BROWSE
Detail
Journal Article
Monolithic integration of a multiwavelength laser array associated with asymmetric sampled grating lasers
Cited 24 time in 
Share 
Share
- Authors
- Sang-Wan Ryu, Sung-Bock Kim, Jae-Sik Sim, Jeha Kim
- Issue Date
- 2002-12
- Citation
- IEEE Journal of Selected Topics in Quantum Electronics, v.8, no.6, pp.1358-1365
- ISSN
- 1077-260X
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We present a novel approach for a monolithically integrated multiwavelength laser array based on asymmetric sampled grating lasers. The asymmetric sampled grating laser combines sampled gratings of different periods with an index shifter to utilize the first-order reflection for lasing operation. With this structure, a simple fabrication procedure as well as high yield could be achieved without using complex and time-consuming e-beam lithography for multiperiod gratings. With numerical analysis based on a transfer matrix method, the effect of grating strength and mirror coating was analyzed to improve single-mode and power extraction performance. By using high-reflection/antireflection coatings on both facets, it was shown theoretically that high-power extraction efficiency as well as high single-mode yield was achieved. A four-channel laser array with 400-GHz wavelength spacing was fabricated and its operation at designed wavelengths was demonstrated. The individual laser showed a threshold current of 9-13 mA and a slope efficiency of around 0.21 W/A. A high sidemode suppression ratio over 44 dB was observed as well.
- KSP Keywords
- E-beam Lithography, First order, Four-Channel, High power, High yield, Laser array, Monolithic Integration, Multiwavelength lasers, Novel approach, Numerical Analysis, Sampled grating