Title :
Measurements of 50 fs nonlinear gain time constant in semiconductor lasers
Author :
Kim, C.B. ; Peng, En T. ; Su, C.B. ; Rideout, W. ; Cha, G.H.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
The symmetric and asymmetric nonlinear gain in 1.3- mu m semiconductor lasers were measured in the frequency domain by a novel pump-probe technique using an external cavity traveling-wave semiconductor ring laser. A very short time constant of about 50 fs was measured as the dominant process. The data also indicated the presence of a smaller contribution approximately 15% of the magnitude of the dominant process and with a long time constant consistent with the effect of hot carriers.<>
Keywords :
laser variables measurement; nonlinear optics; optical pumping; semiconductor lasers; 1.3 micron; 50 fs; IR; external cavity traveling-wave semiconductor ring laser; frequency domain; hot carriers; laser cavity resonators; long time constant; nonlinear gain time constant; pump-probe technique; semiconductor lasers; short time constant; Four-wave mixing; Gain measurement; Hot carriers; Laser excitation; Laser noise; Pump lasers; Quantum well lasers; Ring lasers; Semiconductor lasers; Time measurement;
Journal_Title :
Photonics Technology Letters, IEEE
