Title :
980-nm master oscillator power amplifiers with nonabsorbing mirrors
Author :
Lammert, R.M. ; Ungar, J.E. ; Osowski, M.L. ; Qi, H. ; Newkirk, M.A. ; Chaim, N. Bar
Author_Institution :
Ortel Corp., Alhambra, CA, USA
Abstract :
High-power master oscillator power amplifiers with nonabsorbing mirrors have been fabricated. These devices exhibit 1.0 and 1.5 W of single-frequency diffraction-limited continuous-wave optical powers at relatively low-amplifier currents of 1.75 and 2.6 A, respectively. These devices operate with a single longitudinal mode with a 40-dB sidemode suppression ratio over the entire amplifier current range without any longitudinal mode hops as a result of the very low optical feedback from the PA facet. Coupling of over 500 mW into a single-mode fiber is also achieved.
Keywords :
distributed feedback lasers; laser beams; laser feedback; laser mirrors; laser modes; optical fabrication; optical fibre couplers; power amplifiers; semiconductor optical amplifiers; 1 W; 1.5 W; 1.75 A; 2.6 A; 500 mW; 980 nm; amplifier current range; coupling; fabrication; high-power master oscillator power amplifiers; low-amplifier currents; master oscillator power amplifiers; mode hops; nonabsorbing mirrors; optical feedback; power amplifier facet; sidemode suppression ratio; single longitudinal mode; single-frequency diffraction-limited continuous-wave optical powers; single-mode fiber; High power amplifiers; Mirrors; Optical amplifiers; Optical devices; Optical diffraction; Optical feedback; Oscillators; Power amplifiers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
