Fiber amplifier cascade for multiwavelength lightwave communications system
US5345332A · kind A · utility
12Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | May 3, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a multiwavelength lightwave communications system channel-by-channel power regulation is achieved with a cascade of inhomogeneously broadened saturated fiber amplifiers spaced along the optical fiber transmission path. In the described embodiment, inhomogeneous broadening is achieved by immersing each of the erbiumdoped fiber amplifiers in the cascade in a bath of liquid nitrogen, thereby cooling each amplifier to approximately 77 K.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.