Patent ID: 6212000
Filing Date: 2001-04-03
Classification: H01S,H04B

Abstract:
A two-way optical amplifier module, comprising:a single optical amplifier including an optical fiber doped with a rare-earth element for amplifying upward signal light and downward signal light;a first optical circulator for both transmitting said upward signal light to said optical amplifier and transmitting said downward signal light amplified by said optical amplifier;a second optical circulator for both transmitting said downward signal light to said optical amplifier and transmitting said upward signal light amplified by said optical amplifier;a first light source for supplying exciting light to said optical amplifier for amplification of said upward signal light;a second light source for supplying exciting light to said optical amplifier for amplification of said downward signal light;a first reflecting bandpass filter for eliminating ASE (Amplified Spontaneous Emission) during passage of said upward signal light amplified by said optical amplifier through said second optical circulator by reflecting only said upward signal light; anda second reflecting bandpass filter for eliminating ASE during passage of said downward signal light amplified by said optical amplifier through said first optical circulator by reflecting only said downward signal light.