| 摘要 |
An optical transmission fiber comprising a central core, a first intermediate cladding having an index difference Dn 2 , with the outer cladding, a first depressed cladding having an index difference Dn 3 with the outer cladding which is higher than or equal to -5.10 -3 , the second intermediate having a cladding having an index difference Dn 4 with the outer cladding and second depressed having an index difference Dn 5 with the outer cladding. The optical fiber presents at a wavelength of 1625 nm, bending losses inferior or equal to 0,1 dB/10 turns for a bending radius of 15 mm and bending losses inferior or equal to 0,5 dB/ turn for bending radius of 7,5 mm. The optical fiber presents reduced bending and micro-bending losses while presenting optical performance of a standard step index transmission fiber (ssmf). |
