Title :
Laser diode pumped Pr3+-doped and Pr3+-Yb3+-codoped fluoride fiber amplifiers operating at 1.3 mu m
Author :
Ohishi, Y. ; Kanamari, T. ; Temmyo, I. ; Wada, M. ; Yamada, M. ; Shimizu, M. ; Yashino, K. ; Hanafusa, H. ; Horiguchi, M. ; Takahashi, S.
Author_Institution :
NTT Opto-Electron. Lab., Nippon Telegraph & Telephone Corp., Ibaraki, Japan
Abstract :
Both Pr3+-doped and Pr3+-Yb3+-codoped singlemode fibres with high numerical apertures are pumped by laser diodes with InGaAs/GaAs strained quantum well structures. A net gain of 5.2 dB is obtained from Pr3+-doped fluoride fibre pumped by laser diodes operating at 1.1017 mu m and a net gain of 3.2 dB is obtained from Pr3+-Yb3+-codoped fibre pumped by laser diodes operating at 0.98 mu m. The pumping efficiency difference between Pr3+-doped and Pr3+-Yb3+-codoped fibre is discussed.
Keywords :
aluminium compounds; barium compounds; fibre lasers; fluoride glasses; lanthanum compounds; laser transitions; lithium compounds; optical pumping; praseodymium; sodium compounds; ytterbium; yttrium compounds; zirconium compounds; 0.98 micron; 1.017 micron; 1.3 micron; 3.2 dB; 5.2 dB; InGaAs-GaAs; ZrF 4-BaF 2-LaF 3-YF 3-AlF 3-LiF-NaF:Pr 3+,Yb 3+; laser diode pumping; numerical apertures; pumping efficiency; singlemode fibres; strained quantum well structures;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19911236
