상세정보
학술대회
Low Polarization Dependent Loss of InP-based Waveguide Photodetector Integrated with Spot-Size Converter for 100Gb/s Coherent Receiver
- 발행일
- 201602
- 출처
- Optical Components and Materials XIII (SPIE 9744), v.9744, pp.1-6
- 협약과제
- 15MB1200, 소프트웨어 정의 네트워크(SDN) 기반 Flexible 광노드 핵심기술 개발, 권용환
- 초록
- We demonstrated the waveguide photodetector (WG PD) integrated with spot-size converter (SSC) for coherent receiver of 100Gb/s operation. The WG PD integrated with SSC was designed as diluted WG, dual lateral taper structure, and PIN-photodiode. The epitaxial layers of InxGa1-xAsyP1-y/InP, InxGa1-xAsyP1-y, and InGaAs were adopted as the diluted WG, dual tapers, and absorber of PD, respectively. The shape and thickness of each structure were determined through the simulation of 3D finite-difference beam propagation method. Although the evanescent coupling was highly sensitive, we optimized the structures with simulated responsivity and polarization dependent loss (PDL) as 0.70 A/W and 0.1 dB, respectively. We successfully obtained the SSC-integrated WG PD through numerous fabrication process including photolithography. The electrical and optical properties were characterized with laser launching. Fabricated PDs had almost similar responsivity and PDL with the simulation results. The responsivity and PDL were measured as 0.7 A/W and less than 0.3 dB respectively. The 3 dB-bandwidth was measured as 34 GHz. We successfully realized low PDL and high responsivity by adopting the lateral taper structure for SSC-integrated WG PD.
- KSP 제안 키워드
- Coherent receiver, Electrical and optical properties, Epitaxial layers, Evanescent coupling, Finite-difference beam propagation method, Highly sensitive, InP-based, Low polarization, PIN photodiodes, Polarization dependent loss, Spot size converter(SSC)