1、S-band optical amplification by an internally generated pump in thulium ytterbium co-doped fiber,Example 2:,0.1,0.2,0.3,0.4,0.5,0.6,衰减 (dB/km),1600,1700,1400,1300,1200,1500,1100,波长(nm),Research idea,Dry fiber( all wave) is developed to get rid of water peak.,EDFA,?,TDFA scheme is presented,According
2、 to the energy level & transitions, usually 1050nm is chosen as pump source,1050nm is generated by YDF laser pumped by low cost 980 nm LD,Disadvantage: complicated, 1050nm output from YDF laser, intensity becomes low,Any creative design?,Advantage: compact, 1050nm high intensity inside resonator,Tm
3、is pumped inside YDF laser cavity,1.Investigate energy level & transition,Procedure of rate equation scheme,2. Write Rate equation groups,3. Propagation groups,4. Solve the groups,5. Get the feature,Energy level & transition of thulium & ytterbium ion,Rate equation groups,In which:,Get the parameter
4、s,Route,2. S and C-band optical amplification in thulium and erbium co-doped fluoride fiber,0.1,0.2,0.3,0.4,0.5,0.6,衰减 (dB/km),1600,1700,1400,1300,1200,1500,1100,波长(nm),Research idea,S-band became potential transmission windows with the development of dry fibers,S-band and C-band OA is needed,TDFA+E
5、DFA scheme is usually taken to meet the demand, however, this scheme is low efficient, not convenient,Any creative design?,Advantage: compact, easy to use,S+C band , thulium & erbium co-doped fluoride fiber amplifier is presented,Pump scheme must be carefully designed Erbium pump wavelength: 800, 98
6、0, 1480. Thulium pump wavelength:single 1050nm; dual 800+1410, 800+1050 So we choose: 800+1410, 800+1050 erbium, thulium co-doped fiber S+C band amplification,Besides, energy transfer process between must be considered,1.Investigate energy level & transition,Procedure of rate equation scheme,2. Write Rate equation groups,3. Propagation groups,4. Solve the groups,5. Get the feature,Rate equation + propagation equation,Route,3. Optical amplification in Yb3+-co-doped thulium doped silica fiber,4. Outlook,
