Title :
Tilted mirror for lateral mode discrimination and higher kink-free power in fiber pump lasers
Author :
Tan, Genlin L. ; Sargent, Edward H. ; Xu, Jimmy M.
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont., Canada
fDate :
2/1/1998 12:00:00 AM
Abstract :
Beam steering arising from interference between the fundamental lateral mode and higher order lateral modes limits the performance of 980-nm power lasers. In this paper, we analyze the feasibility of using a tilted mirror to discriminate against higher order modes. We calculate the reflectivity seen by different modes as a function of the thickness and tilt angle of the coating. Our results suggest that careful engineering of tilted coated mirrors represents a viable technique for improving the performance of power lasers
Keywords :
fibre lasers; laser beams; laser mirrors; laser modes; optical pumping; quantum well lasers; semiconductor lasers; 980 nm; AlGaAs; AlGaAs DH laser; InGaAs-GaAs-AlGaAs; InGaAs-GaAs-AlGaAs power laser; beam steering; coating; fiber pump lasers; fundamental lateral mode; higher kink-free power; higher order lateral modes; higher order modes; interference; lateral mode discrimination; performance; power lasers; reflectivity; thickness; tilt angle; tilted coated mirrors; tilted mirror; Fiber lasers; Laser excitation; Laser mode locking; Laser modes; Mirrors; Power lasers; Pump lasers; Reflectivity; Semiconductor lasers; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
