| 摘要 |
The present invention relates to a method and a device for detecting damages in an optical fibre ( 1,2 ) made for transmitting high optical power, specifically power exceeding 1 kW, and where the optical fibre ( 1,2 ) has an entrance end ( 7 ) for incident optical radiation ( 4 ) and an exit end where the optical radiation is leaving the fibre. According to the invention substantially radially spread radiation in connection with the entrance and/or exit parts of the fibre is detected, and if this radiation exceeds a certain level this is used as an indication of a damage in the entrance and/or exit zone of the fibre. |
