Title :
Wavelength stabilized single-mode lasers by coupled micro-square resonators
Author :
Bach, L. ; Reithmaier, J.P. ; Forchel, A. ; Gentner, J.L. ; Goldstein, L.
Author_Institution :
Technische Phys., Univ. Wurzburg, Germany
fDate :
3/1/2003 12:00:00 AM
Abstract :
Wavelength stabilized single-mode lasers were realized by on-chip coupling of a ridge waveguide laser with two micro-ring resonators. The micro-ring resonators were fabricated by deeply etching to achieve high lateral optical confinement and to allow small ring diameters in the range between 20-60 μm. A square-like ring geometry with 45/spl deg/ facets was used to improve design control and side-wall quality. By using micro rings with two different diameters of 50 and 60 μm, a free spectral range of about 18 nm could be obtained which allow a stable single-mode operation with a side-mode suppression ratio of more than 40 dB and a continuous-wave output power of 30 mW per facet at room temperature.
Keywords :
laser frequency stability; laser modes; microcavity lasers; optical fabrication; quantum well lasers; ridge waveguides; ring lasers; sputter etching; waveguide lasers; 20 to 60 micron; 30 mW; GaInAsP-InP; GaInAsP-InP laser structure; InGaAsP quantum wells; continuous-wave output power; coupled micro-square resonators; deep etching fabrication; design control; free spectral range; high lateral optical confinement; micro-ring resonators; on-chip coupling; ridge waveguide laser; room temperature; semiconductor ring resonators; side-mode suppression ratio; side-wall quality; small ring diameters; square-like ring geometry; stable single-mode operation; wavelength stabilized single-mode lasers; Etching; Geometrical optics; Laser stability; Optical coupling; Optical resonators; Optical waveguides; Power generation; Ring lasers; Temperature distribution; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.807938
