Optical amplifiers with pump redundancy

In this invention, at least two laser diodes (48, 52) are coupled via a coupler OPTICO 3dB (50) TO SUPPLY POWER PUMP TO EACH OF THE TWO optical fiber amplifiers (30, 36) simultaneously. IF A TWO BOMBS OF LASER DIODE FAULT, THE OTHER LASER DIODE PUMP IS SENT FOR PROVIDING POWER PUMP TO EACH OF FIBER OPTIC AMPLIFIERS. So with the addition of a COUPLER 3DB, OBTAINED REDUNDANCY PUMP FOR A PAIR OF FIBER OPTIC AMPLIFIERS PUMPS only two diode laser instead of the four bombs laser diode normally required. In practice, only one of the two pumps MUST BE IN ACTIVE AND OTHER ONLY WHEN CAN CONNECT THE FIRST PUMP FAILURE. In another embodiment, the two pumps LASER DIODE MAY BE IN ACTIVE AT ALL TIMES AND EACH PUMP laser diode is operated FULL OR LESS POWER. In the arrangement where bombs diode lasers are operated simultaneously LESS THAN FULL POWER WHEN OCCURS pump failure OUTPUT POWER PUMP DIODE GOOD LASER MAY BE INCREASED TO OFFSET THE LOSS OF POWER PUMP DEFECTIVE.