Title :
Small signal analysis of THz optical-frequency conversion in an injection-locked semiconductor laser
Author :
Li, Linlin ; Petermann, Klaus
Author_Institution :
Inst. fur Hochfrequenztech., Tech. Univ. Berlin, Germany
fDate :
12/1/1993 12:00:00 AM
Abstract :
A theory of terahertz optical-frequency conversion using highly nondegenerate four-wave mixing (FWM) in an injection-locked semiconductor laser is presented, using small-signal analysis. The optical frequency conversion can be realized through the use of cavity-enhanced highly nondegenerate FWM in an injection-locked semiconductor laser in a range of 1-THz detuning frequency between the pump and the probe waves, when the probe frequency is tuned close to one of the resonance modes. The frequency conversion is mainly attributed to the nonlinear gain effect. The maximum bandwidth of the converted signal is increased by shortening the laser cavity length. The frequency conversion efficiency is asymmetrical with respect to both the zero detuning frequency and the resonance mode where the converted signal appears. The theoretical results agree with experiments
Keywords :
laser cavity resonators; laser mode locking; laser theory; multiwave mixing; optical frequency conversion; optical pumping; semiconductor lasers; 1 THz; 1-THz detuning frequency; THz optical-frequency conversion; cavity-enhanced highly nondegenerate FWM; converted signal; frequency conversion; frequency conversion efficiency; highly nondegenerate four-wave mixing; injection-locked semiconductor laser; laser cavity length; maximum bandwidth; nonlinear gain effect; probe frequency; probe waves; pump waves; resonance mode; resonance modes; small signal analysis; small-signal analysis; terahertz optical-frequency conversion; tuned; zero detuning frequency; Frequency conversion; Laser theory; Laser tuning; Nonlinear optics; Optical frequency conversion; Optical mixing; Optical pumping; Pump lasers; Semiconductor lasers; Signal analysis;
Journal_Title :
Quantum Electronics, IEEE Journal of
