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학술지 Superluminescent Diode With Circular Beam Shape
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저자
오수환, 권오기, 윤기홍, 김기수, 권오균
발행일
201312
출처
IEEE Photonics Technology Letters, v.25 no.23, pp.2289-2292
ISSN
1041-1135
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LPT.2013.2285255
협약과제
12VB1400, 액세스 네트워크용 광집적기반 OLT 서브모듈 플랫폼 개발, 권오균
초록
We report a new design for a superluminescent diode (SLD) that can provide a nearly circular output beam shape and a high output power in a tunable external cavity laser (T-ECL). The proposed SLD consists of an active region and a spot size converter (SSC) region. The active region is realized using a planar buried hetero structure for low electrical and optical leakages and the SSC region is realized using a buried deep ridge waveguide (BD-RWG) for narrow far-field patterns. In particular, we investigate the effects of the structural parameters in the SSC region on the output chip power and field patterns. In our structure, as the width of the passive waveguide core layer decreases, both the lateral and vertical far-field patterns tend to converge at {\sim}{\rm 13} \circ under an etching depth of BD-RWG of {\geq}{\rm 9}~\mu{\rm m}. The measured data agree well with the simulated results. Using this design, we can increase the output power of T-ECL from 3.7 to 7.9 mW at an injection current of 60 mA. © 2013 IEEE.
키워드
buried deep ridge waveguide, double-waveguide-core structure, spot-size converter, Superluminescent diode
KSP 제안 키워드
Beam shape, Circular beam, Core structure, Deep ridge waveguide, Etching depth, External cavity laser, High output power, Injection current, Ridge waveguides(RWs), Spot size converter(SSC), Superluminescent diodes(SLDs)