1.55 /spl mu/m high efficiency tapered DFB laser using UV 250 2-in technology process

• Published in: Conference Proceedings. Eleventh International Conference on Indium Phosphide and Related Materials (IPRM'99) (Cat. No.99CH36362) pp. 33 - 36
• Main Authors: 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.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1999
• Subjects: Bragg gratings; Etching; Fiber lasers; High speed optical techniques; Holography; Indium phosphide; Lithography; Optical coupling; Optical feedback; Optical fiber devices
• ISBN: 9780780355620; 0780355628
• ISSN: 1092-8669
• DOI: 10.1109/ICIPRM.1999.773628

We report on high external efficiency reduced far field divergence DFB laser emitting at 1.55 /spl mu/m. 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/spl deg//spl times/15/spl deg/ 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/spl deg/C have been measured on 500 /spl mu/m long lasers.