Title :
1.55 μm high efficiency tapered DFB laser using UV 250 2-in technology process
Author :
Voiriot, V. ; Thedrez, B. ; Gentner, J.L. ; Rainsant, J.M. ; Colson, V. ; Duchemin, C. ; Gaborit, F. ; Hubert, S. ; Lafragette, J.L. ; Pinquier, A. ; Roux, L. ; Fernier, B.
Author_Institution :
Opto+. Groupement d´´Interet Econ., Alcatel Corp. Res. Centre, Marcoussis, France
Abstract :
We report on high external efficiency reduced far field divergence DFB laser emitting at 1.55 μm. A high spatial resolution lithography is used to define the tapered section of the spot size converter integrated in the device. Thanks to suitable UV-250 contact lithography process, sub-micron patterns, 2-inch homogeneity, and run to run reproducibility is simultaneously achieved. 15°×15° front facet divergence is obtained allowing 3.6 dB coupling loss to an AR coated end-cleaved standard optical fibre. Threshold current as low as 11 mA and external efficiency up to 0.42 W/A at 25°C have been measured on 500 μm long lasers
Keywords :
antireflection coatings; distributed feedback lasers; laser transitions; optical fabrication; optical films; optical losses; quantum well lasers; semiconductor technology; ultraviolet lithography; 1.55 μm high efficiency tapered DFB laser; 1.55 mum; 11 mA; 2 in; 2-in technology process; 2-inch homogeneity; 25 C; 3.6 dB; 500 mum; AR coated end-cleaved standard optical fibre; UV-250 contact lithography process; coupling loss; external efficiency; far field divergence DFB laser; front facet divergence; high external efficiency; high spatial resolution lithography; run to run reproducibility; spot size converter; sub-micron patterns; tapered section; threshold current; Bragg gratings; Etching; Fiber lasers; High speed optical techniques; Holography; Indium phosphide; Lithography; Optical coupling; Optical feedback; Optical fiber devices;
Conference_Titel :
Indium Phosphide and Related Materials, 1999. IPRM. 1999 Eleventh International Conference on
Conference_Location :
Davos
Print_ISBN :
0-7803-5562-8
DOI :
10.1109/ICIPRM.1999.773628
