Optical fiber fabrication process comprising determining mode field radius and cut-off wavelength of single mode optical fibers
US4552578A · kind A · utility
8Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | May 16, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/13
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A single mode optical fiber manufacturing process can be monitored and/or controlled determining the mode field radius and/or the cut-off wavelength of fiber produced by the process, comparing these measured fiber parameter values to predetermined target values, and setting a process step in accordance with the result of the comparison. Both fiber parameters are determined by a procedure comprising measuring, as a function of angle, the far-field power emitted by a test fiber segment, and determining the parameters of a Gaussian function G(.theta.), typically by maximizing the value of an overlap integral.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.