Narrow linewidth 1.52 -m InAs/InP quantum dot DFB lasers

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TypeArticle
Proceedings titleConference Proceedings - International Conference on Indium Phosphide and Related Materials
Conference2011 Compound Semiconductor Week and 23rd International Conference on Indium Phosphide and Related Materials, CSW/IPRM 2011, 22 May 2011 through 26 May 2011, Berlin
ISSN1092-8669
ISBN9781457717536
Article number5978392
SubjectCavity length; Continuous-wave operations; Gain medium; InAs/InP; Injection currents; InP substrates; Narrow-line width; Optical linewidth; Output power; Photoluminescence peak; Relative intensity noise; Ridge waveguide lasers; Side mode suppression ratios; Single mode; Wavelength ranges; Chemical beam epitaxy; Distributed feedback lasers; Indium phosphide; Ridge waveguides; Semiconductor junctions; Semiconductor quantum dots
AbstractWe have grown, fabricated, and tested single mode ridge-waveguide distributed feedback lasers utilising InAs/InP quantum dots as the gain medium. The growth of quantum dots on InP substrates allows us to reach the important 1.55 μm telecommunications wavelength range, in this case lasing at 1.52 μm. The quantum dot gain medium was grown using chemical beam epitaxy, and the top cladding regrown after grating patterning using metal-organic-chemical vapourdeposition. No shift in the photoluminescence peak wavelength of the dots was observed following top cladding regrowth. Ridge waveguide lasers were fabricated with ridge widths of 3 μm and cleaved to 500 μm and 1 mm cavity lengths. The facets were coated to provide reflectivities of 65% and 2%. In continuous wave (cw) operation single-mode output was observed with a side mode suppression ratio greater than 61 dB, and an output power of 9.7 mW at an injection current of 150 mA. Operation up to 80°C was achieved. The relative intensity noise was measured to be less than - 154 dB/Hz from 10 MHz to 10 GHz, and the optical linewidth to be less than 150 KHz for the best devices. © VDE VERLAG GMBH.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences (IMS-ISM)
Peer reviewedYes
NPARC number21271309
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Record identifier45bcde93-720e-4a15-bcb4-6a6bb97824c1
Record created2014-03-24
Record modified2016-05-09
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