Title :
Emitting far field pattern study of long wavelength grating coupling surface emitting lasers
Author :
Shih, M.H. ; Fan, J.J. ; Gopal, C. ; Choa, F.S. ; Simonis, G.J. ; Tanbun-Ek, T. ; Logan, R.A. ; Tsang, W.T. ; Sergent, A.M.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., Baltimore, MD, USA
fDate :
31 Oct-3 Nov 1994
Abstract :
We demonstrate a very low threshold 1.55 μm grating coupled surface emitting laser (GCSEL) with a CW room temperature threshold of only 6 mA. The laser structure is a multi-quantum well distributed-feedback (DFB) laser with a second order grating buried under the gain medium. The laser is fabricated by following the capped-mesa buried heterostructure (CMBH) process with a stripe width of around 0.9 to 1.2 μm wide. We have measured the FWHM of the far field intensity profile of the laser
Keywords :
surface emitting lasers; 0.9 to 1.2 micron; 1.55 micron; 6 mA; CW room temperature threshold; capped-mesa buried heterostructure; far field pattern; long wavelength grating coupling surface emitting laser; multi-quantum well distributed-feedback laser; Diffraction gratings; Image processing; Laser modes; Laser theory; Optical coupling; Optical surface waves; Power generation; Surface emitting lasers; Surface waves; Vertical cavity surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1994. LEOS '94 Conference Proceedings. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-1470-0
DOI :
10.1109/LEOS.1994.586990
