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1.55-μm spot-size converter integrated laser diode with conventional buried-heterostructure laser process
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- Authors
- Sang-Wan Ryu, Sung-Bock Kim, Jae-Sik Sim, Jeha Kim
- Issue Date
- 2003-01
- Citation
- IEEE Photonics Technology Letters, v.15, no.1, pp.12-14
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- A 1.55-μm spot-size integrated laser diode is demonstrated with conventional buried-heterostructure laser process. For the spot-size converter, we employed a double-waveguide structure in which a ridge-based passive waveguide was incorporated. The passive waveguide was optically combined with a laterally tapered active waveguide to control mode size. The threshold current was measured to be 5 mA together with high slope efficiency of 0.45 W/A. The beam divergence angles in the horizontal and vertical directions were as small as 9.0째 and 7.8째, respectively.