상세정보
학술지
Monolithic integration of a multiwavelength laser array associated with asymmetric sampled grating lasers
- 발행일
- 200212
- 출처
- IEEE Journal of Selected Topics in Quantum Electronics, v.8 no.6, pp.1358-1365
- ISSN
- 1077-260X
- 출판사
- IEEE
- 협약과제
- 02MB4700, 하이브리드 집적 파장선택형 8채널 WDM 광원모듈, 김제하
- 초록
- 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 제안 키워드
- E-beam Lithography, Four-Channel, High power, High yield, Laser array, Monolithic Integration, Multiwavelength lasers, Novel approach, Numerical Analysis, Sampled grating, Single mode