| 摘要 |
<p>A method and device for providing an optical fiber secondary preform by collapsing an over-cladding tube on an optical fiber primary preform is disclosed in the present invention. The device for over cladding the optical fiber primary preform includes a hand bar as a first supporter for supporting the optical fiber primary preform, which hand bar has a sealing-up part of the over-cladding tube on an outer diameter part thereof and also includes a supporting handle tube as a second supporter for supporting the over-cladding tube, which the purity of the supporting handle tube is different from that of the over-cladding tube. Also the supporting handle tube includes a ring to make it equal two centers of the optical fiber primary preform and the over-cladding tube.</p> |
