Tapered active stripe for 1.5-μm InGaAsP/InP strained multiple quantum well lasers with reduced beam divergence
- 31 January 1994
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 64 (5) , 539-541
- https://doi.org/10.1063/1.111096
Abstract
We propose and demonstrate the application of an intracavity horizontally tapered (in width) active stripe to adiabatically reduce the output beam divergence of a 1.48-μm InGaAsP/InP strained quantum well laser. We achieve far-field full width at half-maximum divergences as low as 13° together with 100 mW emitted power into stable single transverse mode and 400 mA driving current. Maximum coupling efficiency to lensed single mode fiber of 73% is obtained.Keywords
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