In this paper we propose a new technique based on tapering of the waveguide layer along the cavity by Shadow Masked Growth (SMG), which yields low threshold lasers with a narrow farfield. Due to the diffusion limited MOVPE growth process the growth velocity V/sub gr/ on the substrate depends on the width of the channel W and the thickness H of the spacerlayer. The velocity will decrease with decreasing width W and increasing thickness H and vice versa. This makes it possible to change the thickness of the layer at predefined places on the substrate by varying the width of the channel. The prepatterned substrates are defined by lithography and wet etching.<>
Narrow farfield, low threshold tapered lasers
Proceedings of LEOS '93 ; 443-444
1993-01-01
130436 byte
Conference paper
Electronic Resource
English
Narrow Farfield, Low Threshold Tapered Lasers
British Library Conference Proceedings | 1993
|Low-Threshold, Efficient Vertical Cavity Lasers with Tapered Apertures
British Library Conference Proceedings | 1998
|