germania-core fiber

Publication: Vol. 27, No. 24 / 25 November 2019 / Optics Express. Autor: TUANJIE DU,YANHONG LI,HONGJIAN WANG,ZHIHAO CHEN,VALERY M. MASHINSKY, AND ZHENGQIAN LUO

 Supercontinuum generation up to 2.7um in the germinate-glass-core and silica-glass-cladding fiber

Publication: Laser Phys. Lett. 9, No. 3, 219-222 (2012). Author: V. A. Kamynin, A. S. Kurkov, V. M. Mashinsky

 Germania-Based Core Optical Fibers

Journal: LIGHTWAVE TECHNOLOGY, VOL. 23, NO. 11, NOVEMBER 2005. Autor: Evgeny M. Dianov, Member, IEEE, and Valery M. Mashinsky

 Germania-glass-core silica-glass-cladding modified chemical-vapor deposition optical fibers: optical losses, photorefractivity, and Raman amplification

Publication: OPTICS LETTERS / Vol. 29, No. 22 / November 15, 2004. Autor: V. M. Mashinsky, V. B. Neustruev, V. V. Dvoyrin, S. A. Vasiliev, O. I. Medvedkov, I. A. Bufetov, A. V. Shubin, A. N. Guryanov, V. F. Khopin, and M. Yu. Salgansky and E. M. Dianov

 Highly doped silica-based fibers for nonlinear applications

Publication: ECOC 2004, Autor: M.M.Bubnov

Распечатать

п»ї