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High single-mode-yield multiple-wavelength DFB-laser arrays in the 1.55 mu m range

: Kreissl, J.; Troppenz, U.; Rehbein, W.; Hüttl, B.; Lenz, E.; Venghaus, H.; Fidorra, F.


TU Eindhoven:
27th European Conference on Optical Communication 2001. Proceedings. Vol.2: Regular papers & invited papers : Symposia on selected topics: Convergence of IP and optical networking, polymer fiber communication, optical interconnects, photonic crystals, from physical concepts to device implementation, September 30 - October 4, 2001, RAI Congress Centre, Amsterdam, The Netherlands
Piscataway, NJ: IEEE, 2001
ISBN: 0-7803-6705-7
European Conference on Optical Communication (ECOC) <27, 2001, Amsterdam>
Fraunhofer HHI ()
diffraction gratings; distributed feedback lasers; gallium arsenide; iii-v semiconductors; indium compounds; laser modes; laser stability; quantum well lasers; semiconductor laser arrays; waveguide lasers; high single-mode-yield multiple-wavelength dfb-laser arrays; 1.55 mu m range; dfb grating design; four wavelength laser array; single mode operation; high power output; single laser yield stability; phase-shifted index grating control; tailored phase shift design; ridge waveguide lasers; in1-xgaxas1-ypy strained layer multi-quantum well; 1.55 micron; in1-xgaxas1-ypy

Based on a DFB grating design we have developed a four wavelength laser array with excellent single mode operation and high power output. We could routinely stabilize a high level of single laser yield of about 90% and hence, array yields better than 60%. This was accomplished by a precise control of phase-shifted index gratings with kappa L = 1.5. To use the advantage of higher grating feedback with kappa L > 1.5 the single mode yield was improved by a tailored phase shift design.