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Journal Article
Two-step laterally tapered spot-size converter 1.55-/spl mu/m DFB laser diode having a high slope efficiency
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- Authors
- S. W. Park, J. H. Han, Y. T. Han, S. S. Park, B. Y. Yoon, B. K. Kim, H. K. Sung, J. I. Song
- Issue Date
- 2006-10
- Citation
- IEEE Photonics Technology Letters, v.18, no.20, pp.2138-2140
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We demonstrate a two-step lateral tapered 1.55-μm spot-size converter distributed feedback laser diode (SSC DFB LD) having slope efficiencies as high as 0.457 and 0.319 mW/mA measured at 25 °C and 85 °C, respectively. The SSC DFB LD fabricated by using a nonselective grating process has a double core waveguide structure including a planar buried heterostructure type active waveguide and a ridge type passive waveguide. The fabricated SSC DFB LD operates at 1.553-μm wavelength and shows a far-field pattern in horizontal and vertical directions of 7.3째 and 11.6째, respectively. © 2006 IEEE.