Title :
Shallow surface gratings for high-power VCSELs with one preferred polarization for all modes
Author :
Ostermann, Johannes Michael ; Debernardi, Pierluigi ; Jalics, Christof ; Michalzik, Rainer
Author_Institution :
Optoelectronics Dept., Univ. of Ulm, Germany
Abstract :
Monolithically integrated full-aperture surface gratings are shown to control the polarization of all modes of even highly multimode 850-nm oxide-confined standard industrial vertical-cavity surface-emitting lasers (VCSELs). An orthogonal polarization suppression ratio (OPSR) of more than 11 dB up to thermal rollover is achieved for an output power of 23 mW. For devices with 8-mW output power, an OPSR of more than 20 dB at thermal rollover is observed, without major drawbacks to the overall laser performance.
Keywords :
diffraction gratings; integrated optoelectronics; laser cavity resonators; laser modes; light polarisation; monolithic integrated circuits; optical variables control; semiconductor lasers; surface emitting lasers; 23 mW; 8 mW; full-aperture surface gratings; high-power VCSEL; laser modes; monolithic integration; multimode lasers; orthogonal polarization suppression ratio; oxide confined VCSEL; polarization control; semiconductor lasers; shallow surface gratings; standard industrial VCSEL; thermal rollover; vertical-cavity surface-emitting lasers; Etching; Gratings; Lasers and electrooptics; Mirrors; Optical control; Optical polarization; Optical resonators; Optical surface waves; Surface emitting lasers; Vertical cavity surface emitting lasers; Optical gratings; polarization control; vertical-cavity surface-emitting laser (VCSEL);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.851935
