| 摘要 |
A GAIN-CLAMPED OPTICAL AMPLIFIER FOR AMPLIFYING SIGNALS FROM A WAVELENGTH DIVISION MULTIPLEXER, COMPRISES AN INLET PORT (1) FOR THE WAVELENGTH DIVISION MULTIPLEXER SIGNALS, A FIRST ISOLATOR (2), AFIRST WAVELENGTH SELECTIVE COUPLER (4) FOR RECEIVING THE WAVELENGTH DIVISION MULTIPLEXER SIGNALS THROUGH ONE OF ITS DOUBLE LEGS, A FIRST PUMPING LASER (3) PRODUCING A SIGNAL AT A FIRT WAVELENGTH AND PASSING IT TO THE FIRST WAVELENGTH SELECTIVE COUPLER (4) THROUGH IT SOTHER DOUBLE LEG FOR COMBINATION WITH THE WAVELENGTH DIVISION MULTIPLEXER SIGNALS , A LENGTH OF RARE EARTH, PREFERABLY ERBIUM, DOPED FIBRE (5) FOR AMPLIFYING THE COMBINED SIGNALS, A FIBRE BRAGG REFLECTOR (6) FOR FILTERING OUT THE DESIRED SIGNALS AND REFLECTING UNDERSIRED SIGNALS BACK TO THE RARE EARTH DOPED FIBRE(5), A SCEOND WAVELENGTH SELECTIVE COUPLER (7) FOR RECEIVING THE DESIRED SIGNALS FROM THE FIBRE BRAGG REFLECTOR (6) THROUGH ITS SINGLE LEG AND PASSING THEM TO A SECOND ISOLATOR (9) AND THENCE TO AN OUTPUT PORT (10) THROUGH ONE OF ITS DOUBLE LEGS AND A SECOND PUMPING LASER (8) PRODUCING A SIGNALE AT A SECOND WAVELENGTH SELECTIVE COUPLER (9). THE INVENTION ALSO INCLUDES A METHOD OF AMPLIFYING PRODUCING A SIGNAL AT A SECOND WAVELENGTH AND PASSING IT TO THE OTHER DOUBLE LEG OF THE SECOND WAVELENGTH SLECTOR COUPLER (9). THE INVENTION ALSO INCLUDES A METHOD AMPLIFYING SIGNALS FROM A WAVELENGTH DIVISION MULTIPLEXER USING THE AMPLIFIER.(FIG 1)
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