Title :
Gain saturation and propagation characteristics of index-guided tapered-waveguide traveling-wave semiconductor laser amplifiers (TTW-SLAs)
Author :
Bendelli, Giampaolo ; Komori, Kazuhiro ; Arai, Shigehisa
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan
fDate :
2/1/1992 12:00:00 AM
Abstract :
A model is developed to investigate the propagation characteristics and gain saturation performances of tapered-waveguide traveling-wave semiconductor laser amplifiers (TTW-SLAs). The influences of several physical mechanisms are analyzed. Two taper geometries are studied in detail: the exponential TTW-SLA and the linear TTW-SLA. The first is shown to be more efficient for narrow tapers (output width <14 μm), whereas the linear TTW-SLA becomes superior for wide-taper geometries because of its better adiabatic propagation characteristics. Both tapered structures can provide a consistent improvement in the saturation output power compared to the conventional TTW-SLA, reaching absolute values on the order of ~18 dBm and ~23 dBm for the exponential and linear TTW-SLAs, respectively
Keywords :
laser theory; optical saturation; optical waveguide theory; refractive index; semiconductor device models; semiconductor junction lasers; adiabatic propagation characteristics; diode lasers; gain saturation performances; index-guided; narrow tapers; output width; physical mechanisms; propagation characteristics; saturation output power; taper geometries; tapered-waveguide; traveling-wave semiconductor laser amplifiers; wide-taper geometries; Charge carrier lifetime; High power amplifiers; Laser modes; Optical propagation; Optical saturation; Power generation; Semiconductor lasers; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Quantum Electronics, IEEE Journal of
