Title :
Properties of loss-coupled distributed feedback laser arrays for wavelength division multiplexing systems
Author :
Hansmann, Stefan ; Dahlhof, Kornelia ; Kempf, Bertilo E. ; Göbel, Rainer ; Kuphal, Eckart ; Hübner, Bernd ; Burkhard, Herbert ; Krost, Alois ; Schatke, Kathrin ; Bimberg, Dieter
Author_Institution :
Technologiezentrum, Deutsche Telekom AG, Darmstadt, Germany
fDate :
7/1/1997 12:00:00 AM
Abstract :
The characteristics of loss-coupled distributed feedback (DFB) semiconductor laser arrays are investigated both theoretically and experimentally. Using simulations based on a transfer matrix method, the strong influence of the residual facet reflectivity on the singlemode yield and the statistical fluctuation of the emission wavelength for as-cleaved and AR/HR coated loss-coupled DFB lasers is pointed out and compared to purely index-coupled λ/4 phase-shifted devices. Experimental results and the fabrication techniques are given for loss-coupled 1.55 μm InGaAs/InGaAlAs/InP DFB laser arrays with four channels and integrated striped thin-film heaters, which were successfully used for fine tuning the channel spacings
Keywords :
III-V semiconductors; aluminium compounds; distributed feedback lasers; gallium arsenide; indium compounds; laser modes; laser theory; laser transitions; optical fabrication; optical losses; optical transmitters; quantum well lasers; reflectivity; semiconductor device models; semiconductor laser arrays; transfer function matrices; wavelength division multiplexing; 1.55 mum; AR/HR coated loss-coupled DFB lasers; DFB semiconductor laser arrays; InGaAs-InGaAlAs-InP; as-cleaved lasers; channel spacings; emission wavelength; fabrication techniques; fine tuning; index-coupled λ/4 phase-shifted devices; integrated striped thin-film heaters; loss-coupled 1.55 μm InGaAs/InGaAlAs/InP DFB laser arrays; loss-coupled distributed feedback laser arrays; residual facet reflectivity; simulations; singlemode yield; statistical fluctuation; transfer matrix method; wavelength division multiplexing systems; Distributed feedback devices; Fluctuations; Indium gallium arsenide; Laser feedback; Laser theory; Laser tuning; Optical arrays; Optical device fabrication; Reflectivity; Semiconductor laser arrays;
Journal_Title :
Lightwave Technology, Journal of
