Wavelength-tunable asymmetric cladding ridge-waveguide distributed Bragg reflector lasers with very narrow linewidth

• Published in: IEEE journal of quantum electronics Vol. 32; no. 7; pp. 1225 - 1229
• Main Authors: Smith, G.M., Hughes, J.S., Lammert, R.M., Osowski, M.L., Papen, G.C., Verdeyen, J.T., Coleman, J.J.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-07-1996; Institute of Electrical and Electronics Engineers
• Subjects: Distributed Bragg reflectors; Distributed feedback devices; Epitaxial growth; Etching; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Gratings; Laser feedback; Laser tuning; Lasers; Optical device fabrication; Optics; Physics; Semiconductor lasers; Semiconductor lasers; laser diodes; Waveguide lasers; Gallium arsenides; Inorganic compounds; Ridge waveguide; Ternary compounds; Quantum wells; Line widths; Far field; Experimental study; Indium arsenides; Fabrication; Semiconductor lasers; Distributed Bragg reflection; Tunable lasers; SCH laser
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.517022

Narrow-linewidth ridge-waveguide distributed Bragg reflector (DBR) lasers with asymmetric cladding are demonstrated. This design requires only a single epitaxial growth of an asymmetric cladding laser structure while the grating and the ridge waveguide are fabricated after the growth. These lasers have a threshold current as low as 9 mA, a slope efficiency of 0.3 W/A, and a T/sub 0/ of 100 K. Wavelength tuning of 8 nm is achieved by current injection heating of the DBR section. A spectral-linewidth minimum of 36 kHz is achieved at an output power of 20 mW and is limited by linewidth rebroadening due to current injection in both the gain section and DBR section.