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- W4386472788 abstract "Conventional push-pull modulated (PPM) distributed feedback (DFB) lasers exploit structures with symmetry, which wastes a significant amount of the optical power output from the rear facet. To improve the power efficiency, PPM DFB lasers with asymmetrically coated facets can be considered. However, the resulted imbalanced push-pull modulation causes a dip in device small-signal intensity modulation response near the carrier-photon resonance (CPR) frequency, which distorts the waveform and even cuts off the bandwidth. This work proposes an asymmetric section length design in conjunction with the asymmetric facet coating to offset the aforementioned effect on device intensity modulation response. With a delayed push-pull modulation (DPPM) scheme further incorporated, our simulation result shows that the PPM DFB laser with optimized asymmetric structure can enhance the power efficiency and maintain a smooth modulation bandwidth up to around 50 GHz." @default.
- W4386472788 created "2023-09-07" @default.
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- W4386472788 date "2023-10-01" @default.
- W4386472788 modified "2023-10-10" @default.
- W4386472788 title "Output Optical Power Enhancement of Push-Pull Modulated DFB Laser With Asymmetric Structure" @default.
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- W4386472788 doi "https://doi.org/10.1109/jphot.2023.3312388" @default.
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