Gain-clamped optical amplifying apparatus using fiber Raman amplifier having Raman cavity

A gain-clamped (GC) optical amplifier based on a fiber Raman amplifier (FRA) with a Raman cavity, comprising:

• a Raman fiber module (RFM) amplifying an input optical signal and outputting the amplified input optical signal;
• a Fabry-Perot cavity generating a Raman laser signal, wherein said Fabry-Perot cavity is formed by a pair of optical mirrors in inner parts of an input terminal and an output terminal of the RFM;
• and
• a ring cavity generating a gain clamping laser signal (GC laser signal), wherein the ring cavity is formed as a feedback loop between the input terminal and the output terminal of the RFM.

A gain-clamped (GC) optical amplifier using a fiber Raman amplifier (FRA) having a Raman cavity, comprising:

• a Raman fiber module (RFM) amplifying an input optical signal and outputting the amplified input optical signal;
• a ring cavity generating a Raman laser signal, wherein the ring cavity is formed as a feedback loop between an input terminal and an output terminal of the RFM;
• and
• a Fabry-Perot cavity generating a gain clamping laser signal (GC laser signal), wherein said Fabry-Perot cavity is formed by a pair of optical mirrors in outer parts of the input terminal and the output terminal of the RFM.

A gain-clamped (GC) optical amplifier using a fiber Raman amplifier (FRA) having a Raman cavity, comprising:

• a Raman fiber module (RFM) amplifying an input optical signal and outputting the amplified input optical signal;
• a Fabry-Perot cavity generating a Raman laser signal, wherein the Fabry-Perot cavity is formed by a pair of optical mirrors in inner parts of an input terminal and an output terminal of the RFM;
• a Fabry-Perot cavity generating a gain clamping laser signal (GC laser signal), wherein said Fabry-Perot cavity is formed by a pair of optical mirrors in outer parts of the input terminal and the output terminal of the RFM;
• and
• a pump being located between the output mirrors of the Raman laser signal and the GC laser signal and generating the Raman laser signal and the GC laser signal while pump light passes through the RFM.