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【正文】 vices for WDM Optical Fiber Network Systems ? Light Sources – Lowcost uncooled LDs – Directly modulated LDs – Modulator integrated DFB LDs – Wavelength tunable/selectable LDs ? HighSpeed Photodetectors ? SOA and Wavelength Converter ? AWG and Related 2023/1/17 5 State Key Lab on Integrated Optoelectronics 2023/1/17 6 State Key Lab on Integrated Optoelectronics LowCost Uncooled LDs ? Applications – Access work – Metropolitan transmission – Bit rate: 155 MB/s (FPLDs) ~ 10 Gb/s (DFBLDs) ? Requirements – Wide temperature range operation – Costeffective structure for device fabrication – High efficiency and large tolerance for coupling output light into a single mode fiber 2023/1/17 7 State Key Lab on Integrated Optoelectronics Uncooled GainCoupled DFB LDs ? Stable single mode operation from 40 to 85?C ? Integrated beamexpander for improved coupling tolerance ? Gaincoupled DFB lasers with currentblocking gratings 2023/1/17 8 State Key Lab on Integrated Optoelectronics Directly Modu
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