Patent Profile
| Patent No: | US6851281 [USA] | Application No: | 10/106868 |
| Title: | Method of fabricating rare earth doped optical fibre | ||
| Issue Date: | 08-02-2005 | File Date: | 27-03-2002 |
| Inventor(s): | RANJAN SEN, MISS MINATI CHATTERJEE, MILAN KANTI NASKAR, MRINMAY PAL, MUKUL CHANDRA PAUL, SHYAMLAL KUMAR BHADRA, KAMAL DA | ||
| IPC Classification: | C03B 037//07.5 | ||
| Abstract: | The present invention provides a method of fabricating rare earth doped preforms and optical fibers by a combination of modified chemical vapor deposition (MCVD) process and solution doping technique said MCVD process is used to develop matched or depressed clad structure inside a silica glass substrate tube followed by deposition of porous silica soot layer containing GeO2, P2O.sub.5 or such refractive index modifiers by the backward deposition method for formation of the core and presintering the deposited particulate layer by backward pass with flow of GeCl4 and/or corresponding dopant halides, soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing codopants such as AlCl3 in definite proportion, drying, oxidation, dehydration and sintering of the RE containing porous deposit and by collapsing at a high temperature to produce the preform followed by drawing the fibers by known technique to produce fibers with suitable core-clad dimensions and geometry. |
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| Licensing Option: | Technology development complete. Engineering package can be supplied. | ||
CSIR-Central Glass and Ceramic Research Institute[CSIR-CGCRI]
: director[at]cgcri[dot]res[dot]in
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: director[at]cgcri[dot]res[dot]in
:91-33- 24735829
:https://www.cgcri.res.in
Industrial Applications
Optical [Communications]