Abstract :
Several important applications in optical communications require high power fiber coupled laser sources operating at 1.3 μm, 1.48 μm and 1.55 μm. Semiconductor diode lasers for these wavelengths can be fabricated using the InP/lnGaAsP material system. High power operation requires careful selection of the active region, p and n doping and the lateral waveguide structure. Additionally, distributed feedback (DFB) lasers require appropriate choice of grating feedback. High power, narrow linewidth and low noise single mode diode laser sources operating at 1.3 μm and 1.55 μm wavelengths have applications in cable television transmission systems, microwave photonics, interferometric sensors and as an alternative to diode-pumped solid state lasers. High output power is desirable to overcome losses in external modulators and for large scale distribution systems. It is particularly important for 1.3 μm applications as reliable and efficient fiber amplifiers are not commercially available at this wavelength. 1.3 μm DFB lasers with 440 mW chip power, over 150 mW fiber coupled power and 100 kHz linewidth have been demonstrated
Keywords :
III-V semiconductors; diffraction gratings; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; laser beams; laser feedback; laser modes; laser noise; optical fibre communication; optical transmitters; semiconductor lasers; waveguide lasers; 1.3 mum; 1.48 mum; 1.55 mum; 100 kHz; 150 mW; 440 mW; DFB lasers; InP-InGaAsP; InP/lnGaAsP material system; active region; cable television transmission systems; chip power; diode-pumped solid state lasers; distributed feedback lasers; external modulators; fiber amplifiers; fiber coupled power; grating feedback; high output power; high power fiber coupled laser sources; high power narrow linewidth; high power operation; high-power semiconductor lasers; interferometric sensors; large scale distribution systems; lateral waveguide structure; linewidth; losses; low noise single mode diode laser sources; microwave photonics; n doping; optical communications; p doping; semiconductor diode lasers; Distributed feedback devices; Fiber lasers; Indium phosphide; Laser feedback; Optical coupling; Optical fiber communication; Power lasers; Semiconductor diodes; Semiconductor lasers; Waveguide lasers;
